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Marvaud JC, Bouttier S, Saunier J, Kansau I. Clostridioides difficile Flagella. Int J Mol Sci 2024; 25:2202. [PMID: 38396876 PMCID: PMC10889297 DOI: 10.3390/ijms25042202] [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: 01/16/2024] [Revised: 02/04/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
Clostridioides difficile is an important pathogen for humans with a lead in nosocomial infection, but it is also more and more common in communities. Our knowledge of the pathology has historically been focused on the toxins produced by the bacteria that remain its major virulence factors. But the dysbiosis of the intestinal microbiota creating the conditions for the colonization appears to be fundamental for our understanding of the disease. Colonization implies several steps for the bacteria that do or do not use their capacity of motility with the synthesis of flagella. In this review, we focus on the current understanding of different topics on the C. difficile flagellum, ranging from its genetic organization to the vaccinal interest in it.
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Affiliation(s)
- Jean-Christophe Marvaud
- Institut MICALIS, INRAE, AgroParisTech, Equipe Bactéries Pathogènes et Santé, Faculté de Pharmacie, Université Paris-Saclay, 91400 Orsay, France (I.K.)
| | - Sylvie Bouttier
- Institut MICALIS, INRAE, AgroParisTech, Equipe Bactéries Pathogènes et Santé, Faculté de Pharmacie, Université Paris-Saclay, 91400 Orsay, France (I.K.)
| | - Johanna Saunier
- Matériaux et Santé, Faculté de pharmacie, Université Paris Saclay, 91400 Orsay, France
| | - Imad Kansau
- Institut MICALIS, INRAE, AgroParisTech, Equipe Bactéries Pathogènes et Santé, Faculté de Pharmacie, Université Paris-Saclay, 91400 Orsay, France (I.K.)
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2
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Khzam A, Saunier J, Carpentier L, Mignot A, Tortolano L, Yagoubi N. Impact of lock solutions on the mechanical performance of polyurethane central venous catheters: A comparative study. Med Eng Phys 2023; 117:103994. [PMID: 37331749 DOI: 10.1016/j.medengphy.2023.103994] [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: 09/30/2022] [Revised: 02/14/2023] [Accepted: 05/12/2023] [Indexed: 06/20/2023]
Abstract
The impact of ethanol locks on the mechanical performances of central venous catheters was compared to that of aqueous-based locks. Several mechanical tests were performed to evaluate catheter behavior: kinking radius measurements, burst pressure, and tensile tests. Different polyurethanes were studied to assess the impact of radio-opaque charge and polymer chemical composition on catheter behavior. The results were correlated to swelling measurements and calorimetric measurements. In particular, ethanol locks have a higher impact on long contact time than aqueous-based locks: stresses and strains at break were lower, and kinking radii were higher. However, for all catheters, the mechanical performances remain much higher than the normative requirements.
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Affiliation(s)
- Afif Khzam
- Matériaux et Santé, UFR de pharmacie, Université Paris Saclay, France
| | - Johanna Saunier
- Matériaux et Santé, UFR de pharmacie, Université Paris Saclay, France.
| | | | | | - Lionel Tortolano
- Matériaux et Santé, UFR de pharmacie, Université Paris Saclay, France; Assistance Publique-Hôpitaux de Paris, Groupe hospitalier Henri Mondor, Department of Pharmacy, 51 Avenue du Maréchal de Lattre de Tassigny, Créteil, F-94010, France
| | - Najet Yagoubi
- Matériaux et Santé, UFR de pharmacie, Université Paris Saclay, France
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3
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Khzam A, Saunier J, Guilbaud M, Herry JM, Dazzi A, Tortolano L, Carpentier L, Mignot A, Yagoubi N. Surface properties and bacterial adhesion on polyurethane central catheters: Impact of ethanol lock solution. Biomater Adv 2023; 146:213281. [PMID: 36634377 DOI: 10.1016/j.bioadv.2023.213281] [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] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 12/08/2022] [Accepted: 01/02/2023] [Indexed: 01/09/2023]
Abstract
It was shown in the literature that ethanol locks have a positive effect on preventing catheter-related infections in patients with central venous catheters without causing any microbial resistance. However, ethanol is known to interact with polyurethanes. The consequences of this interaction on the catheter surface properties were studied as it can impact the biocompatibility of the material and the adhesion phenomena onto the surface. No physical and chemical degradation was put into evidence, but low molecular weight compounds such as additives were extracted from the catheter bulk or migrated and exudated onto its surface. Nevertheless, as far as bacterial adhesion is concerned, after the catheter was locked and the lock removed, the surface modifications promoted no adhesion.
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Affiliation(s)
- A Khzam
- Université Paris-Saclay, Faculté de pharmacie, Matériaux et Santé, 91400 Orsay, France
| | - J Saunier
- Université Paris-Saclay, Faculté de pharmacie, Matériaux et Santé, 91400 Orsay, France.
| | - M Guilbaud
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 91300 Massy, France
| | - J M Herry
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 91300 Massy, France
| | - A Dazzi
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405 Orsay, France
| | - L Tortolano
- Université Paris-Saclay, Faculté de pharmacie, Matériaux et Santé, 91400 Orsay, France; Department of Pharmacy, Henri Mondor Hospital, Créteil, France
| | | | | | - N Yagoubi
- Université Paris-Saclay, Faculté de pharmacie, Matériaux et Santé, 91400 Orsay, France
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4
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Khzam A, Saunier J, Carpentier L, Mignot A, Tortolano L, Yagoubi N. Surface and mechanical properties of polyurethane central venous catheters after repeated contact with chemotherapy excipient solutions. J Biomed Mater Res B Appl Biomater 2023; 111:1182-1196. [PMID: 36705442 DOI: 10.1002/jbm.b.35224] [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: 06/14/2022] [Revised: 12/05/2022] [Accepted: 12/23/2022] [Indexed: 01/28/2023]
Abstract
This article investigates the impact of the interactions between polyurethane central venous catheters and solutions containing excipients used in cisplatin and paclitaxel formulations. Changes to the properties of catheters and the leaching of catheter additives into the infused solutions were studied while these solutions were infused cyclically for several months. Chemotherapy treatment was mimicked in vitro in compliance with hospital practices. The treatment cycle was repeated 10 times, using solutions containing only the excipients. After 10 treatment cycles, no physical or chemical degradation of the catheter was observed. Mechanical performances were stable, but surface modifications occurred, causing the surface to become more hydrophobic. A loss in polyurethane antioxidant amount was observed in part due to a leaching phenomenon.
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Affiliation(s)
- Afif Khzam
- Matériaux et Santé, UFR de pharmacie, Université Paris-Saclay, Orsay, France
| | - Johanna Saunier
- Matériaux et Santé, UFR de pharmacie, Université Paris-Saclay, Orsay, France
| | | | | | - Lionel Tortolano
- Matériaux et Santé, UFR de pharmacie, Université Paris-Saclay, Orsay, France.,Department of Pharmacy, Assistance Publique-Hôpitaux de Paris, Groupe hospitalier Henri Mondor, Créteil, France
| | - Najet Yagoubi
- Matériaux et Santé, UFR de pharmacie, Université Paris-Saclay, Orsay, France
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5
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Saunier J, Khzam A, Yagoubi N. Impact of mechanical stress on flexible tubing used for biomedical applications: Characterization of the damages and impact on the patient's health. J Mech Behav Biomed Mater 2022; 136:105477. [PMID: 36219992 DOI: 10.1016/j.jmbbm.2022.105477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 07/27/2022] [Revised: 09/16/2022] [Accepted: 09/18/2022] [Indexed: 11/06/2022]
Abstract
Flexible tubing is a key part of a lot of medical devices used in hospital, but may be subjected to a lot of various mechanical stresses that can led to the failure or to complications for the patients. The nature and causes of these mechanical stresses were listed for peristaltic pump tubing, infusion set tubing and catheters. Their consequences in term of tubing damages and particular contamination were reported. The impact of the chemical nature of the tubing, of its size and also the impact of various parameters of the clinical acts were reviewed. Last the consequences for the patient's health were discussed.
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Affiliation(s)
- J Saunier
- Matériaux et Santé, Faculté de pharmacie, Université Paris Saclay, France.
| | - A Khzam
- Matériaux et Santé, Faculté de pharmacie, Université Paris Saclay, France
| | - N Yagoubi
- Matériaux et Santé, Faculté de pharmacie, Université Paris Saclay, France
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Tortolano L, Mrad O, Manerlax K, Khalfoun C, Yousfi R, Saunier J, Secretan P, Yagoubi N. Comparative stability of intraocular lenses during 2–20 years of artificial aging, potential effects in terms of biocompatibility. J Appl Polym Sci 2022. [DOI: 10.1002/app.52752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lionel Tortolano
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
- Department of Pharmacy Assistance Publique‐Hôpitaux de Paris, Groupe Hospitalier Henri Mondor Créteil France
| | - Omar Mrad
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
| | - Katia Manerlax
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
| | - Chaineze Khalfoun
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
| | - Rayane Yousfi
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
| | - Johanna Saunier
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
| | | | - Najet Yagoubi
- EA Matériaux et Santé Université Paris‐Saclay Châtenay‐Malabry France
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7
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Hadiouch S, Maresca M, Gigmes D, Machado G, Maurel-Pantel A, Frik S, Saunier J, Deniset-Besseau A, Yagoubi N, Michalek L, Barner-Kowollik C, Guillaneuf Y, Lefay C. A versatile and straightforward process to turn plastics into antibacterial materials. Polym Chem 2022. [DOI: 10.1039/d1py01344k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Antibacterial activity without cell cytotoxicity is conferred to common plastic materials by dispersion of amphiphilic cationic methacrylate-based block copolymers (0.5–2 wt%), while maintaining the mechanical properties of the materials.
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Affiliation(s)
- Slim Hadiouch
- Aix-Marseille Univ., CNRS, Institut de Chimie Radicalaire, UMR 7273, F-13397 Marseille, France
| | - Marc Maresca
- Aix Marseille Univ., CNRS, Centrale Marseille, iSm2, 13397 Marseille, France
| | - Didier Gigmes
- Aix-Marseille Univ., CNRS, Institut de Chimie Radicalaire, UMR 7273, F-13397 Marseille, France
| | - Guilherme Machado
- Aix Marseille Univ, CNRS, Centrale Marseille, LMA, Marseille, France
| | | | - Sabrina Frik
- Université Paris Saclay, UFR de pharmacie, Matériaux et Santé, 92290 Chatenay Malabry, France
| | - Johanna Saunier
- Université Paris Saclay, UFR de pharmacie, Matériaux et Santé, 92290 Chatenay Malabry, France
| | - Ariane Deniset-Besseau
- Institut de Chimie Physique (ICP), CNRS UMR 8000, Univ. of Paris-Sud, Université Paris-Saclay, Orsay, France
| | - Najet Yagoubi
- Université Paris Saclay, UFR de pharmacie, Matériaux et Santé, 92290 Chatenay Malabry, France
| | - Lukas Michalek
- Centre of Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Christopher Barner-Kowollik
- Centre of Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Yohann Guillaneuf
- Aix-Marseille Univ., CNRS, Institut de Chimie Radicalaire, UMR 7273, F-13397 Marseille, France
| | - Catherine Lefay
- Aix-Marseille Univ., CNRS, Institut de Chimie Radicalaire, UMR 7273, F-13397 Marseille, France
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Secretan PH, Thirion O, Saunier J, Razazi K, Paul M, Do B. [HOSPITAL COMPOUNDING TO FACE SHORTAGE: A CASE STUDY OF THE DEVELOPMENT OF A LOPINAVIR-RITONAVIR ORAL SUSPENSION DURING THE FIRST WAVE OF SARS-COV-2 IN FRANCE]. Ann Pharm Fr 2021; 80:273-279. [PMID: 34563517 PMCID: PMC8461001 DOI: 10.1016/j.pharma.2021.09.002] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/03/2021] [Accepted: 09/17/2021] [Indexed: 11/29/2022]
Abstract
The potential usefulness of lopinavir-ritonavir on Covid 19 infection during the first wave of contamination in France had boosted Kaletra® syrup prescription to the point of causing its national shortage. In the intensive care units of Parisian hospitals in charge of patients with life-threatening viral contamination, caregivers had to resort to lopinavir-ritonavir-based tablets, crushing them and then dispersing the powder in milk to facilitate administration by nasogastric tube. The difficulties and poor control of this degraded mode, which does not always ensure control of the amount of the drug in the prepared dose and may induce insufficient antiviral exposure, led us to develop in a very short time, while ensuring quality control proportional to the risk, a liquid form as an alternative to Kaletra® oral solution shortage. For this purpose, we describe this compounding formulation and its preparation process, while justifying the quality control strategy adapted to the risk as well as its chemical and physical stability. Based on the chemical and physical studies, the preparation was showed to be stable during at least 2 months between +2°C and +8°C and 1 week at room temperature. This has resulted in the design of kits that include multi-dose packaging and a measuring device and contain the appropriate quantities of drugs to ensure at least one week's treatment for each patient, during which time the kit in use can be stored at room temperature. The intensive care team used this treatment under conditions that they considered well adapted until the imported specialty became available.
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Affiliation(s)
- Philippe-Henri Secretan
- Paris Cardiovascular Research Centre, INSERM U970, Paris, France; Université Paris-Saclay, Matériaux et santé, 92296, Châtenay-Malabry, France.
| | - Olivier Thirion
- Department of Pharmacy, Henri Mondor Hospital, AP-HP, Créteil, France
| | - Johanna Saunier
- Université Paris-Saclay, Matériaux et santé, 92296, Châtenay-Malabry, France
| | - Keyvan Razazi
- Service de Médecine Intensive Réanimation, Henri Mondor Hospital, AP-HP, Créteil, France; INSERM U955, Univ Paris Est Créteil, Créteil, France; CARMAS, Univ Paris Est Créteil, Créteil, France
| | - Muriel Paul
- Department of Pharmacy, Henri Mondor Hospital, AP-HP, Créteil, France; EpidermE, Univ Paris Est Creteil, 94010 Creteil, France
| | - Bernard Do
- Université Paris-Saclay, Matériaux et santé, 92296, Châtenay-Malabry, France; Department of Pharmacy, Henri Mondor Hospital, AP-HP, Créteil, France
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9
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Saunier J, Yagoubi N. Investigating the static or dynamic flexural and compressive stresses on flexible tubing: Comparison of clamp and peristaltic pump impact on surface damages and particles leaching during infusion acts. J Mech Behav Biomed Mater 2021; 123:104737. [PMID: 34464902 DOI: 10.1016/j.jmbbm.2021.104737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/12/2021] [Revised: 07/21/2021] [Accepted: 07/27/2021] [Indexed: 11/29/2022]
Abstract
This paper deals with the impact of the mechanical stresses on plasticized PVC infusion tubing. Stresses due to clamping were compared to those due to the use of a peristaltic pump. The degradation of the inner surface of plastic tubing due to a dynamic load with repeated flexion and compression was extensively studied in the case of peristaltic pump stress during extracorporeal (EC) acts. Even if clamping results in a less repeated stress, we show it can also lead to damages on the inner lumen of the tubing, especially in static conditions. As these degradations were responsible of particle shedding in the case of EC processes, a first evaluation of particular contamination was performed on the stressed infusion tubes.
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Affiliation(s)
- J Saunier
- Matériaux et Santé, UFR de Pharmacie, Université Paris-Saclay, France.
| | - N Yagoubi
- Matériaux et Santé, UFR de Pharmacie, Université Paris-Saclay, France
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10
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Bernard M, Jubeli E, Bakar J, Saunier J, Yagoubi N. Impact of simulated biological aging on physicochemical and biocompatibility properties of cyclic olefin copolymers. Mater Sci Eng C Mater Biol Appl 2019; 97:377-387. [PMID: 30678923 DOI: 10.1016/j.msec.2018.12.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 10/21/2018] [Accepted: 12/10/2018] [Indexed: 10/27/2022]
Abstract
We study the effect of simulated biological aging on the properties of cyclic olefin copolymers and particularly their biocompatibility. Already reported as biocompatible polymers according to ISO/EN 10993 guidelines, COC are good candidates for medical devices. The influence of two major additives (antioxidants and lubricants) was investigated and comparison with non-aging COC was done. Four in vitro simulated biological conditions were tested: 2 extreme pH (1 and 9) to simulate digestive tract environment; THP-1-derived macrophages contact and pro-oxidant medium with hypochlorite solution simulating the oxidative attack during the foreign body reaction. After one month of incubation with the different media at 37 °C, surface topography was studied by atomic force microscopy (AFM) and IR spectroscopy. Extracts of incubated media were also analysed in chromatography to investigate potential degradation products. Cytotoxicity (MTT and LDH) of the materials was evaluated using cell culture methods with L929 fibroblasts. Oxidative stress (ROS and SOD analysis) and two inflammatory biomarkers (Il-6 and TNF-α secretion) were explored on THP-1-derived macrophages in direct contact with aged COC. Surface topography of COC was modified by aging conditions with an influence of antioxidant presence and under some conditions. HPLC analysis realized on freeze-dried solutions issued from the different incubations showed the presence of traces of low molecular weight compounds issued from polyphenolic antioxidant and from COC degradation. GC-MS analysis carried out directly on the different incubated COC, showed no detectable leachable molecules. No cytotoxicity has been observed with the different aged COC. However, results show that the pH environment had an influence on the cytotoxicity tests with a protecting effect of antioxidant presence; and pro-oxidant incubating conditions decreased cellular viability on COC. pH 1 and pH 9 conditions also induced an increase of ROS production which was partially reduced for COC containing an antioxidant or a lubricant. Il-6 production was globally more important for aged COC compared with basal condition and particularly for oxidative simulated environment. Those results indicate that physiological factors like pH or oxidant conditions have an impact on surface topography and on COC interaction with the biological environment but without compromising their biocompatibility. Antioxidant or lubricant presence could modulate these variations pointing out the necessity of a thoroughly investigation for biocompatibility assessment of COC as a component of implantable devices. COCs show a good biocompatibility even after accelerated aging under extreme biological conditions.
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Affiliation(s)
- Mélisande Bernard
- Paris-Sud University, Faculty of Pharmacy, EA 401 "Groupe Matériaux et Santé", Paris, France; Assistance Publique - Hôpitaux de Paris, Agence Générale des Produits et Equipements de Santé, Quality Control Department, Paris, France
| | - Emile Jubeli
- Paris-Sud University, Faculty of Pharmacy, EA 401 "Groupe Matériaux et Santé", Paris, France.
| | - Joudi Bakar
- Paris-Sud University, Faculty of Pharmacy, EA 401 "Groupe Matériaux et Santé", Paris, France
| | - Johanna Saunier
- Paris-Sud University, Faculty of Pharmacy, EA 401 "Groupe Matériaux et Santé", Paris, France
| | - Najet Yagoubi
- Paris-Sud University, Faculty of Pharmacy, EA 401 "Groupe Matériaux et Santé", Paris, France
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Tortolano L, Matmati H, Bourhis M, Manerlax K, Lemare F, Saunier J, Yagoubi N. DinCH and ESBO actual migration from PVC infusion tubings used in an oncopediatric unit. J Appl Polym Sci 2018. [DOI: 10.1002/app.46649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lionel Tortolano
- EA 401: Matériaux et santé; Université Paris-Saclay, UFR Pharmacie; Châtenay-Malabry F-92290 France
- Groupe hospitalier Henri Mondor, Department of Pharmacy; Assistance Publique-Hôpitaux de Paris; Créteil F-94010 France
| | - Houssem Matmati
- EA 401: Matériaux et santé; Université Paris-Saclay, UFR Pharmacie; Châtenay-Malabry F-92290 France
| | - Matthieu Bourhis
- Département de Pharmacie Clinique; Gustave Roussy, Université Paris-Saclay; Villejuif F-94805 France
| | - Katia Manerlax
- EA 401: Matériaux et santé; Université Paris-Saclay, UFR Pharmacie; Châtenay-Malabry F-92290 France
| | - François Lemare
- Département de Pharmacie Clinique; Gustave Roussy, Université Paris-Saclay; Villejuif F-94805 France
- Chair of Clinical Pharmacy, Faculty of Pharmacy of Paris; Sorbonne-Paris University; Paris F-75006 France
- EA 7348 (MOS) de l'Ecole des Hautes Etudes de Santé Publique; Rennes F-35000 France
| | - Johanna Saunier
- EA 401: Matériaux et santé; Université Paris-Saclay, UFR Pharmacie; Châtenay-Malabry F-92290 France
| | - Najet Yagoubi
- EA 401: Matériaux et santé; Université Paris-Saclay, UFR Pharmacie; Châtenay-Malabry F-92290 France
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Tortolano L, Saunier J, Hammami S, Manerlax K, Matmati H, Do B, Jubeli E, Fattal E, Yagoubi N. Restructuration kinetics of amphiphilic intraocular lenses during aging. Colloids Surf B Biointerfaces 2018; 161:420-432. [PMID: 29121615 DOI: 10.1016/j.colsurfb.2017.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/11/2017] [Accepted: 11/02/2017] [Indexed: 12/11/2022]
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Bernard M, Jubeli E, Bakar J, Tortolano L, Saunier J, Yagoubi N. Biocompatibility assessment of cyclic olefin copolymers: Impact of two additives on cytotoxicity, oxidative stress, inflammatory reactions, and hemocompatibility. J Biomed Mater Res A 2017; 105:3333-3349. [PMID: 28875577 DOI: 10.1002/jbm.a.36199] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 04/29/2017] [Revised: 08/02/2017] [Accepted: 08/07/2017] [Indexed: 12/11/2022]
Abstract
This work reports the biocompatibility evaluation of cyclic olefin copolymers (COC) as candidates for implantable medical devices. The focus was to establish the influence of two major additives (antioxidant and lubricant) on the overall biocompatibility. The cytotoxicity was evaluated according to ISO 10993-5 guidelines using L929 fibroblasts, HUVEC, and THP-1-derived macrophages. Oxidative stress (ROS, GSH/GSSG, and SOD analysis) and pro-inflammatory cytokines (Il-6 and TNF-α secretion) were quantified using THP-1 cells in direct contact with films. Hemocompatibility was assessed through haemolysis testing, dynamic blood coagulation, platelet adhesion, and activation (membranous P-selectin expression). Results show that the different types of COC have successfully passed the in vitro biocompatibility tests. The presence of antioxidant induces however a slight decrease in ROS production in correlation with a high SOD activity and a modification in blood coagulation profile probably linked to antioxidant recrystallization phenomenon on the surface of COC. The lubricant presence reduced haemolysis, fibrinogen adhesion, and platelet activation. Surface nanotopography of COC highlights different types of needles and globules according to the present additive. Those primary results indicate that COC are promising biomaterial. However, additives influenced some biological parameters pointing out the necessity of a global approach of risk analysis for biocompatibility evaluation. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3333-3349, 2017.
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Affiliation(s)
- Mélisande Bernard
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France.,Assistance Publique - Hôpitaux de Paris, Agence Générale des Produits et Equipements de Santé, Laboratories Departement, Paris, France
| | - Emile Jubeli
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France
| | - Joudi Bakar
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France
| | - Lionel Tortolano
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France
| | - Johanna Saunier
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France
| | - Najet Yagoubi
- Department of Pharmacy, Paris-Sud University, EA 401 Groupe Matériaux et Santé, Paris, France
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15
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Nouman M, Saunier J, Jubeli E, Marlière C, Yagoubi N. Impact of sterilization and oxidation processes on the additive blooming observed on the surface of polyurethane. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.03.002] [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: 10/20/2022]
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16
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Al Salloum H, Saunier J, Dazzi A, Vigneron J, Etcheberry A, Marlière C, Aymes-Chodur C, Herry JM, Bernard M, Jubeli E, Yagoubi N. Characterization of the surface physico-chemistry of plasticized PVC used in blood bag and infusion tubing. Mater Sci Eng C Mater Biol Appl 2017; 75:317-334. [PMID: 28415468 DOI: 10.1016/j.msec.2017.02.057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 11/28/2016] [Accepted: 02/14/2017] [Indexed: 10/20/2022]
Abstract
Commercial infusion tubing and blood storage devices (tubing, blood and platelets bags) made of plasticized PVC were analyzed by spectroscopic, chromatographic and microscopic techniques in order to identify and quantify the additives added to the polymer (lubricants, thermal stabilizers, plasticizers) and to put into evidence their blooming onto the surface of the devices. For all the samples, deposits were observed on the surface but with different kinds of morphologies. Ethylene bis amide lubricant and metallic stearate stabilizers were implicated in the formation of these layers. In contact with aqueous media, these insoluble deposits were damaged, suggesting a possible particulate contamination of the infused solutions.
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Affiliation(s)
- H Al Salloum
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France
| | - J Saunier
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France.
| | - A Dazzi
- LCP, CNRS-UMR8000, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - J Vigneron
- ILV, CNRS, UVSQ, Université Paris-Saclay, 45 Avenue des Etats Unis, 78035 Versailles, France
| | - A Etcheberry
- ILV, CNRS, UVSQ, Université Paris-Saclay, 45 Avenue des Etats Unis, 78035 Versailles, France
| | - C Marlière
- ISMO, UMR CNRS 8214, Univ. Paris Sud, Université Paris-Saclay, 91405 Orsay cedex, France
| | - C Aymes-Chodur
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France
| | - J M Herry
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - M Bernard
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France
| | - E Jubeli
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France
| | - N Yagoubi
- IFR 141, EA 401, UFR de Pharmacie, Univ. Paris Sud - Université Paris-Saclay, 92290 Chatenay Malabry, France
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17
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Saunier J, Herry JM, Yagoubi N, Marlière C. Exploring complex transitions between polymorphs on a small scale by coupling AFM, FTIR and DSC: the case of Irganox 1076® antioxidant. RSC Adv 2017. [DOI: 10.1039/c6ra25632e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thanks to adhesion force mapping by AFM, solid/solid transitions are distinguished from melting/recrystallization processes occurring in the same temperature range.
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Affiliation(s)
- Johanna Saunier
- IFR 141
- EA 401
- UFR de Pharmacie
- Univ. Paris Sud
- Université Paris-Saclay
| | - Jean-Marie Herry
- Micalis Institute
- INRA
- AgroParisTech
- Université Paris-Saclay
- 78350 Jouy-en-Josas
| | - Najet Yagoubi
- IFR 141
- EA 401
- UFR de Pharmacie
- Univ. Paris Sud
- Université Paris-Saclay
| | - Christian Marlière
- ISMO
- UMR CNRS 8214
- Univ. Paris Sud
- Université Paris-Saclay
- 91405 Orsay cedex
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18
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Nouman M, Jubeli E, Saunier J, Yagoubi N. Exudation of additives to the surface of medical devices: impact on biocompatibility in the case of polyurethane used in implantable catheters. J Biomed Mater Res A 2016; 104:2954-2967. [DOI: 10.1002/jbm.a.35837] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/21/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Micheal Nouman
- Université Paris-Sud, EA401 Matériaux et Santé, IFR 141, Faculté De Pharmacie; Châtenay Malabry France
| | - Emile Jubeli
- Université Paris-Sud, EA401 Matériaux et Santé, IFR 141, Faculté De Pharmacie; Châtenay Malabry France
| | - Johanna Saunier
- Université Paris-Sud, EA401 Matériaux et Santé, IFR 141, Faculté De Pharmacie; Châtenay Malabry France
| | - Najet Yagoubi
- Université Paris-Sud, EA401 Matériaux et Santé, IFR 141, Faculté De Pharmacie; Châtenay Malabry France
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19
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Al Salloum H, Saunier J, Tfayli A, Yagoubi N. Studying DEHP migration in plasticized PVC used for blood bags by coupling Raman confocal microscopy to UV spectroscopy. Mater Sci Eng C Mater Biol Appl 2015; 61:56-62. [PMID: 26838824 DOI: 10.1016/j.msec.2015.12.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 10/06/2015] [Accepted: 12/04/2015] [Indexed: 11/28/2022]
Abstract
Plasticized PVC is widely used to make medical devices such as tubing, perfusion bags and blood bags. By using confocal Raman microscopy on a PVC sheet plasticized with around 40% of di-(2-ethylhexyl)phthalate (DEHP), we propose a simple and sensitive approach to studying and understanding the diffusion of plasticizers from polymers into the surrounding media. Moreover, we sought to correlate our findings to standard measurements conducted by UV spectroscopy. This study showed differences in the concentration gradient observed due to the diffusion of the plasticizer inside a PVC sheet. We can thus follow the critical DEHP ratios that can impact the diffusion process. Water and ethanol were chosen as storage media: in ethanol, the lowest concentration of DEHP was observed at the surface resulting in the formation of a less plasticized layer near the interface; unlike ethanol, PVC sheets stored in water showed a greater concentration of DEHP on the film surface as an exudation of DEHP onto the surface.
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Affiliation(s)
- H Al Salloum
- IFR 141, EA 401, UFR de Pharmacie - Université Paris Sud, 92290 Chatenay Malabry, France
| | - J Saunier
- IFR 141, EA 401, UFR de Pharmacie - Université Paris Sud, 92290 Chatenay Malabry, France.
| | - A Tfayli
- Lip(Sys)(2), UFR de Pharmacie - Université Paris Sud, 92290 Chatenay Malabry, France
| | - N Yagoubi
- IFR 141, EA 401, UFR de Pharmacie - Université Paris Sud, 92290 Chatenay Malabry, France
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20
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Al Salloum H, Saunier J, Aymes-Chodur C, Barakat H, Yagoubi N. Impact of the nature and concentration of plasticizers on the ability of PVC to sorb drug. Int J Pharm 2015; 496:664-75. [PMID: 26561727 DOI: 10.1016/j.ijpharm.2015.11.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 07/31/2015] [Revised: 11/02/2015] [Accepted: 11/03/2015] [Indexed: 01/02/2023]
Abstract
The sorption of a drug by an infusion set may dramatically reduce the drug delivery efficiency. In this paper, we investigated how the drug sorption, in static conditions, is affected by the plasticizer's nature and ratio in the case of plasticized PVC, one of the most common material for infusion set tubing. Within the study, the drug concentration in diazepam solutions was studied after contact with PVC films containing different amounts of DEHP, DEHT, TOTM and DINCH® plasticizers. Moreover the partition coefficients between material and water were calculated. The drug sorption levels were equivalent for the different plasticizers and there was a plasticizer ratio for which the drug uptake was enhanced. As a consequence, the amount of sorbed drug might not be only linked to the amount of plasticizer in the film and to the solubility of the drug in the plasticizer alone: it must probably depend on specific interactions between plasticizer and PVC.
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Affiliation(s)
- H Al Salloum
- IFR 141, EA 401, UFR de Pharmacie, Université Paris, Sud-92290 Chatenay Malabry, France
| | - J Saunier
- IFR 141, EA 401, UFR de Pharmacie, Université Paris, Sud-92290 Chatenay Malabry, France.
| | - C Aymes-Chodur
- IFR 141, EA 401, UFR de Pharmacie, Université Paris, Sud-92290 Chatenay Malabry, France
| | - H Barakat
- IFR 141, EA 401, UFR de Pharmacie, Université Paris, Sud-92290 Chatenay Malabry, France
| | - N Yagoubi
- IFR 141, EA 401, UFR de Pharmacie, Université Paris, Sud-92290 Chatenay Malabry, France
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21
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Saunier J, Herry JM, Marlière C, Renault M, Bellon-Fontaine MN, Yagoubi N. Modification of the bacterial adhesion of Staphylococcus aureus by antioxidant blooming on polyurethane films. Materials Science and Engineering: C 2015; 56:522-31. [DOI: 10.1016/j.msec.2015.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/25/2015] [Accepted: 07/09/2015] [Indexed: 11/26/2022]
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22
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Barakat H, Saunier J, Aymes Chodur C, Aubert P, Vigneron J, Etcheberry A, Yagoubi N. Modification of a cyclo-olefin surface by radio-sterilization: Is there any effect on the interaction with drug solutions? Int J Pharm 2013; 456:212-22. [DOI: 10.1016/j.ijpharm.2013.07.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 07/17/2013] [Accepted: 07/19/2013] [Indexed: 11/24/2022]
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23
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Hamoudi MC, Saunier J, Gueutin C, Fattal E, Bochot A. Beads made of α-cyclodextrin and soybean oil: the drying method influences bead properties and drug release. Drug Dev Ind Pharm 2012; 39:1306-14. [DOI: 10.3109/03639045.2012.727830] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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24
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Mrad O, Saunier J, Aymes-Chodur C, Mazel V, Rosilio V, Agnely F, Vigneron J, Etcheberry A, Yagoubi N. Aging of a medical device surface following cold plasma treatment: Influence of low molecular weight compounds on surface recovery. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.09.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Mrad O, Saunier J, Aymes-Chodur C, Rosilio V, Bouttier S, Agnely F, Aubert P, Vigneron J, Etcheberry A, Yagoubi N. A multiscale approach to assess the complex surface of polyurethane catheters and the effects of a new plasma decontamination treatment on the surface properties. Microsc Microanal 2010; 16:764-778. [PMID: 20920389 DOI: 10.1017/s1431927610093876] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Polyurethane catheters made of Pellethane 2363-80AE® were treated with a low temperature plasma developed for the decontamination of reusable polymer devices in hospitals. We investigated the modifications of the polymer surface by studying the topographic modifications, the chemical modifications, and their consequences on the wettability and bacterial adhesion. This study showed that plasma treatment modified the topography and grafted oxygen and nitrogen species onto the surface, resulting in an increase in the surface polarity. This effect could be correlated to the number of nitrogen atoms interacting with the surface. Moreover, this study demonstrated the significance of multiscale heterogeneities, and the complexity of industrial medical devices made from polymers. Their surface can be heterogeneous, and they contain additives that can migrate and change the surface composition.
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Affiliation(s)
- Omar Mrad
- Université Paris-Sud 11, EA 401, IFR 141, Faculté de Pharmacie, F-92296 Châtenay Malabry, France
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26
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Saunier J, Mazel V, Paris C, Yagoubi N. Polymorphism of Irganox 1076®: Discovery of new forms and direct characterization of the polymorphs on a medical device by Raman microspectroscopy. Eur J Pharm Biopharm 2010; 75:443-50. [DOI: 10.1016/j.ejpb.2010.04.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 03/18/2010] [Accepted: 04/24/2010] [Indexed: 11/25/2022]
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27
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Mrad O, Saunier J, Aymes Chodur C, Rosilio V, Agnely F, Aubert P, Vigneron J, Etcheberry A, Yagoubi N. A comparison of plasma and electron beam-sterilization of PU catheters. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2009.08.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Mrad O, Saunier J, Chodur CA, Agnely F, Yagoubi N. Influence of electron beam sterilization on polymers when incubated in different media. J Appl Polym Sci 2009. [DOI: 10.1002/app.29343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Saunier J, Aymes Chodur C, Leclerc B, Larbes L, Yagoubi N. Using COC as pharmaceutical or cosmetic storage material. II. Effect of electron beam radio-sterilization. J Appl Polym Sci 2008. [DOI: 10.1002/app.28275] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Saunier J, Chodur CA, Larbes L, Mrad O, Yagoubi N. Using cycloolefin copolymers as pharmaceutical or cosmetic storage material. I. A study of adjuvant migration and of polymer ageing. J Appl Polym Sci 2007. [DOI: 10.1002/app.25612] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Saunier J, Gorecki W, Alloin F, Sanchez JY. NMR Study of Cation, Anion, and Solvent Mobilities in Macroporous Poly(vinylidene fluoride). J Phys Chem B 2005; 109:2487-92. [PMID: 16851246 DOI: 10.1021/jp048717m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mobilities of lithium, PF6- and solvents in the electrolyte LiPF6-(ethylene carbonate-dimethyl carbonate-diethyl carbonate) were measured using the pulsed gradient spin-echo NMR. They were compared to those of the same electrolyte filling a macroporous poly(vinylidene fluoride) membrane. The conductivity decrease resulting in the incorporation of this macroporous membrane and the cationic transport number were analyzed in terms of (i) solvent/polymer and solvent/salt interactions, (ii) ionic dissociation, and (iii) tortuosity.
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Affiliation(s)
- J Saunier
- Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces-LEPMI, UMR 5631 CNRS-Institute National Polytechnique de Grenoble-Université Joseph Fourier, Associé à l'Université J. Fourier, BP 75 38402 Saint-Martin-d'Hères Cédex, France
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32
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Saunier J, Alloin F, Sanchez JY, Maniguet L. Plasticized microporous poly(vinylidene fluoride) separators for lithium-ion batteries. III. Gel properties and irreversible modifications of poly(vinylidene fluoride) membranes under swelling in liquid electrolytes. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.20099] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Saunier J, Alloin F, Sanchez JY, Barrière B. Plasticized microporous poly(vinylidene fluoride) separators for lithium-ion batteries. II. Poly(vinylidene fluoride) dense membrane swelling behavior in a liquid electrolyte-characterization of the swelling kinetics. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10729] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Saunier J, Alloin F, Sanchez JY, Barrière B. Plasticized microporous poly(vinylidene fluoride) separators for lithium-ion batteries. I. Swelling behavior of dense membranes with respect to a liquid electrolyte-Characterization of the swelling equilibrium. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10730] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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36
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37
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Saunier J. [Not Available]. Evocations 2001; 13:129-35. [PMID: 11634950] [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: 02/21/2023]
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38
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Saunier J, Indermühle F, Compère J. [Use of the holmium 2.1 laser in surgical arthroscopy]. Rev Med Suisse Romande 1993; 113:129-32. [PMID: 8451556] [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] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
After having been used for several years in medicine, laser energy has now been applied to arthroscopic surgery. Laser Holmium 2.1 is presently one of the most advanced machine in this field. We present here our initial experience in 40 cases compared with a control group of 40 cases treated by traditional arthroscopic surgery. This approach is less traumatic, the operative time is reduced and the postoperative period is characterized by a more complete recovery of motility and a reduction in postoperative pain.
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40
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Saunier J, Richon J. [Limping in children. Practical concepts based on 63 cases]. Rev Med Suisse Romande 1983; 103:1041-7. [PMID: 6669823] [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: 01/21/2023]
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41
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Saunier J, Chamay A. Volar perilunar dislocation of the wrist. Clin Orthop Relat Res 1981:139-42. [PMID: 7249447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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42
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Saunier J, Burdet A. [Soft tissue sarcoma of the limbs]. Helv Chir Acta 1980; 47:243-57. [PMID: 6254914] [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: 01/19/2023]
Abstract
24 cases of soft tissue tumors treated during the last 10 years are analysed. Therapeutical results and a review of the literature are presented. Survival of patients with these types of tumors is very limited. Two points have to be emphasized. --Exact histological diagnosis, large surgical resection at distance of the neoplasm, done by an experienced surgeon give the best chances of good results. In many cases this means heavy surgery and severe functional loss. --The future will surely bring better treatment for these still poorly known tumors. Perfect knowledge of the topography of the neoplasm is necessary to perform surgery in best conditions. Chemotherapy and radiotherapy should be tested on larger series of cases to prove their efficiency.
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