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Lessard-Roy A, Marchand R, Lemieux P, Masse M, Lacerte A, Carmichael PH, Laurin D. Immune checkpoint inhibitors and risk of immune-mediated adverse events: a cohort study comparing extended versus standard interval administration. Clin Exp Med 2024; 24:40. [PMID: 38386053 PMCID: PMC10884063 DOI: 10.1007/s10238-024-01301-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/19/2024] [Indexed: 02/23/2024]
Abstract
The COVID-19 pandemic precipitated the implementation of extended interval immune checkpoint inhibitors (ICIs) in an effort to limit hospital visits, but few studies have examined their safety. This study aimed to compare in oncology outpatients, immune-mediated adverse events (IMAEs) in terms of total number, incidence, severity, and time to occurrence, based on exposure to standard or extended interval ICIs. A retrospective cohort study was conducted in patients who received at least one dose of an ICI between 2015 and 2021. Data were collected from patient records and pharmacy software. Adjusted logistic, Poisson, and Cox regression models were estimated. A total of 310 patients with a mean age of 67.1 years were included, 130 of whom had the extended interval. No statistically significant differences were observed between the groups. With the standard and extended intervals, the mean total number of IMAE per participant was 1.02 and 1.18, respectively; the incidence of an IMAE was 62% and 64%. Of the 147 IMAE episodes in the standard interval group, 14 (9.5%) were grade 3 or higher, while there were 15 (12.4%) among the 121 IMAE episodes in the extended interval group. Compared with standard interval, the use of extended interval did not increase the risk of having a first IMAE (adjusted hazard ratio 0.92 (95% CI 0.67-1.26)). This study suggests that the administration of an ICI according to extended interval is as safe as the administration according to standard interval in oncology outpatients.
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Affiliation(s)
- Amélia Lessard-Roy
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada
- Département de Pharmacie, Hôpital Sainte-Croix, Centre Intégré Universitaire de Santé et de Services Sociaux de la Mauricie-et-du-Centre-du-Québec, Drummondville, Canada
| | - Roxanne Marchand
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada
- Département de Pharmacie, Centre Hospitalier Affilié Universitaire Régional de Trois-Rivières, Centre Intégré Universitaire de Santé et de Services Sociaux de la Mauricie-et-du-Centre-du-Québec, 1991 Boul. du Carmel, Trois-Rivières, QC, G8Z 3R9, Canada
| | - Pierre Lemieux
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada.
- Département de Pharmacie, Centre Hospitalier Affilié Universitaire Régional de Trois-Rivières, Centre Intégré Universitaire de Santé et de Services Sociaux de la Mauricie-et-du-Centre-du-Québec, 1991 Boul. du Carmel, Trois-Rivières, QC, G8Z 3R9, Canada.
| | - Mélanie Masse
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada
- Département de Pharmacie, Centre Hospitalier Affilié Universitaire Régional de Trois-Rivières, Centre Intégré Universitaire de Santé et de Services Sociaux de la Mauricie-et-du-Centre-du-Québec, 1991 Boul. du Carmel, Trois-Rivières, QC, G8Z 3R9, Canada
| | | | - Pierre-Hugues Carmichael
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada
- Centre d'excellence sur le Vieillissement de Québec, Centre Intégré Universitaire de Santé et de Services Sociaux de la Capitale Nationale, Québec, Canada
| | - Danielle Laurin
- Faculté de Pharmacie, Université Laval, Québec, QC, Canada
- Centre d'excellence sur le Vieillissement de Québec, Centre Intégré Universitaire de Santé et de Services Sociaux de la Capitale Nationale, Québec, Canada
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Goulamhoussen N, Slapcoff L, Baran D, Boucher A, Houde I, Masse M, Albert M, Marsolais P, Cardinal H, Bouchard J. Factors Associated With the Use of Hypothermic Machine Perfusion in Kidney Transplant Recipients: A Multicenter Retrospective Cohort Study. Can J Kidney Health Dis 2022; 9:20543581211048338. [PMID: 36062213 PMCID: PMC9434662 DOI: 10.1177/20543581211048338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 09/06/2021] [Indexed: 11/24/2022] Open
Abstract
Background: Delayed graft function (DGF) is associated with an increased risk of graft
loss. The use of cold hypothermic machine perfusion (HMP) has been shown to
reduce the incidence of DGF in kidney transplant recipients (KTRs),
especially when extended-criteria donors (ECDs) are used. HMP can also
improve graft survival. However, there is a paucity of data on the
determinants of HMP use in clinical practice. Objective: We aimed to determine the factors associated with the use of HMP in a cohort
of donors and KTRs. Design: Multicenter retrospective cohort study. Setting: 5 transplant centers in Quebec. Patients: 159 neurologically deceased donors (NDD) and 281 KTR. Measurements: Use of HMP. Methods: We collected data on consecutive NDD admitted to a dedicated donor unit in a
single university-affiliated center and their KTRs between June 2013 and
December 2018 in 5 adult transplant centers across the province of Quebec,
Canada. All organs were recovered in a single hospital center where a HMP
device was available for every organ recovered and the decision to use HMP
was left at the discretion of the procurement surgeon. Generalized
estimating equations were used to predict the use of HMP. Results: The cohort included 159 NDDs and their 281 KTRs. Thirty-three percent of
donors were ECDs, and 59% of KTRs received organs placed on HMP. The median
cold ischemia time (CIT) was 12.5 (IQR 7.9-16.3) hours. In univariate
analysis, none of the donors’ characteristics were associated with the use
of HMP. ECD represented 33% of KTR on HMP vs 35% of those not placed on HMP
(P = .77). In univariate analysis, the use of HMP was
associated with KTR race (non-Caucasian), longer CIT, use of
basiliximab/alemtuzumab, year of transplant, and transplant center. The use
of HMP varied largely across transplant centers, ranging from 15% to 82%. In
multivariate analysis, use of HMP was associated with longer CIT (odds ratio
[OR] 1.15, 95% confidence interval [CI] = 1.07-1.25), transplant center as
well as transplantations performed after 2013. Limitations: One dedicated donor unit including NDD only, absence of specific data on
surgeons’ experience and personal or logistic reasons for using or not
HMP. Conclusions: We found that use of HMP remains low and varies largely across transplant
centers. The use of HMP was strongly associated with the transplant center
where the surgeons practiced, suggesting that surgeon preference/training
plays an important role in determining the use of HMP. Availability of HMP
at the time of organ procurement might also be limited by logistic issues
such as difficulty in returning the device. Further studies aimed at
determining the reasons underlying the barriers precluding the use of HMP
could help increasing its use and improve transplant outcomes.
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Affiliation(s)
- Nadir Goulamhoussen
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, QC, Canada
| | - Lawrence Slapcoff
- Department of Medicine, McGill University Health Centre, McGill University, Montreal, QC, Canada
| | - Dana Baran
- Department of Medicine, McGill University Health Centre, McGill University, Montreal, QC, Canada
| | - Anne Boucher
- Department of Medicine, Hôpital Maisonneuve-Rosemont, Université de Montréal, QC, Canada
| | - Isabelle Houde
- Department of Medicine, Centre Hospitalier Universitaire de Québec, QC, Canada
| | - Mélanie Masse
- Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, QC, Canada
| | - Martin Albert
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, QC, Canada
| | - Pierre Marsolais
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, QC, Canada
| | - Heloïse Cardinal
- Research center, Centre Hospitalier de l’Université de Montréal, Université de Montréal, QC, Canada
| | - Josée Bouchard
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, QC, Canada
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Masse M, Douzé L, Perez M, Cuvelier E, Henry H, Odou P, Pelayo S, Décaudin B. [Evaluation of the training of clinical pharmacy residents in prescription analysis using an ergonomic approach]. Ann Pharm Fr 2021; 80:187-199. [PMID: 33992642 DOI: 10.1016/j.pharma.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/26/2021] [Accepted: 05/06/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To perform an ergonomic intervention using the methodology of the analysis of the activity of the training process of clinical pharmacy residents in the analysis of prescriptions. METHODS The evaluation was carried out over two semesters: from May to October 2016 (first study) and from November 2016 to April 2017 (second study). The interviews and observations were conducted by an ergonomist who is an expert in this type of evaluation. The first study was based on observations of the training process and interviews at different time. The second study allowed to support pharmacists and evaluate the changes following the recommendations of the previous study. RESULTS A total of 6 and 9 residents participated in the first and second study, respectively. During the first study, 6 difficulties were raised which allowed implementation decisions. Feedback from residents on the training process was generally positive for the first part of the training but negative for the last part. The average number of fears expressed by the residents was higher at the beginning (2.9 fears) than at the end (1 fear). CONCLUSIONS The training process has been adapted to the expectations and feelings of the residents. Follow-up at the beginning and throughout the internship was essential. The next stage of this work will be to evaluate the contribution of the dashboards for monitoring clinical pharmacy skills in the new degree for hospital pharmacy.
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Affiliation(s)
- M Masse
- ULR 7365 - GRITA - groupe de Recherche sur les formes injectables et les technologies associées, université de Lille, CHU de Lille, 59000 Lille, France.
| | - L Douzé
- Inserm, CIC-IT/Evalab 1403 - centre d'investigation clinique, EA 2694, université de Lille, CHU de Lille, 59000 Lille, France
| | - M Perez
- CHU de Lille, institut de pharmacie, 59000 Lille, France
| | - E Cuvelier
- ULR 7365 - GRITA - groupe de Recherche sur les formes injectables et les technologies associées, université de Lille, CHU de Lille, 59000 Lille, France
| | - H Henry
- ULR 7365 - GRITA - groupe de Recherche sur les formes injectables et les technologies associées, université de Lille, CHU de Lille, 59000 Lille, France
| | - P Odou
- ULR 7365 - GRITA - groupe de Recherche sur les formes injectables et les technologies associées, université de Lille, CHU de Lille, 59000 Lille, France
| | - S Pelayo
- Inserm, CIC-IT/Evalab 1403 - centre d'investigation clinique, EA 2694, université de Lille, CHU de Lille, 59000 Lille, France
| | - B Décaudin
- ULR 7365 - GRITA - groupe de Recherche sur les formes injectables et les technologies associées, université de Lille, CHU de Lille, 59000 Lille, France
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Lanthier L, Masse M, Plourde MÉ, Cauchon M. [In patients with moderate chronic kidney disease with albuminuria, including non-diabetic patients, does dapagliflozin provide renal and cardiovascular benefit compared to placebo?]. Rev Med Interne 2020; 42:65-66. [PMID: 33309055 DOI: 10.1016/j.revmed.2020.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 11/08/2020] [Indexed: 11/17/2022]
Affiliation(s)
- L Lanthier
- Département de médecine spécialisé, service de médecine interne générale, université de Sherbrooke, Sherbrooke, QC, Canada.
| | - M Masse
- Département de médecine spécialisé, service de néphrologie, université de Sherbrooke, Sherbrooke, QC, Canada
| | - M-É Plourde
- Département de médecine nucléaire et radiobiologie, service de radio-oncologie, université de Sherbrooke, Sherbrooke, QC, Canada
| | - M Cauchon
- Département de médecine familiale et de médecine d'urgence, université Laval, Québec, QC, Canada
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Cardinal H, Lamarche F, Grondin S, Marsolais P, Lagacé AM, Duca A, Albert M, Houde I, Boucher A, Masse M, Baran D, Bouchard J. Organ donor management and delayed graft function in kidney transplant recipients: A multicenter retrospective cohort study. Am J Transplant 2019; 19:277-284. [PMID: 30253052 DOI: 10.1111/ajt.15127] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/19/2018] [Accepted: 09/19/2018] [Indexed: 01/25/2023]
Abstract
Meeting donor management goals (DMGs) has been reported to decrease the incidence of delayed graft function (DGF) after kidney transplant, but whether this relationship is independent of cold machine perfusion is unclear. We aimed to determine whether meeting DMGs is associated with a reduced incidence of DGF, independent of the use of machine perfusion. We collected data on consecutive brain-dead donors and their KT recipients (KTRs) between June 2013 and December 2016 in 5 adult transplant centers. We evaluated whether DMGs were met at donor neurologic death (DND) and later time points. We defined a priori meeting optimal DMG as achieving ≥7 DMGs. Generalized estimating equations were used to predict DGF. Among 122 donors, 34% were extended-criteria donors (ECDs). The number of DMGs met increased over time (5.6 ± 1.4 at DND and 6.1 ± 1.3 at organ procurement [P < .001]). DGF occurred in 23% of 214 KTRs, and 55% received organs placed on machine perfusion. In multivariate analysis, ECD (odds ratio [OR] 2.24, 95% confidence interval [CI] 1.13-4.45), use of machine perfusion (OR 0.45, 95% CI 0.22-0.94), and optimal DMG at DND (OR 0.39, 95% CI 0.16-0.99) were associated with DGF. Early achievement of DMGs was associated with a reduced risk of the development of DGF, independent of the use of machine perfusion.
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Affiliation(s)
- Heloise Cardinal
- Department of Medicine, Centre Hospitalier Universitaire de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Florence Lamarche
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Stéphanie Grondin
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Pierre Marsolais
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Anne-Marie Lagacé
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Anatolie Duca
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Martin Albert
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Isabelle Houde
- Department of Medicine, Centre Hospitalier Universitaire de Québec, Quebec City, Quebec, Canada
| | - Anne Boucher
- Department of Medicine, Hôpital Maisonneuve-Rosemont, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Mélanie Masse
- Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbroooke, Quebec, Canada
| | - Dana Baran
- Department of Medicine, McGill University Health Centre, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Josée Bouchard
- Department of Medicine, Hôpital du Sacré-Coeur de Montréal, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
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Bernard L, Bourdeaux D, Pereira B, Azaroual N, Barthélémy C, Breysse C, Chennell P, Cueff R, Dine T, Eljezi T, Feutry F, Genay S, Kambia N, Lecoeur M, Masse M, Odou P, Radaniel T, Simon N, Vaccher C, Verlhac C, Yessad M, Décaudin B, Sautou V. Analysis of plasticizers in PVC medical devices: Performance comparison of eight analytical methods. Talanta 2016; 162:604-611. [PMID: 27837878 DOI: 10.1016/j.talanta.2016.10.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/30/2016] [Accepted: 10/05/2016] [Indexed: 10/20/2022]
Abstract
A wide variety of medical devices (MDs) used in hospitals are made of flexible plasticized polyvinylchloride (PVC). Different plasticizers are present in variable amounts in the PVC matrix of the devices and can leach out into the infused solutions and may enter into contact with the patients. The ARMED1 project aims to assess the migration of these plasticizers from medical devices and therefore the level of exposure in patients. For the first task of the project, eight methods were developed to directly detect and quantify the plasticizers in the PVC matrix of the MDs. We compared the overall performances of the analytical methods using standardized and validated criteria in order to provide the scientific community with the guidance and the technical specifications of each method for the intended application. We have shown that routine rapid screening could be performed directly on the MDs using the FTIR technique, with cost-effective analyses. LC techniques may also be used, but with limits and only with individual quantification of the main plasticizers expected in the PVC matrix. GC techniques, especially GC-MS, are both more specific and more sensitive than other techniques. NMR is a robust and specific technique to precisely discriminate all plasticizers in a MD but is limited by its cost and its low ability to detect and quantify plasticizer contamination, e.g. by DEHP. All these results have been confirmed by a real test, called the " blind test " carried out on 10 MD samples.
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Affiliation(s)
- L Bernard
- CHU Clermont-Ferrand, Pôle Pharmacie, rue Montalembert, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France.
| | - D Bourdeaux
- CHU Clermont-Ferrand, Pôle Pharmacie, rue Montalembert, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - B Pereira
- CHU Clermont-Ferrand, Unité de Biostatistiques, Délégation Recherche Clinique & Innovation, F-63000 Clermont-Ferrand, France
| | - N Azaroual
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - C Barthélémy
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - C Breysse
- Centre de Ressources Technologiques 3s'Inpack, 63173 Aubière cedex, France
| | - P Chennell
- CHU Clermont-Ferrand, Pôle Pharmacie, rue Montalembert, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - R Cueff
- Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - T Dine
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - T Eljezi
- Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - F Feutry
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - S Genay
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - N Kambia
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - M Lecoeur
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - M Masse
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France; CHU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - P Odou
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France; CHU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - T Radaniel
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - N Simon
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France; CHU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - C Vaccher
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - C Verlhac
- Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - M Yessad
- Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
| | - B Décaudin
- University Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France; CHU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - V Sautou
- CHU Clermont-Ferrand, Pôle Pharmacie, rue Montalembert, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, EA 4676 C-BIOSENSS, BP 10448, F-63000 Clermont-Ferrand, France
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Abstract
Background: Trichodysplasia spinulosa (TS) is a rare skin affection seen in immunocompromised patients, mainly those with solid organ tranplants. Objective: To report a case of a patient with classic clinical and pathologic findings for the disease so that physicians caring for this population are aware of the clinical presentation. Method: We report the case of a female patient we saw at our clinic with a diagnosis of TS. Results: The diagnosis of TS was confirmed by pathologic findings. Conclusion: TS should be considered in any immunocompromised patient with a papular facial eruption reminiscent of acne vulgaris and with keratotic spiny papules as a distinctive feature.
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Affiliation(s)
- Alexandre Laroche
- Faculté de Médecine et des Sciences de la Santé
- Department of Microbiology and Infectiology, CHU Sherbrooke
- Department of Pathology, CHU Sherbrooke
- Department of Medicine, Service of Nephrology, CHU Sherbrooke
- Department of Medicine, Service of Dermatology, CHU Sherbrooke, Université de Sherbrooke, Sherbrooke, QC
| | - Catherine Allard
- Faculté de Médecine et des Sciences de la Santé
- Department of Microbiology and Infectiology, CHU Sherbrooke
- Department of Pathology, CHU Sherbrooke
- Department of Medicine, Service of Nephrology, CHU Sherbrooke
- Department of Medicine, Service of Dermatology, CHU Sherbrooke, Université de Sherbrooke, Sherbrooke, QC
| | - Myrna Chababi-Atallah
- Faculté de Médecine et des Sciences de la Santé
- Department of Microbiology and Infectiology, CHU Sherbrooke
- Department of Pathology, CHU Sherbrooke
- Department of Medicine, Service of Nephrology, CHU Sherbrooke
- Department of Medicine, Service of Dermatology, CHU Sherbrooke, Université de Sherbrooke, Sherbrooke, QC
| | - Mélanie Masse
- Faculté de Médecine et des Sciences de la Santé
- Department of Microbiology and Infectiology, CHU Sherbrooke
- Department of Pathology, CHU Sherbrooke
- Department of Medicine, Service of Nephrology, CHU Sherbrooke
- Department of Medicine, Service of Dermatology, CHU Sherbrooke, Université de Sherbrooke, Sherbrooke, QC
| | - Janie Bertrand
- Faculté de Médecine et des Sciences de la Santé
- Department of Microbiology and Infectiology, CHU Sherbrooke
- Department of Pathology, CHU Sherbrooke
- Department of Medicine, Service of Nephrology, CHU Sherbrooke
- Department of Medicine, Service of Dermatology, CHU Sherbrooke, Université de Sherbrooke, Sherbrooke, QC
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Marpaux N, Naegelen C, Masse M, Morel P. Application d’une méthode de résolution de problème au contrôle qualité (CQ) des produits sanguins labiles (PSL)… Valeur ajoutée imputable directement aux procédés de préparation. Transfus Clin Biol 2013. [DOI: 10.1016/j.tracli.2013.03.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Affiliation(s)
- François Mosimann
- Surgery Division, University of Sherbrook, Sherbrook, Québec, Canada
| | - Mélanie Masse
- Department of Nephrology, University of Sherbrook, Sherbrook, Québec, Canada
| | - Mathieu Brunet
- Surgery Division, University of Sherbrook, Sherbrook, Québec, Canada
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10
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Affiliation(s)
- Shana Balfour
- Service de Néphrologie, Hôpital Georges-Dumont, Moncton, NB, Canada
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11
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Bilodeau JF, Montambault P, Wolff JL, Lemire J, Masse M. Evaluation of Tolerability and Ability to Increase Immunosuppression in Renal Transplant Patients Converted From Mycophenolate Mofetil to Enteric-Coated Mycophenolate Sodium. Transplant Proc 2009; 41:3683-9. [DOI: 10.1016/j.transproceed.2009.06.183] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Accepted: 06/24/2009] [Indexed: 11/29/2022]
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Andreu G, Angué M, Calot J, Coffe C, Cotte C, David C, Ferrer-Lecœur F, Fontaine O, Gaschard P, Girard A, Hardy E, Hau F, Masse M, Michel M, Royer D, Schooneman F, Vicariot M, Villard F, Waller C. Why Choose Apheresis Platelet Concentrates? Transfus Med Hemother 2009. [DOI: 10.1159/000223324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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13
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Akman A, Masse M, Mihci E, Richard G, Christiano AM, Balle BJ, Ciftcioglu MA, Alpsoy E. Progressive symmetrical erythrokeratoderma: report of a Turkish family and evaluation for loricrin and connexin gene mutations. Clin Exp Dermatol 2008; 33:582-4. [DOI: 10.1111/j.1365-2230.2008.02728.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Chabanel A, Carrat F, Begue S, Masse M, Perrault MP, Andreu G. Quality of leucoreduced red blood cell concentrates: 5 years of follow-up in France. Vox Sang 2007; 94:41-7. [DOI: 10.1111/j.1423-0410.2007.00981.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cardinal H, Hébert MJ, Rahme E, Houde I, Baran D, Masse M, Boucher A, Le Lorier J. Modifiable factors predicting patient survival in elderly kidney transplant recipients. Kidney Int 2005; 68:345-51. [PMID: 15954926 DOI: 10.1111/j.1523-1755.2005.00410.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Elderly transplant candidates represent an increasingly important group on the waiting list for kidney transplantation. Yet the factors that determine posttransplantation outcomes in this population remain poorly defined. METHODS We performed a population-based retrospective cohort study involving all patients aged 60 years or older who received a first cadaveric kidney transplantation between 1985 and 2000 in the province of Quebec. The main outcomes were patient survival, overall graft survival, and treatment failure (patient death or graft loss within the first posttransplant year). Survival analyses were performed using a Cox proportional hazard model. Logistic regression identified factors predicting treatment failure. RESULTS On multivariate analysis, the modifiable factors associated with patient survival were active smoking at transplantation [hazard ratio (HR) 2.09, 95% confidence interval (CI) 1.22-3.60)], body mass index (BMI) (HR 1.34 for a 5-point increase, 95% CI 1.05-1.67), and time on dialysis before transplantation (HR 1.10 for a 1-year increase, 95% CI 1.02-1.18). The only modifiable factor associated with graft survival was active smoking at transplantation (HR 2.04, 95% CI 1.24-3.30). Treatment failure was associated with time on dialysis before transplantation (odds ratio for dialysis >/=2 years 3.28, 95% CI 1.34-7.9). CONCLUSION Our results show that active smoking, obesity, and time on dialysis before transplantation are modifiable risk factors associated with an increased risk of mortality after transplantation in elderly recipients. They represent potential targets for interventions aimed at improving patient and graft survival in elderly patients.
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Affiliation(s)
- Héloise Cardinal
- Nephrology Department, Centre Hospitalier de l'Université de Montréal, Université de Montréal, Montréal, Quebec, Canada
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Chabanel A, Sensebe I, Masse M, Maurel JP, Plante J, Hivet D, Kannengiesser C, Naegelen C, Joussemet M, marchesseau B, Rasongles P, Proust F, David C, Montembault AM, Bergea P. Quality assessment of seven types of fresh-frozen plasma leucoreduced by specific plasma filtration. Vox Sang 2003. [DOI: 10.1046/j.1423-0410.2003.00369.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Abstract
BACKGROUND Cardiovascular disease (CVD) is the leading cause of death in patients with end-stage renal disease (ESRD). Disregulation of apoptosis within the vessel wall and upregulation of the Fas/Fas-ligand (Fas-L) system contribute to the development of atherosclerosis. Cross-sectional studies have suggested that elevated plasma levels of the soluble form of Fas (sFas) are associated with CVD. However, the role of sFas and sFas-L in predicting future cardiovascular events has yet to be defined. METHODS We evaluated the role of plasma sFas and sFas-L levels as predictors of CVD in a prospective cohort of 107 chronic hemodialysis patients. RESULTS During the study period (27 months), 53 patients (49.5%) presented with at least one cardiovascular end point. On univariate analysis, baseline sFas levels were significantly associated with the occurrence of cardiovascular end points, whereas sFas-L levels were not. Using Cox proportional hazards, increased sFas levels were associated with a significantly greater risk for cardiovascular end points (P = 0.03). This effect was independent of baseline CVD history, classic risk factors for atherosclerosis (diabetes, hypercholesterolemia, hypertension, and smoking), and markers of inflammation (C-reactive protein [CRP], soluble intercellular adhesion molecule-1). Increased CRP levels also were associated with cardiovascular end points (P = 0.04). In addition, increased cardiovascular mortality was found in patients in the highest sFas tertile compared with those in the lowest tertile (27.8% versus 8.6%; P = 0.04). CONCLUSION Increased plasma sFas levels are predictive of future CVD. These results suggest that sFas is a novel and independent predictor of active atherosclerotic disease in patients with ESRD.
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Affiliation(s)
- Stéphan Troyanov
- Division of Nephrology, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Canada
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18
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Chabanel A, Sensebé I, Masse M, Maurel JP, Plante J, Hivet D, Kannengiesser C, Naegelen C, Joussemet M, Marchesseau B, Rasongles P, Proust F, David C, Montembault AM, Bergeat P. Quality assessment of seven types of fresh-frozen plasma leucoreduced by specific plasma filtration. Vox Sang 2003; 84:308-17. [PMID: 12757505 DOI: 10.1046/j.1423-0410.2003.00288.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVES A study was undertaken to determine plasma quality after specific filtration. MATERIALS AND METHODS Seven types of plasma were tested, after filtration of plasma from filtered or non-filtered whole blood. Leucocyte counting was carried out after a 30-fold concentration of the sample. Twenty-nine parameters (including coagulation testing, proteins, coagulation factors and activation markers) were measured before and after filtration, and after 6 months of storage. RESULTS After specific plasma filtration, the average residual leucocyte counts were less than 2250/l. In spite of small statistically significant changes in proteins, coagulation factors and complement activation, this study showed that plasma filtration did not alter plasma quality. After 6 months of storage at -30 degrees C, factor VIII recovery varied between 91 and 109%. Haemostasis parameters and activation markers remained within the normal range. CONCLUSIONS Specific plasma filtration reduced the leucocyte number to < 104 leucocytes/l. The quality of plasma was not altered by the additional step of specific plasma filtration.
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Affiliation(s)
- A Chabanel
- Etablissement Français du Sang, Paris, France.
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19
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Boucher A, Masse M, Lauzon L, Morin M, Dandavino R. Impact of immunosuppressive regimen on cardiovascular risk factors in kidney transplant recipients. Transplant Proc 2002; 34:1799-802. [PMID: 12176582 DOI: 10.1016/s0041-1345(02)03083-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- A Boucher
- Department of Nephrology, Hôpital Maisonneuve-Rosemont, Université de Montréal, 5415 boul l'Assumption, Montreal, Québec, Canada H1T 2M4
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20
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Masse M, Hébert MJ, Troyanov S, Vigneault N, Sirois I, Madore F. Soluble Fas is a marker of peripheral arterial occlusive disease in haemodialysis patients. Nephrol Dial Transplant 2002; 17:485-91. [PMID: 11865097 DOI: 10.1093/ndt/17.3.485] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Peripheral arterial occlusive disease (PAOD) including lower-extremity and cerebrovascular atherosclerosis is a leading cause of morbidity in haemodialysis patients. Recent evidence suggests that the expression of Fas, a molecule implicated in the initiation of apoptosis in various cell types, is increased at sites of atherosclerotic plaques. However, the significance of plasma levels of the soluble form of Fas (sFas) as a marker of peripheral arterial disease has yet to be defined. METHODS The present report is based on a cross-sectional analysis of baseline data from an ongoing prospective study designed to evaluate the role of sFas as marker of PAOD in end-stage renal disease (ESRD). We evaluated the association between sFas levels and evidence of PAOD in a cohort of 107 chronic haemodialysis patients. RESULTS Compared with subjects without evidence of disease (n=56), subjects with PAOD (n=51) had significantly higher plasma levels of sFas (30.0+/-8.9 vs 26.4+/-9.5 ng/ml; P=0.04). Using multiple regression, sFas was found to be associated with PAOD independently of classical risk factors for atherosclerosis (hypercholesterolaemia, diabetes, hypertension, and smoking), markers of inflammation (e.g. C-reactive protein, intercellular cell adhesion molecule type 1), and other risk factors (e.g. age, gender). An increase of one quintile in the plasma concentration of sFas was associated with an odds ratio of PAOD of 1.69 (95% CI: 1.09--2.63, P=0.01). In addition, models that incorporated sFas were significantly better at predicting PAOD than models limited to classical risk factors for atherosclerosis, alone or in combination with CRP levels (P=0.01). CONCLUSIONS Increased plasma levels of sFas are associated with established PAOD. These results suggest that sFas may represent a novel and independent marker of atherosclerosis.
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Affiliation(s)
- Mélanie Masse
- Division of Nephrology, CHUS, Université de Sherbrooke, Montréal, Québec, Canada
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21
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Hébert MJ, Masse M, Vigneault N, Sirois I, Troyanov S, Madore F. Soluble Fas is a marker of coronary artery disease in patients with end-stage renal disease. Am J Kidney Dis 2001; 38:1271-6. [PMID: 11728960 DOI: 10.1053/ajkd.2001.29224] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Coronary artery disease (CAD) is the leading cause of death in patients with end-stage renal disease (ESRD). Recent evidence suggests that the expression of Fas, a molecule implicated in the initiation of apoptosis in various cell types, is increased at sites of atherosclerotic plaques. However, the significance of plasma levels of the soluble form of Fas (sFas) and its ligand (sFas-L) as markers of atherosclerosis has yet to be defined. The present report is a cross-sectional analysis of baseline data from an ongoing prospective study designed to evaluate the role of sFas and sFas-L as markers of CAD in ESRD. We evaluated the association between plasma levels of sFas and sFas-L and evidence of CAD in a cohort of 107 chronic hemodialysis patients. Plasma levels of sFas were significantly greater (P = 0.04) among subjects with (n = 64) than without evidence of CAD (n = 43). Plasma levels of sFas-L were similar in both groups. Using multivariate analysis, sFas level was found to be independently associated with CAD (P = 0.01) after adjustment for classic risk factors for CAD (hyperlipidemia, diabetes, hypertension, and smoking), markers of inflammation (C-reactive protein [CRP], intercellular adhesion molecule 1), and other confounders. An increase of one quintile in plasma concentration of sFas was associated with an odds ratio for CAD of 1.64 (95% confidence interval, 1.11 to 2.41). Models that incorporated sFas were significantly better at identifying patients with CAD than models limited to classic risk factors for atherosclerosis, alone (P = 0.008) or in combination with CRP levels (P = 0.006). In summary, increased plasma levels of sFas are associated with CAD in stable patients with ESRD. These results suggest that sFas may represent a novel and independent marker of CAD.
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Affiliation(s)
- M J Hébert
- Division of Nephrology, Centre Hospitalier de l'Université de Montréal, Hôpital du Sacré-Coeur de Montréal, QC, Canada
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22
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Coffe C, Benguella M, Domy M, Cottier D, Guignier F, N'gondara JP, Carrère A, Masse M, Naegelen C, Biggio B, Tiberghien P, Hervè P, Bouzgarrou R, Maurel JP, Vezon G, Vidal M, Quainon F, Benamara A, Lamy B, Beaumont JL, Bierling P, Gondrexon G, Schooneman F, Janot C, Villard F, Huart JJ. Plateletpheresis concentrates produced with the COMTEC cell separator: the French experience. Transfus Apher Sci 2001; 25:67-72. [PMID: 11791767 DOI: 10.1016/s1473-0502(01)00089-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The latest generation of cell separators such as Trima (Gambro), Amicus (Baxter) and AS-TEC 204 (Fresenius), allow the collection of leucocyte-reduced platelet concentrates without secondary filtration. Fresenius has recently developed the COMTEC cell separator whose performance has been evaluated by several teams in France. This new cell separator is an improved version of the Fresenius AS-TEC 204 cell separator, designed to allow more efficient platelet collections. This study reports on the experience of six French teams (from Bordeaux, Clermont-Ferrand, Creteil, Dijon, Lille and Nancy) who obtained 696 leucocyte-reduced plateletpheresis concentrates in the course of collection using the new Fresenius COMTEC cell separator. All healthy volunteer donors fulfilled French selection criteria for platelet apheresis. Donors were eligible if they had suitable venous accesses, if their bodyweight was *50 kg and if their pre-apheresis platelet count was >150 x 10(9) l(-1). Between 4606 and 5229 ml of blood were processed. The mean volume of the platelet concentrates was between 439 and 493 ml (mean 460 +/- 63 ml). The platelet yield was of the order of 5.18 +/- 1.02 x 10(11) with only one platelet concentrate below the norm of 2 x 10(11) platelets (0.91 x 10(11)). No plausible explanation for this was found. The residual leucocyte levels conform to current norms. The platelet concentrates contained less than 1 x 10(6) leucocytes per concentrate (mean 0.233 +/- 0.150 x 10(6) leucocytes) in more than 97% of the components produced with >95% statistical confidence. The efficacy of the cell separator (52.44 +/- 7.35%) is comparable to that of other separators. The Fresenius COMTEC cell separator makes it possible to obtain leucocyte-reduced platelet concentrates which comply with current standards both in terms of platelet content and residual leucocyte level.
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Affiliation(s)
- C Coffe
- EFS Bourgogne Franche Comtè, Dijon Site, BP, France.
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23
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Abstract
Many countries in Europe and over the world are currently or will be concerned in the near future, by the implementation of universal leukoreduction (ULR) for red blood cells (RBC), platelets (PT) and now also for plasma. Recommended by several advisory committees, this decision to implement ULR must be considered as a recognition of the benefit of early leukocyte removal, and also as a precautionary measure to increase blood safety. The leukodepletion technology for RBC, PT and plasma has become increasingly more elaborated and integrated in the collection or in the component preparation process. To reach this aim and to assure that the end-products meet local specifications (1 or 5 x 10(6) residual leukocytes), a process control and validation program for leukoreduction has been described in the specific guidelines. Tested on a wide scale by a group of centers, flow cytometry is emerging as reference method for residual leukocyte enumeration. Validation protocols (linearity, precision, accuracy) have been defined in numerous national or international studies (PSL and BEST Working Party). The sensitivity of the method is greatly improved by concentration of the sample, with a detection limit equivalent to 10 cells/mL for RBC or PT, and 0.5 cells/mL for plasma. Furthermore, monitoring of the performance of the leukoreduction process includes a quality control program based on a general statistical model with a parametric or non parametric approach, sampling plan, ongoing control, process capability assessment, confidence limit, detection of failure, and estimation of the non conforming units rate.
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Affiliation(s)
- M Masse
- EFS Bourgogne-Franche-Comté, Besançon, France.
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24
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Masse M, Girardin C, Ouimet D, Dandavino R, Boucher A, Madore F, Hébert MJ, Leblanc M, Pichette V. Initial bone loss in kidney transplant recipients: a prospective study. Transplant Proc 2001; 33:1211. [PMID: 11267262 DOI: 10.1016/s0041-1345(00)02390-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- M Masse
- Service de néphrologie, Hôpital Maisonneuve-Rosemont and Université de Montréal, Montréal, Canada
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25
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Masse M, Gaillardetz C, Cron C, Abribat T. A new symmetry-based scoring method for posture assessment: evaluation of the effect of insoles with mineral derivatives. J Manipulative Physiol Ther 2000; 23:596-600. [PMID: 11145799 DOI: 10.1067/mmt.2000.110946] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND There is a need for a validated rapid procedure for the evaluation of posture, defined as lateral balance/imbalance at the pelvic, shoulder, and neck levels. This would enable clinicians to determine the importance of symmetry in the pathophysiology of musculoskeletal disorders and to assess the efficacy of devices and treatments claiming to normalize or improve posture. In this investigation, the efficacy of such a device, a set of insoles with a hypothesized proprioceptive-like action, was evaluated through use of the described procedure. OBJECTIVES To develop a new scoring system to evaluate body posture on the basis of symmetry and to use this scoring system to investigate the efficacy of insoles containing a combination of mineral derivatives designed to balance posture through a neurophysiological effect. METHODS The posture score was based on the evaluation of 4 postural parameters: pelvic and shoulder lateral balance/imbalance, static shoulder rotation, and amplitude of head rotation. In the placebo-controlled study, 32 patients were tested in a double-blind fashion, either with placebo insoles or with insoles containing mineral derivatives. The same study was repeated in unblind conditions in 137 patients selected from 2 chiropractic clinics in an open-label protocol. STUDY DESIGNS A crossover placebo-controlled, double-blind study and a multicenter, large-scale, open-label study in patients selected from chiropractic clinics. RESULTS A basal postural evaluation in 137 patients revealed that no patient had a perfect symmetry-ie, a perfectly or nearly perfectly balanced posture. The insoles with mineral derivatives induced a highly significant and similar improvement in the postural score in both the crossover double-blind study (32 patients; 56.7% improvement) and the open-label study (137 patients; 60.7% improvement, P < 0.001). CONCLUSIONS All patients tested and selected in chiropractic clinics exhibited asymmetries and postural imbalances according to the newly developed scoring method, and this method was successful in assessing the efficacy of insoles exerting a profound and immediate postural effect through a hypothesized neurophysiological mode of action.
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Affiliation(s)
- M Masse
- Desormeaux Chiropractic Clinic, Montreal, Quebec, Canada
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26
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Engelfriet CP, Reesink HW, Snyder EL, Dzik WH, Masse M, Naegelen C, Brand A, Williamson L, Knipe J, Bruce M, Woodfield DG, Sekiguchi S, Myllylä G, Sabliński J, Zupańska B. The official requirements for platelet concentrates. Vox Sang 2000; 75:308-17. [PMID: 9873268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- C P Engelfriet
- Central Laboratory of The Netherlands, Red Cross Blood Transfusion Service, Amsterdam
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27
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Affiliation(s)
- M Masse
- Nadine Marpaux for the PSL Working Party, Blood Transfusion Center Besançon, France.
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28
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Bégué S, Vidal-Obert M, Girard A, Perrault MP, Leroy MC, Masse M, Royer D, Peyrard T, Assens C, David C, Day B, Arzur C, Boudib C. [Quality control of labile blood products. Why and howto properly take a specimen? Labile Blood Products Group of the French Blood Transfusion Society]. Transfus Clin Biol 1999; 6:403-8. [PMID: 10666798 DOI: 10.1016/s1246-7820(00)88985-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This article reviews the various techniques of sampling used for the quality control of blood cell products. The importance of this stage for the validity of quality control results is emphasized. Three sampling methods, i.e., stripping, the sterile connection of sampling bag and the destructive method, are described in the form of operating modes and analyzed according to their advantages and drawbacks. The results of a comparative study carried out by the working group 'Blood Cell Products' of the French Society of Blood Transfusion are presented, showing that each method is valid and permits one to obtain a representative sample of the product to be controlled. Thus the diversity of the sampling methods allows us to select the one most adapted to the product to be controlled and to the analyses to be carried out afterward.
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Affiliation(s)
- S Bégué
- Etablissement de transfusion sanguine de Lyon, Miribel, France
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29
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Affiliation(s)
- G Andreu
- PSL group, Société Francaise de Transfusion Sanguine, Paris, France
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30
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Morel P, Naegelen C, Masse M, Lamy C, Leprat R, Talon D. [Surveillance of biocontamination of the environment of labile blood products: its role in a quality assurance program]. Transfus Clin Biol 1998; 5:251-9. [PMID: 9789964 DOI: 10.1016/s1246-7820(98)80403-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As part of a quality assurance approach aiming at reducing the risk of bacterial contamination of labile blood components (BC), their environment was submitted to a twofold quality control. A yearly control was carried out by the University Hospital Laboratory of Hygiene (UH-LH). Another control was regularly implemented by our Quality Control Laboratory. In accordance with this quality system, we focused our attention on decontamination procedures, control targets and the definition of an acceptable threshold. The analysis of results over 1 year showed that they can be considered as satisfactory when less than 40 CFU/100 cm2 are found. Quality sheets were developed, aimed at motivating our staff, adapting the decontamination procedures and initiating corrective measures. This quality programme allowed us to develop close collaboration links with the UH-LH and to play a role in the prevention of hospital-acquired infections.
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Affiliation(s)
- P Morel
- Etablissement de transfusion sanguine de Franche-Comté, Besançon, France
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31
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Masse M. 017-1 Méthodologie pour l'élaboration de référentiels qualité, applicables à la déleucocytation des globules rouges et des plaquettes d'aphérèse. Transfus Clin Biol 1998. [DOI: 10.1016/s1246-7820(98)80253-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Borderie VM, Kantelip BM, Genin PO, Masse M, Laroche L, Delbosc BY. Modulation of HLA-DR and CD1a expression on human cornea with low-dose UVB irradiation. Curr Eye Res 1996; 15:669-79. [PMID: 8670771 DOI: 10.3109/02713689609008908] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
PURPOSE To evaluate the effects of low-dose UVB irradiation of HLA and CD1a expression and the toxic effects of UVB on human corneas. METHODS 24 pairs of human corneas from 24 donors were studied. One cornea from each pair was randomly irradiated with UVB (100 mJ/cm2) after enucleation. All corneas were then organ-cultured for 2, 7, 14 or 21 days. Endothelium was studied after enucleation and organ culture. Following preservation, corneas were evaluated by means of light microscopy, morphometry and TEM. HLA and CD1a staining was performed using an immuno-alkaline-phosphatase technique. RESULTS Endothelial cell loss during organ culture averaged 9.1% in the UVB group and 9.2% in the control group (NS). The number of rosette and reformation figures (p = 0.004) and the coefficient of variation (p = 0.014) were higher in the control group. Epithelial sloughing was more accentuated in the UVB group. We observed the same moderate ultrastructural injuries in both groups. In the epithelium, the average number of HLA-DR+ cells per field was 0.12 in the UVB group and 0.42 in the control group (p = 0.035). In the stroma, these figures were respectively 1.04 and 1.34 (p = 0.026). In the epithelium, the average number of CD1a + cells was respectively 0. 025 and 0.078 (p = 0.019). In the preservation mediums, the average percentage of CD1a + cells was 0.07% in the UVB group and 0.27% in the control group (p = 0.014). CONCLUSIONS Low-dose UVB (100 mJ/cm2) decreases HLA-DR and CD1a expression of organ-cultured human corneas and induces moderate corneal injuries. Low-dose UVB might be useful for preventing allograft rejection.
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Affiliation(s)
- V M Borderie
- Service d'Ophtalmologie, Hôpital Saint Antoine, 184, rue du Fbg St-Antoine, 75571 Paris Cedex 12, France
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Prati D, Brandwein H, Capelli C, Dzik WH, Masse M, Myllylä G, Stromberg RR, Takahashi T, Vyas GN, Wenz B. Multicenter evaluation of the 3% paraformaldehyde method for white cell counting in leukocyte-reduced red blood cells. BEST (Biomedical Excellence for Safer Transfusion) Working Party of the International Society of Blood Transfusion. Vox Sang 1996; 70:241-5. [PMID: 9123935 DOI: 10.1111/j.1423-0410.1996.tb01338.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIM The 3% paraformaldehyde (PFA) method is a simple technique for counting residual white blood cells (WBC) in leukocyte-depleted red blood cells (RBC). Preliminary data suggested that its sensitivity is at least equal to PCR and flow cytometry. We report the results of a multicenter study conducted by the BEST Working Party to determine precision and accuracy of the 3% PFA method. STUDY DESIGN In the 7 participating laboratories, 5 sets of samples containing nominal concentrations of 200, 100, 50, and 10 WBC/ml were prepared by diluting whole blood into 'WBC-free' RBC. Ten milliliters of each sample were processed using the 3% PFA method, which is based on erythrocyte lysis and WBC concentration into 5% of the original sample volume; a Nageotte chamber is used to count concentrated WBC. RESULTS The precision of the technique varied according to the nominal concentration, ranging from a CV of 12% at 200 WBC/ml to 57% at 10 WBC/ml. The technique measured fewer than the nominal WBC concentrations (mean of all laboratories, -12.4%); underestimation was probably due to cell loss during sample manipulation. Overall accuracy was however acceptable, because statistical considerations establish that the actual WBC concentration would unlikely exceed 2 times the estimated count. CONCLUSIONS The 3% PFA method is suitable for the enumeration of residual WBC at concentrations > or = 50/ml. It represents a useful tool for evaluation of high performance filters by reference laboratories.
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Affiliation(s)
- D Prati
- Centro Trasfusionale e di Immunologia dei Trapianti, IRCCS Ospedale Maggiore, Milano, Italy
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Jordan L, Chandrasekaran M, Masse M, Bouquet G. Study of the Phase Transformations in Ni-Ti Based Shape Memory Alloys. ACTA ACUST UNITED AC 1995. [DOI: 10.1051/jp4:1995275] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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35
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Abstract
Efficiency of platelet transfusion is closely related to the quality of the preparation and also to the optimization of storage conditions at 20 degrees C. During this last years, processes for obtaining platelet suspensions became different (platelet rich plasma platelet, pooled or single buffy coat platelet, apheresis platelet), process for purification were developed (filtration, gamma or UV-irradiation, synthetic media for storage, virus inactivation), duration of storage was extended to 5 or 7 days and clinical applications were intensified. According to this advance, noted in some European countries, multicenter consensus on methods of quality control must be defined by different study groups. In the recent past, many publications have described a lot of in vitro tests for estimating functions, morphology, metabolic activity, lysis and activation of platelets. Current available methods for routine quality control or for development of new procedures, such as pH measurement inspection of swirling, percent of discoid shape, mean platelet volume, hypotonic shock response or total ATP level should be considered, in accordance with the in vivo viability.
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Affiliation(s)
- M Masse
- Centre Régional de Transfusion Sanguine, Besançon
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36
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Abstract
The precise measurement of low numbers of leukocyte below 0.1 WBC/microliter in filtered red cell or platelet suspensions meet both aims: to check the compliance with previously determined requirements and to evaluate the performances of novel filtering material (5 log depletion or more), justified by more and more important clinical use. The reliability of results, obtained with the chosen method, is ensured by applying of validation protocol, including training of technologist, assessment of the analytical range and the detection limit, assessment of precision and accuracy. The flow cytometry (FC) and Nageotte Chamber (NC) method are the both techniques which are currently used in routine Quality Control (QC) and validated by multicenter studies. Recent developments are made for increasing the sensibility of these counting methods, thanks to higher concentration or volume of the sample to be analysed. Among the experimental techniques, requiring more advances before implementing in QC program, quantitative PCR must become essential as reference method for evaluating the efficiency of filtration, in the future.
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Affiliation(s)
- M Masse
- Centre Régional de Transfusion Sanguine, Besançon
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37
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Reesink HW, Hanfland P, Hertfelder HJ, Scharf RE, Högman CF, Hoppe PA, Moroff G, Friedman LI, Masse M, Walsh TJ. International forum. What is the optimal storage temperature for whole blood prior to preparation of blood components. Vox Sang 1993; 65:320-7. [PMID: 8310685 DOI: 10.1111/j.1423-0410.1993.tb02174.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- H W Reesink
- Red Cross Blood Bank Amsterdam, The Netherlands
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38
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Abstract
The technique of filtration which has constantly been improved over past years makes it possible to obtain highly pure blood products (the rate of leukocyte depletion can reach 3 to 5 log). Several study groups (BEST, PSL) and international committees of experts have defined a number of standards with which leukocyte depleted blood products must comply. Assessment of filtration procedures is thus made necessary, it applies to the different steps of the filtration procedure: preparation techniques of red cell or platelet suspension, priming and rinsing of the filter. Likewise a number of parameters have to be checked: filtration time, temperature, age of suspensions. Moreover quality control procedures must be implemented, using adapted and validated measuring methods (Nageotte hemacytometer, for instance). The parameters to be monitored include the number of residual leukocytes, (mean value: 1 x 10(6), i.e. about 4 WBCs/microliters), and the rate of hemoglobin or platelet recovery. Any new filtering equipment or material must satisfy strict requirements and standards including clinically acceptable limits as part of the same quality approach. Validation, in this case, consists in determining the maximal leukocyte content which the filter can absorb (capacity) and the average rate of leukocyte removal (efficacy). The constant monitoring of filtration performance contributes to improving the quality of red blood cell or platelet suspensions and thus meet clinicians' requirements for their patients.
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39
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Coffe C, Couteret Y, Devillers M, Fest T, Hervé P, Kieffer Y, Lamy B, Masse M, Morel P, Pouthier-Stein F. First results obtained in France with the latest model of the Fresenius cell separator: AS 104. Transfus Sci 1993; 14:51-5. [PMID: 10148313 DOI: 10.1016/0955-3886(93)90054-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In Besançon, we carried out 40 plateletphereses with the latest model of the Fresenius cell separator AS 104 to check this new system against the new generation of cell separators, according to the following criteria: less than 2x10 6 leukocytes (before filtration) and more than 5x10 11 platelets. The results show that platelet concentrates contained 5.04+/-0.88x10 11 platelets in a total volume of 435+/-113 mL. The mean platelet recovery was 40.95+/-4.86% (from 31.7 to 51.6). The leukocyte content was 2.28+/-5.48x10 6 and the red blood cell contamination was 3.48+/-2.38x10 8. The quality of the platelets was very satisfactory. There was no problem with donor biocompatibility or procedure safety, few adverse donor reactions (0.6%) and good therapeutic efficiency of platelet concentrates.
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Affiliation(s)
- C Coffe
- Regional Blood Transfusion Centre, Besancon Cedex, France
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40
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Reesink H, Hanfland P, Hertfelder HJ, Scharf R, Högman C, Hoppe P, Moroff G, Friedman L, Masse M, Walsh T, Ala F, Pietersz R. What Is the Optimal Storage Temperature for Whole Blood Prior to Preparation of Blood Components. Vox Sang 1993. [DOI: 10.1159/000462450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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41
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Masse M, Naegelen C, Pellegrini N, Segier JM, Marpaux N, Beaujean F. Validation of a simple method to count very low white cell concentrations in filtered red cells or platelets. Transfusion 1992; 32:565-71. [PMID: 1502711 DOI: 10.1046/j.1537-2995.1992.32692367203.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The increased performance of white cell (WBC) filters makes it difficult to count precisely the number of residual WBCs. Concentrations as low as 0.01 WBC per microL cannot be determined with electronic cell counters, conventional hemocytometers, or the flow cytometric techniques currently being used. This article describes a simple, manual method using a Nageotte hemocytometer with a large-volume chamber (50 microL) to count the number of WBCs contained in red cell (RBC) suspensions (preparations A, B, and C) and in platelet suspensions (preparation D) diluted 1 in 10 pure, or concentrated two fold. To validate the method, several reference ranges, prepared by successively adding mononuclear cells to a suspension of pure RBCs or platelets, were used. Among the different series, validation ranges varied from 0.2 to 12 to 0.01 to 0.5 WBCs per microL and correlation coefficients ranged from 0.929 to 0.996. To determine the limit of accurate detection, accuracy tests (n = 160) were carried out by two experienced operators on samples with WBC concentrations of about 5, 10, and 120 times the concentration at the theoretical limit of detection (1 WBC/chamber). No significant difference was observed in the various types of preparations (A, B, C, D) in the tests performed by the two operators. However, intra-assay coefficients of variation were 18, 9.5, and 2.2 percent, respectively, at WBC concentrations of 5, 10, and 120 times that at the theoretical limit of detection. These observations show that a limit of accurate detection (10%) seems to be reached when 10 cells are observed in a Nageotte hemocytometer.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Masse
- Centre Régional de Transfusion Sanguine, Besançon, France
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42
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Masse M, Andreu G, Angue M, Babault C, Beaujean F, Bidet ML, Boudart D, Calot JP, Cotte C, Follea G. A multicenter study on the efficiency of white cell reduction by filtration of red cells. Transfusion 1991; 31:792-7. [PMID: 1755082 DOI: 10.1046/j.1537-2995.1991.31992094664.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To evaluate accurately the current performance of filtration, the French Produits Sanguins Labiles study group, composed of 21 transfusion teams, conducted a large-scale 6-month study involving over 1400 filtrations and 3000 controls. Some 745 standard red cell concentrates (RBC concentrates) and 690 concentrates previously white cell (WBC)-reduced by removal of buffy coat (BC-poor RBC concentrates) were filtered using six commercially available filters: at least 170 results were collected per filter, spread among a minimum of three teams. Prefiltration controls show that the removal (manual and automated) of the buffy coat results in an initial WBC reduction of approximately 63 percent, along with a hemoglobin loss of 4 g (7%). After filtration, residual WBCs were counted in the Nageotte manual counting chamber. The reliability of this counting method, which is simple and adapted to low WBC concentrations, was characterized in this study by a 25-percent coefficient of variation (CV) for a concentration of 2.5 WBCs per microL (i.e, 0.6 x 10(6) WBCs/filtered unit). The analysis of the results shows that, for five of six filters (1 filter was excluded), the postfiltration median value of residual WBCs was 1.1 x 10(6) in filtered RBC concentrates (n = 590), whereas it was 0.34 x 10(6) in filtered BC-poor RBC concentrates (n = 581). The difference is significant (p less than 10(-8), Wilcoxon test). Hemoglobin loss due to filtration varies according to the filter, from 5.7 +/- 2.2 to 17.3 +/- 2.5 g.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Masse
- Production and Control Department of the Angers, Besançon, France
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43
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Masse M. [Multicenter study on the efficacy of leukocyte depletion by filtration of red cells. The Labile Blood Products Group]. Rev Fr Transfus Hemobiol 1991; 34:77-92. [PMID: 2015037 DOI: 10.1016/s1140-4639(05)80090-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To determine the actual efficacy of red cells filtration technique, the "Labile Blood Component Production" french study group, including 21 blood centers, realized a large study on more than 1,400 filtrations and 3,000 controls. 745 units of red cell concentrates (RCC) and 690 units of buffy-coat poor red blood cells (BC PRBC) were filtered through 6 commercialized leukocytes depleting filters: not less than 170 experiments per filter, tested by 3 different blood centers. Pre-filtration controls prove that buffy-coat removal, done manually or with automated equipment, involves a first leukocytes depletion about 63% and an hemoglobin loss equal to 4 g (7%). After filtration, residual leukocytes counts were performed manually in a Nageotte counting chamber. In this study, we evaluated the reliability of this simple method which accurately measures very low leukocytes counts. The variation coefficient was 25% for 2.5 leukocytes/microliter concentration (O.6 x 10(6) per filtered unit). The results, obtained from 1200 evaluated filtrations, confirm that buffy-coat removal obviously improves the filtration performances (residual leukocytes level is lower than 1 x 10(6) per unit for 78% filtered BC PRBC versus 43% filtered RCC). Furthermore, 90% of overall filtered units are containing less than 5 x 10(6) leukocytes.
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Affiliation(s)
- M Masse
- Centre Régional de Transfusion Sanguine, Besançon
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44
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Masse M. [Quality control management. Application to the production of unstable blood components]. Rev Fr Transfus Immunohematol 1988; 31:747-56. [PMID: 3070708 DOI: 10.1016/s0338-4535(88)80082-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The quality controls of blood components, realised in Transfusion Centres, are necessary to check the true conformity of products in accordance with official standards. This controls are insufficient to enhance blood components quality. The practical application of the quality management allows us to reach this aim easier. After the quality display, after it efficiency and regulatory measurement and after a quality objectives selection, we consider that the professional training and the data presentation contribute to the necessary confidence for a better quality management. Finally, standardization and automatization of production processes constitute the only ways to improve the real quality, to decrease waste products and, of course, to increase the productivity.
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Affiliation(s)
- M Masse
- Unité de Production, Centre Régional de Transfusion Sanguine, Besançon
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45
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Bouquet G, Masse M, Missika JM, Portier R. [Research on a shape memory NiTi alloy. Orthodontic applications]. J Biomater Dent 1987; 3:207-15. [PMID: 3506942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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46
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Affiliation(s)
- J Gerota
- Centre de Transfusion-Hémobiologie Saint-Louis, Paris
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47
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Le Gall I, Chausse AM, Marcadet A, Millasseau P, Beaud'Huy-Lancelin D, Font MP, Paul P, Sayagh B, Masse M, Massart C. New methods for detection of HLA genes polymorphism useful for associated diseases studies. Pathol Biol (Paris) 1986; 34:801-7. [PMID: 3531998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We have studied in 22 informative families typed for HLA the segregation of DNA restriction fragments obtained with five restriction enzymes and hybridized with one class I and three class II probes. Most of the fragments correlate with serologically defined specificities. Many fragments can be grouped in clusters, whose genetic significance is discussed. The RFLP distribution in patients with insulin-dependent diabetes mellitus, multiple sclerosis or narcolepsy, three diseases known to be associated with some HLA-DR specificities, has been also studied. Many fragments allow to distinguish between patients and HLA-DR matched controls. Hybridization of genomic DNA with synthetic oligomers will refine moreover the understanding of the HLA system polymorphism.
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48
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Schmitthaeusler R, Malgras J, Mayer S, Masse M, Peters A. [Concentrated fractions of factor VIII]. Rev Fr Transfus Immunohematol 1983; 26:235-7. [PMID: 6410492 DOI: 10.1016/s0338-4535(83)80097-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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49
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Masse M, Blanchard R, Peters A. [Controlled centrifugation by a w2dt integrator. Application to blood transfusion]. Rev Fr Transfus Immunohematol 1982; 25:413-25. [PMID: 7146750 DOI: 10.1016/s0338-4535(82)80031-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The centrifugation constitutes a fundamental stage in the blood components preparation as fresh frozen plasma and platelets rich plasma. The measure of the total effect of centrifugation (VT) is achieved with an integrator "w2dt". This parameter characterizes, in an unique way, the preparation procedure of a blood component. The value VT is determined and then sticked on the integrator, which made the rotation stop as soon as the preselected effect of centrifugation is reached. Thanks to this accessory, the authors have analysed the relative importance of the three data: acceleration, constant speed and deceleration, on the total effect of centrifugation. This analysis has induced them to a new approach of the centrifugation. For the authors, the classic notion of rotation time at constant speed, become insufficient. In blood transfusion, several applications are possible. The authors have determined the optimal conditions of platelets rich plasma (yield higher than 80% during a minimum real time) and platelets concentrate preparation with two different centrifuges, Sorvall RC3B and Jouan K 110 SX, equipped with Sorvall Integrator. The reproductibility of the experiments is satisfying when the centrifuged weight is comparatively constant. The standardization of centrifugation technics will be easier when the rotation radius will be included in the calculation of the total effect of centrifugation, thanks to integration.
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50
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Herve P, Potron G, Droule C, Beduchaud MP, Masse M, Coffe C, Bosset JF, Peters A. Human platelets frozen with glycerol in liquid nitrogen: biological and clinical aspects. Transfusion 1981; 21:384-90. [PMID: 7268863 DOI: 10.1046/j.1537-2995.1981.21481275993.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Platelets were frozen using glycerol (3% in plasma) as a cryoprotective agent, a rapid cooling rate, and liquid nitrogen for storage. The cryopreserved platelets were thawed at 42 C and infused without washing. The results indicate that the quality of the thawed platelets is equivalent to platelets stored for 24 to 48 hours at room temperature. The availability of HLA phenotyped leukocyte poor platelets can reduce the frequency of sensitization to strong antigens and provide clinically effective platelets for alloimmunized patients.
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