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Ophthalmic findings associated with Australian tick paralysis (holocyclotoxicity) in hospitalized domestic dogs and cats. Vet Ophthalmol 2024. [PMID: 38468143 DOI: 10.1111/vop.13205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 02/21/2024] [Accepted: 02/24/2024] [Indexed: 03/13/2024]
Abstract
OBJECTIVE To describe ophthalmic findings in hospitalized canine and feline patients with tick paralysis (TP) and investigate possible predisposing factors. ANIMALS STUDIED Forty-seven dogs and 28 cats hospitalized with TP assessed with an ophthalmic examination performed by an ABVO resident. METHODS Dogs and cats were hospitalized with TP from October 2021 to January 2022 and had an ophthalmic examination performed by an ABVO resident. Patient signalment data, information regarding tick number and location, hospitalization duration, medications used, and patient paralysis grades were recorded. Statistical analysis was performed to correlate findings. RESULTS Corneal ulcers developed in up to 34.8% of dogs and up to 42.9% of cats hospitalized with TP. An absent palpebral reflex ipsilaterally increased the odds of a concurrent corneal ulcer being present by 14.7× in dogs and 20.1× in cats (p < .0001). Palpebral reflexes were absent in 38.3% of dogs and 35.7% of cats hospitalized with TP and were correlated with more severe gait paralysis (p = .01) and respiratory paralysis (p = .005) in dogs, and respiratory paralysis in cats (p = .041). STT-1 findings <10 mm/min were present in 27.7% of dogs and 57.1% of cats examined and were associated with increasing gait paralysis (p = .017) and respiratory paralysis (p = .007) in dogs, and increasing gait paralysis in cats (p = .017). CONCLUSIONS Simple corneal ulcers, loss of a complete palpebral reflex, and reduced STT-1 scores frequently occurred in dogs and cats hospitalized for TP. The frequency of these findings increased as the degree of patient paralysis increased.
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Retrospective assessment of ophthalmic disease development in domestic dogs and cats when hospitalised with tick paralysis caused by Ixodes holocyclus. Aust Vet J 2024. [PMID: 38369322 DOI: 10.1111/avj.13325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/19/2023] [Accepted: 01/21/2024] [Indexed: 02/20/2024]
Abstract
OBJECTIVE To investigate the incidence and predisposing factors leading to the development of corneal ulcers and the loss of a palpebral reflex in hospitalised canine and feline patients with tick paralysis (TP). ANIMALS STUDIED A total of 102 dogs and 100 cats retrospectively were assessed from previously hospitalised patients. METHODS A retrospective cohort study was performed on 102 different canine and 100 different feline patients who were hospitalised for TP from October 2020-January 2022. Patient data were collected, and logistic regression was conducted to determine factors affecting the palpebral reflex and the development of corneal ulcers. RESULTS Corneal ulcers occurred in 23/102 (22.5%) dogs during hospitalisation and were strongly associated with an incomplete palpebral reflex ipsilaterally during hospitalisation (P < 0.001), hospitalisation ≥3 days (P = 0.004), mechanical ventilation ≥3 days (P = 0.015) or a tick location cranial to C1 (P = 0.003). An incomplete palpebral reflex during hospitalisation was observed in 29/102 (28.4%) dogs and was significantly associated with decreasing patient weight (P = 0.018), increasing days hospitalised (P = 0.001), having a tick found cranial to C1 (P = 0.004), highest recorded GP grade (P = 0.01), highest recorded RP grade (P = 0.005), use of amoxycillin-clavulanic acid during hospitalisation (P = 0.002) and use of piperacillin/tazobactam during hospitalisation (P = 0.003). There was a significant association between the loss of a complete palpebral reflex and mortality during hospitalisation in dogs (OR = 4.5, P = 0.029). Corneal ulcers occurred in 10/100 (10.0%) cats during hospitalisation, and was significantly more likely to occur to an eye if an incomplete palpebral reflex was observed ipsilaterally during hospitalisation (OR = 20.1, P < 0.0001) and with increasing patient age (P = 0.019). The absence of a complete palpebral reflex during hospitalisation was observed in 18/10 (18.0%) cats and was significantly associated with increasing days hospitalised (P = 0.034). There was no significant association between the loss of a complete palpebral reflex and mortality during hospitalisation in cats. CONCLUSIONS The frequency of corneal ulcers and loss of palpebral reflexes were significant in dogs and cats hospitalised by TP, with many factors contributing to the risk of these developing.
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Hitting the Target: Developing High-quality Evidence for Proton Beam Therapy Through Randomised Controlled Trials. Clin Oncol (R Coll Radiol) 2024; 36:70-79. [PMID: 38042671 DOI: 10.1016/j.clon.2023.11.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/03/2023] [Indexed: 12/04/2023]
Abstract
The National Health Service strategy for the delivery of proton beam therapy (PBT) in the UK provides a unique opportunity to deliver high-quality evidence for PBT through randomised controlled trials (RCTs). We present a summary of three UK PBT RCTs in progress, including consideration of their key design characteristics and outcome assessments, to inform and support future PBT trial development. The first three UK multicentre phase III PBT RCTs (TORPEdO, PARABLE and APPROACH), will compare PBT with photon radiotherapy for oropharyngeal squamous cell carcinoma, breast cancer and oligodendroglioma, respectively. All three studies were designed by multidisciplinary teams, which combined expertise from clinicians, clinical trialists and scientists with strong patient advocacy and guidance from national radiotherapy research networks and international collaborators. Consistent across all three studies is a focus on the reduction of long-term radiotherapy-related toxicities and an evaluation of patient-reported outcomes and health-related quality of life, which will address key uncertainties regarding the clinical benefits of PBT. Innovative translational components will provide insights into mechanisms of toxicity and help to frame the key future research questions regarding PBT. The UK radiotherapy research community is developing and delivering an internationally impactful PBT research portfolio. The combination of data from RCTs with prospectively collected data from a national PBT outcomes registry will provide an innovative, high-quality repository for PBT research and the platform to design and deliver future trials of PBT.
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PROTOCOL FOR HUMAN EXPOSURE TO OPIOIDS AND CONCENTRATED MEDETOMIDINE USED IN FIELD APPLICATIONS. J Zoo Wildl Med 2024; 54:873-878. [PMID: 38252014 DOI: 10.1638/2022-0106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2023] [Indexed: 01/23/2024] Open
Abstract
Wildlife professionals routinely use potent sedatives and anesthetics when chemically immobilizing wildlife and zoo species in remote environments. Accidental exposure to these prescription veterinary drugs is rare but could be rapidly fatal. Commonly used agents include opioids and α2 adrenoreceptor agonists. These drugs can be reversed with specific antagonists; however, they are often not approved for human use. The protocol created here can be used by wildlife health professionals in a field setting with basic human emergency medical response training in coordination with local Emergency Medical Services (EMS). Key components include, building local relationships between EMS and wildlife professionals, focused EMS training, administering opioid and α2 adrenergic antagonists off label, and local evacuation procedures. This framework could allow wildlife management agencies or zoos to mitigate the risk of human exposures to these commonly used drugs, significantly improving occupational safety in an otherwise high-risk environment.
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Association Between Sociodemographic Factors and Vision Difficulty in the National Health Interview Survey: A Population-Based Analysis. Am J Ophthalmol 2023; 255:30-42. [PMID: 37343742 DOI: 10.1016/j.ajo.2023.06.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 06/05/2023] [Accepted: 06/16/2023] [Indexed: 06/23/2023]
Abstract
PURPOSE To investigate the relationship between social determinants of health with self-reported vision difficulty. DESIGN Cross-sectional, population-based analysis. METHODS The National Health Interview Survey (NHIS) is an annual survey based on the U.S. population ≥18 years of age. It provides self-reported data on demographic characteristics, socioeconomic factors, health status, and health care access. The 2021 NHIS database was used in this study. Adult participants of the NHIS who responded to the vision difficulty question "Do you have difficulty seeing, even when wearing glasses or contact lenses?" were included in this analysis. The outcome of interest was self-reported vision difficulty by participants. Analysis was done through univariable and multivariable logistic regression. RESULTS Overall, there were 29,464 participants included in the analysis. Univariable logistic regression showed an increased odds of self-reported vision difficulty among female (odds ratio [OR] 1.28 [95% confidence interval {CI} 1.20-1.38]; P < .001), gay, lesbian, or bisexual participants (OR 1.24 [95% CI 1.04-1.49]; P = .02), those who possessed public compared with private insurance (OR 1.83 [95% CI 1.69-1.99]; P < .001), those with less than a high school education (OR 1.88 [95% CI 1.67-2.13]; P < .001), and those with an income below the poverty threshold (OR 2.22 [95% CI 1.96-2.51]; P < .001). Multivariable analysis revealed an increased risk of vision difficulty reported amongst non-Hispanic Black participants (OR 1.65 [95% CI 1.21-2.25]; P = .002). CONCLUSIONS A multitude of sociodemographic factors are associated with self-reported vision difficulty in the U.S. POPULATION Our findings emphasize the importance of considering factors of social determinants of health in clinical practice and policymaking for patients with vision loss.
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A Prospective, Randomized Controlled, Single-Blinded Study to Assess the Effect of a 33-Gauge Needle Versus a 34-Gauge Needle on Pain Experienced During Injection of Local Anesthetic on the Face. J Drugs Dermatol 2023; 22:1124-1127. [PMID: 37943276 DOI: 10.36849/jdd.7689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
BACKGROUND Most pain experienced by patients during Mohs micrographic surgery is associated with the initial injection. Previous studies have shown that a smaller gauge needle (33-gauge vs 30-gauge) is associated with less patient-reported pain. OBJECTIVES To evaluate patient-reported pain levels following injection with a 33-gauge versus a 34-gauge needle. Methods: During this prospective, randomized, controlled, single-blinded study, 480 patients were randomized into a 33-gauge versus a 34-gauge needle group. Pain levels following needle insertion were recorded using the validated numerical rating scale (VNRS)-11 scale. Results: Injection of local anesthetic with a 34-gauge needle is associated with significantly less pain compared to a 33-gauge needle across all subgroups (P=0.007, average pain level 0.49 [34-gauge group] vs 0.79 [33-gauge group] rated on a 0-10 pain scale). Females, first-time Mohs patients, patients under age 65, patients with basal cell carcinoma, and those with tumor locations on the nose experienced the most pain reduction with the use of a 34-gauge needle. Limitations: This was a single-blinded study; thus, the injector was able to see which needle was being used. This knowledge could have subconsciously affected the angle, speed, or force used to insert the needle. CONCLUSIONS Injections with a 33-gauge and a 34-gauge needle are both tolerated well and associated with minimal pain. While the pain reduction associated with using a 34-gauge needle is statistically significant, the use of a 34-gauge needle may be most clinically relevant for certain patient subgroups. J Drugs Dermatol. 2023;22(11): doi:10.36849/JDD.7689.
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Impact of Lymphopenia on Definitive Treatment of Locally Advanced Cervical Cancer. Int J Radiat Oncol Biol Phys 2023; 117:e514-e515. [PMID: 37785607 DOI: 10.1016/j.ijrobp.2023.06.1775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Pre-treatment lymphopenia prior to initiating treatment has been correlated with reduced survival in a number of different cancers. The purpose of this study is to evaluate the association between lymphopenia and survival in women with locally advanced cervical cancer (LACC) treated with primary chemoradiation (CRT). MATERIALS/METHODS We retrospectively reviewed patients with LACC treated at a single institution from 2005 - 2021 with available lymphocyte information. Patient and treatment characteristics were recorded including age, tumor size and stage, EBRT dose/fractionation, and brachytherapy dosimetry data. Absolute lymphocyte counts (ALC) were collected prior to initiating CRT and at 3-month intervals following CRT and graded based on severity of lymphopenia using CTCAE v 5.0. Overall survival (OS), progression free survival (PFS), and local control (LC) were calculated from the start of treatment to date of last follow-up. Kaplan-Meier survival analysis was performed to evaluate whether lymphocyte changes were associated with OS, PFS, or LC. RESULTS A total of 124 patients met study inclusion criteria with stage IB - IV disease (41 stage I, 41 stage II, 36 stage III, 6 stage IV) and a median follow up of 3.6 years (range 0.2-16.5 years). The median age was 49 years (range 26-77). The median EBRT dose was 45 Gy (range: 26-57.5 Gy) and 44.2% of patients received para-aortic (PA) nodal EBRT (28.8% elective and 15.4% with positive PA nodes). 5-year OS, PFS, and LC were 60.3% (95% CI 51.5-70.7), 47.5% (95% CI 39-58), and 75.5% (95% CI 67.3-82.9), respectively. Pre-treatment lymphopenia (ALC <1000 cells/mm3) was present in 11 (9%) patients. When the total cohort was divided into patients with and without pre-treatment lymphopenia, OS was statistically improved in the patients without baseline lymphopenia, with a 5-year OS of 63.2% (95% CI 53.9-73.9) versus 35.3% (95% CI 14.5-86.3) in the lymphopenia group (p = 0.034). LC also trended to being improved in the patients without lymphopenia, though this did not reach statistical significance in our small sample size of lymphopenic patients, with 5-year LC of 76.8% (95% CI 68.4-84.3) versus 67.5% (05% CI 36.6-93.8), p = 0.45. CONCLUSION In this single institution experience of LACC treated with definitive CRT, we found that baseline lymphopenia is associated with inferior OS. Patients with higher pre-CRT ALC may represent a population with more robust immune systems, producing more favorable tumor responses to treatment. Additional studies are warranted to investigate the evolving role of combined EBRT and systemic therapy in LACC.
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The Association between Acute and Late Genitourinary and Gastrointestinal Toxicities: An Analysis of the PACE B Study. Int J Radiat Oncol Biol Phys 2023; 117:S27. [PMID: 37784464 DOI: 10.1016/j.ijrobp.2023.06.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Acute gastrointestinal (GI) and genitourinary (GU) toxicity after prostate radiotherapy (RT) has been shown to be associated with late toxicity with 3D conformal RT. However, whether this association is present with modern approaches, such as stereotactic body radiotherapy (SBRT), remains unclear. We analyzed patients treated within the international phase III non-inferiority randomized control trial, PACE-B, to assess the association between acute and late toxicity following SBRT and conventional/moderately hypofractionated radiotherapy (CRT). We hypothesize that acute toxicity is significantly associated with equivalent late toxicity following prostate SBRT and CRT. MATERIALS/METHODS We analyzed patients with GI and GU Common Terminology Criteria for Adverse Events (CTCAE) measurements in the acute (≤12 weeks post-RT) and late period (6-24 months post-RT). Using logistic regression, we analyze the association between G2+ acute GI and GU toxicities with equivalent late toxicities. Lasso variable selection was used to determine patient, tumor and treatment variables to include in the multivariable model. The area under the receiver operator characteristics curve (AUC) was used to evaluate the model's predictive performance. RESULTS Of patients included in this analysis (n = 842), 414 were treated with SBRT and 428 with CRT. In univariable analysis (UVA), G2+ acute GU toxicity was significantly associated with developing G2+ late GU toxicity after SBRT (OR 4.63, 95% CI (2.96-7.25), p<0.0001) and CRT (OR 2.83, 95% CI (1.69-4.71), p<0.0001). This association remained significant in multivariable analysis (MVA). The models AUC for predicting G2+ late GU toxicity after SBRT was 0.73 (95% CI, 0.67-0.78) and 0.66 (95% CI, 0.59-0.73) following CRT. In UVA, G2+ acute GI toxicity was associated with developing G2+ late GI toxicity after SBRT (OR 3.67, 95% CI (1.91-7.03), p <0.0001) and CRT (OR 4.4, 95% CI (2.04-9.47), p<0.0001). This association also remained significant in MVA. The models AUC for predicting G2+ late GI toxicity after SBRT was 0.66 (0.95% CI, 0.57-0.75) and 0.64 (95% CI, 0.57-0.72) following CRT. In UVA analysis, G2+ baseline GU symptoms were also associated with developing G2+ late GU toxicity after SBRT (OR 7.59, 95% CI (2.72-21.19, p<0.0001) and CRT (OR 7.98, 95% CI (3.03-20.96), p<0.0001), and this continued to be significant in MVA. Acute toxicity remained associated with persistent late toxicity (≥2 G2+ late events) and late toxicity 12-24 months. CONCLUSION Our study demonstrates an independent association between acute and late GU/GI toxicity in patients treated with SBRT and CRT for localized prostate cancer. Recognizing those at risk of late toxicity can provide an opportunity for early intervention to improve outcomes. G2+ acute toxicity should be considered an essential variable for predicting late GI/GU toxicity after prostate RT.
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Individual Patient Data Analysis of 17 Randomized Trials vs. Real-World Data for Men with Localized Prostate Cancer Receiving Radiotherapy. Int J Radiat Oncol Biol Phys 2023; 117:e404-e405. [PMID: 37785347 DOI: 10.1016/j.ijrobp.2023.06.1543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Prior work has demonstrated poor correlation between the results of randomized controlled trials (RCTs) and real-world evidence (RWD). However, patients enrolled in RCTs are often considered to poorly represent the real-world population. Herein, we utilize multiple large data repositories to determine differences in baseline characteristics and long-term outcomes between patients enrolled in RCTs and RWD that received radiotherapy for localized prostate cancer. MATERIALS/METHODS Meta-Analysis of Randomized trials in Cancer of the Prostate (MARCAP) Consortium was leveraged, and 17 phase III randomized trials were included. RWD were accessed through the Staging Collaboration for Cancer of the Prostate (STAR-CAP) cohort, a cohort that is comprised of >60 centers across the United States and Europe. Additionally, RWD was assessed via the Surveillance, Epidemiology, and End Results (SEER) database. MARCAP and STAR-CAP both contain outcomes for distant metastasis (DM), metastasis-free survival (MFS), prostate cancer-specific mortality (PCSM), and overall survival (OS). SEER only contains PCSM and OS. Wilcoxon signed-rank test and chi-square test were used to compare continuous and categorical variables, respectively. Inverse probability of treatment weighting (IPTW) analysis was conducted, balancing for age, PSA, Gleason score, T stage, and treatment year in the three cohorts. Cox and Fine-Gray regression models were used to compare disease outcomes between RCTs vs. RWD. RESULTS Data from 10,666 patients from RCTs, 6,530 patients in STAR-CAP, and 117,586 patients in SEER were included. SEER patients were slightly younger (p<0.001, median age 68 (IQR 62-73) than those in RCTs (70, IQR 65-74) and in STAR-CAP (70, IQR 64-74). 10-year OS in RCTs was 65.4%, STAR-CAP 70.2%, SEER 64.1%. OS was superior in STAR-CAP (RCTs as reference; HR 0.91, 95% CI 0.85-0.96, p<0.0001), but there was no significant difference between SEER and RCTs (HR 0.96, 95% CI 0.91-1.02, p = 0.22). 10-year PCSM cumulative incidence was 7.4% in RCTs, 8.1% in STAR-CAP, and 11.0% in SEER. There was no significant difference in PCSM between STAR-CAP RWD and RCTs (HR 0.88, 95% CI 0.78-1.01, p = 0.08), whereas PCSM was worse in SEER than RCTs (HR 1.37, 95% CI 1.21-1.55, p<0.0001). There was no significant difference in DM between STAR-CAP RWD and RCTs (HR 0.93, 95% CI 0.83-1.04, p = 0.2). CONCLUSION While baseline differences exist in patients enrolled on localized prostate cancer RCTs and real-world datasets, there were small if any significant relative differences in oncologic outcomes. This provides reassurance that RCT results are generally applicable to patients in routine practice.
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A Prospective Study Assessing the Efficacy and Toxicity of Stereotactic Body Radiation Therapy for Oligometastatic Bone Metastases. Int J Radiat Oncol Biol Phys 2023; 117:e126. [PMID: 37784681 DOI: 10.1016/j.ijrobp.2023.06.920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Stereotactic body radiation therapy (SBRT) is a promising treatment for oligometastatic disease in bone due to its delivery of high dose to target tissue and minimal dose to surrounding tissue. The purpose of this study is to assess efficacy and toxicity of this treatment in patients with previously unirradiated oligometastatic bony disease. MATERIALS/METHODS In this prospective phase II trial, patients with oligometastatic bone disease, defined as ≤3 active sites of disease, were treated with SBRT at one of two academic institutions between December 2016 and May 2019. Local progression-free survival (LPFS), progression-free survival (PFS), prostatic specific antigen (PSA) progression, and overall survival (OS) were reported. Treatment-related toxicity was also reported. RESULTS A total of 98 patients and 131 lesions arising from various tumor histologies were included in this study. The median age of patients enrolled in the study was 72.8 years (80.6% male, 19.4% female). Median follow-up was 26.7 months. The most common histology was prostate cancer (68.4%, 67/98). The most common dose prescriptions were 27/30 Gy in 3 fractions (26.0%, 34/131), 30 Gy in 5 fractions (19.1%, 25/131), or 30/35 Gy in 5 fractions (16.0%, 21/131). Multiple doses per treatment regimen reflect dose painting employing the lower dose to the clinical target volume (CTV) and higher dose to the gross tumor volume (GTV). Four patients (4.1%, 4/98) experienced local progression at one site for each patient (3.1%, 4/131). Among patients who progressed locally, the median time to local recurrence was 25.8 months (31.0 months among prostate cancer patients, N = 2, and 14.5 months among non-prostate cancer patients, N = 2). Among the entire cohort, 2-year LPFS (including death without local progression) was 85.0%, 2-year PFS (including deaths as well as local, distant, and PSA-based progression) was 47.0%, and 2-year OS was 87.5%. Twenty-seven patients (27.6%, 27/98) developed treatment-related toxicities, and most were Grade 1 (19.4%, 19/98) and 2 (4.1%, 4/98). Four patients (4.1%, 4/98) developed Grade 3 toxicities; there were no Grade 4 toxicities. The most common toxicity was fatigue (10.2%, 10/98). Of 68 treated spine metastases, there were four (5.9%, 4/68) vertebral fractures. Among these four patients, median time to fracture was 23.5 months (range 14.2-39.2 months). CONCLUSION Our study supports existing literature in showing that SBRT is effective and tolerable in patients with oligometastatic bone disease. Larger phase III trials are necessary and reasonable to determine long-term efficacy and toxicities.
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Transient Radiographic Pseudoprogression Following Fractionated SBRT for Primary Renal Cell Carcinoma. Int J Radiat Oncol Biol Phys 2023; 117:e362-e363. [PMID: 37785246 DOI: 10.1016/j.ijrobp.2023.06.2453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) SBRT is an emerging treatment for patients with RCC who are not surgical candidates. Pooled analysis of an international consortium suggests promising short term local control. In the event of local failure, other ablative methods may be used to salvage these patients. Trends in radiographic surveillance are not well characterized post SBRT. In this study we observe a common transient increase in the tumor size followed by stability or decline in patients treated with fractionated SBRT on a phase II clinical protocol. MATERIALS/METHODS Radiographic studies of patients enrolled in a phase II clinical trial were reviewed for this report. Primary RCC tumors were treated using SBRT with two fractionation schema (48 Gy in 3 or 4 fractions) based on a 5 cm size threshold. Patients were followed with routine imaging per protocol at 3, 6, 12, 18, and 24 months post-treatment. Percent change in greatest dimension is analyzed over time and subsequently stratified by dose, baseline tumor diameter, and PTV. An increase in tumor size by 10% or greater followed by tumor shrinkage or stability was considered a transient increase. RESULTS From August of 2013 to December of 2022, 40 patients were enrolled in this trial with a median age of 77.5 and follow up of 18 months. 32 patients with at least two follow up images (minimum of 6 months post-SBRT) were included in the analysis. 26 of these patients were treated with 48 Gy in 3 fractions and 6 were treated with 48 Gy in 3 fractions. Median tumor size was 38.4 cc with a median diameter of 3.5 cm. 46.9% of patients experienced a transient increase with a median increase of 19.7% (range = 63.1, IQR = 13.9%-38.6%) of the pretreatment largest dimension. 66.7% of patients with tumors ≥ 5 cm experienced a transient increase vs. 42.3% of patients with tumors < 5cm. 56.3% of patients with PTV ≥ 38.4 cc experienced a transient increase vs. 40% of patients with a PTV < 38.4cc. Patients with PTV < 38.4 cc experienced a median 19% increase compared with the PTV ≥ 38.4 cc median increase of 37.5%. Most common transient increase was observed at 3 months post treatment. Of patients evaluated with CT scans, 50% experienced a transient increase, compared with 37.5% of those evaluated with MRI scans. CONCLUSION SBRT is a promising treatment for primary RCC, however radiographic surveillance of the disease post-treatment is not well characterized. In this study of patients enrolled in a Phase II protocol, there appears to be a transient radiographic increase in the size of primary tumors followed by stability and decline. Further investigations will guide the timing and need for salvage treatment for post- SBRT RCC.
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Melanocortin-4 receptor and proopiomelanocortin: Candidate genes for obesity in domestic shorthair cats. Anim Genet 2023; 54:637-642. [PMID: 37365843 DOI: 10.1111/age.13335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/16/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023]
Abstract
Obesity is an escalating global health problem affecting both humans and companion animals. In cats it is associated with increased mortality and multiple diseases, including diabetes mellitus. Two genes coding for proteins known to play a critical role in energy homeostasis across species are the proopiomelanocortin (POMC) gene and the melanocortin-4 receptor (MC4R) gene. A missense variant in the coding sequence of the feline MC4R (MC4R:c.92C>T) has been reported to be associated with diabetes and overweight in domestic shorthair cats, and while variants in the POMC gene are known to cause obesity in humans and dogs, variants in POMC and their association with feline obesity and diabetes mellitus have not been investigated to date. The current study aimed to assess the association between the previously described MC4R variant and body condition score (BCS), as well as body fat content (%BF) in 89 non-diabetic domestic shorthair cats. Furthermore, we investigated the feline POMC gene as a potential candidate gene for obesity. Our results indicate that the MC4R:c.92C>T polymorphism is not associated with BCS or %BF in non-diabetic domestic shorthair cats. The mutation analysis of all POMC exons identified two missense variants, with a variant in exon 1 (c.28G>C; p.G10R) predicted to be damaging. The variant was subsequently assessed in all 89 cats, and cats heterozygous for the variant had a significantly increased body condition score (p = 0.03) compared with cats homozygous for the wild-type allele. Results from our study provide additional evidence that the previously described variant in MC4R is not associated with obesity in domestic shorthair cats. More importantly, we have identified a novel variant in the POMC gene, which might play a role in increased body condition score and body fat content in domestic shorthair cats.
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Is the Motion Causing a Commotion? Two-Fraction Prostate SBRT on the MR-Linac. Int J Radiat Oncol Biol Phys 2023; 117:e449-e450. [PMID: 37785446 DOI: 10.1016/j.ijrobp.2023.06.1634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) In HERMES (NCT04595019) men with localized prostate cancer are treated on the Unity MR-Linac platform (MRL, Elekta AB, Stockholm) and randomized between stereotactic body radiotherapy (SBRT) with 36.25 Gy in 5 fractions and 24 Gy in 2 fractions. Patients randomized to two fractions receive 24 Gy to the high risk PTV, 20 Gy to the low risk PTV and a boost of 27 Gy to the dominant intraprostatic lesion. This study explores dose received by the target and organs at risk (OARs) when considering intrafraction motion in two fraction SBRT. MATERIALS/METHODS Targets and OARs were delineated and a reference plan generated on Monaco v5.40.01 (Elekta). An Adapt-to-Shape (ATS) workflow was used. Contours were propagated to the session MRI (MRIsession) and edited accordingly. Prior to delivery, a verification MRI (MRIverif) was acquired with baseline shifts corrected for using the Adapt-to-Position (ATP-of-ATS) workflow. A post treatment MRI (MRIpost) was acquired after delivery. Men in the 2-fraction arm received each fraction in 2 sub-fractions sequentially on the same day, to mitigate intrafraction motion. The plans of 5 men receiving 2 fraction SBRT were analyzed. The targets, urethra, bladder and rectum were recontoured on the MRIverif and MRIpost. Delivered plans were recalculated on the corresponding MRIverif and MRIpost. The percentage of optimal and mandatory target dose constraints met were calculated. Accumulated OAR doses were calculated by averaging their respective dose statistics across all sub-fractions, conservatively assuming that the same area of the OAR receives the maximum dose each fraction. Analysis was carried out separately for MRIverif and MRIpost as the true 'delivered dose' most likely lies between these two estimates. RESULTS There was good coverage across all fractions. The mandatory constraints of CTVpsv V24.0 Gy > 95% and CTVsv V20.0 Gy > 95% were met in 100% of fractions and V2700cGy > 95% in 90% on the MRIpost. Table 3 shows OAR dose. CONCLUSION This work demonstrates that target coverage is good, even for the GTV where no margin is applied. With our conservative dose calculation approach, we found dose constraints are exceeded for some patients. However, treatment has been well tolerated, suggesting that that our current dose constraints may be cautious. Once Elekta's True Tracking and automated gating software is implemented at our center we will be able to further improve OAR clinical goal compliance.
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Acute Toxicity of Hypofractionated and Conventionally Fractionated (Chemo)Radiotherapy Regimens for Bladder Cancer: An Exploratory Analysis from the RAIDER Trial. Clin Oncol (R Coll Radiol) 2023; 35:586-597. [PMID: 37225552 DOI: 10.1016/j.clon.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/24/2023] [Accepted: 05/04/2023] [Indexed: 05/26/2023]
Abstract
AIMS Adding concurrent (chemo)therapy to radiotherapy improves outcomes for muscle-invasive bladder cancer patients. A recent meta-analysis showed superior invasive locoregional disease control for a hypofractionated 55 Gy in 20 fractions schedule compared with 64 Gy in 32 fractions. In the RAIDER clinical trial, patients undergoing 20 or 32 fractions of radical radiotherapy were randomised (1:1:2) to standard radiotherapy or to standard-dose or escalated-dose adaptive radiotherapy. Neoadjuvant chemotherapy and concomitant therapy were permitted. We report exploratory analyses of acute toxicity by concomitant therapy-fractionation schedule combination. MATERIALS AND METHODS Participants had unifocal bladder urothelial carcinoma staged T2-T4a N0 M0. Acute toxicity was assessed (Common Terminology Criteria for Adverse Events) weekly during radiotherapy and at 10 weeks after the start of treatment. Within each fractionation cohort, non-randomised comparisons of the proportion of patients reporting treatment emergent grade 2 or worse genitourinary, gastrointestinal or other adverse events at any point in the acute period were carried out using Fisher's exact tests. RESULTS Between September 2015 and April 2020, 345 (163 receiving 20 fractions; 182 receiving 32 fractions) patients were recruited from 46 centres. The median age was 73 years; 49% received neoadjuvant chemotherapy; 71% received concomitant therapy, with 5-fluorouracil/mitomycin C most commonly used: 44/114 (39%) receiving 20 fractions; 94/130 (72%) receiving 32 fractions. The acute grade 2+ gastrointestinal toxicity rate was higher in those receiving concomitant therapy compared with radiotherapy alone in the 20-fraction cohort [54/111 (49%) versus 7/49 (14%), P < 0.001] but not in the 32-fraction cohort (P = 0.355). Grade 2+ gastrointestinal toxicity was highest for gemcitabine, with evidence of significant differences across therapies in the 32-fraction cohort (P = 0.006), with a similar pattern but no significant differences in the 20-fraction cohort (P = 0.099). There was no evidence of differences in grade 2+ genitourinary toxicity between concomitant therapies in either the 20- or 32-fraction cohorts. CONCLUSION Grade 2+ acute adverse events are common. The toxicity profile varied by type of concomitant therapy; the gastrointestinal toxicity rate seemed to be higher in patients receiving gemcitabine.
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Rapid kidney function decline and increased risk of heart failure in patients with type 2 diabetes: findings from the ACCORD cohort : Rapid kidney function decline and heart failure in T2D. Cardiovasc Diabetol 2023; 22:131. [PMID: 37365586 PMCID: PMC10291814 DOI: 10.1186/s12933-023-01869-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/28/2023] [Indexed: 06/28/2023] Open
Abstract
BACKGROUND Impaired kidney function and albuminuria are associated with increased risk of heart failure (HF) in patients with type 2 diabetes (T2D). We investigated whether rapid kidney function decline over time is an additional determinant of increased HF risk in patients with T2D, independent of baseline kidney function, albuminuria, and other HF predictors. METHODS Included in the study were 7,539 participants in the Action to Control Cardiovascular Risk in Diabetes (ACCORD) study with baseline urinary albumin-to-creatinine ratio (UACR) data, who had completed 4 years of follow-up and had ≥ 3 eGFR measurements during that period (median eGFR/year = 1.9, IQR 1.7-3.2). The association between rapid kidney function decline (eGFR loss ≥ 5 ml/min/1.73 m2/year) and odds of HF hospitalization or HF death during the first 4 years of follow-up was estimated by logistic regression. The improvement in risk discrimination provided by adding rapid kidney function decline to other HF risk factors was evaluated as the increment in the area under the Receiving Operating Characteristics curve (ROC AUC) and integrated discrimination improvement (IDI). RESULTS Over 4 years of follow-up, 1,573 participants (20.9%) experienced rapid kidney function decline and 255 (3.4%) experienced a HF event. Rapid kidney function decline was associated with a ~ 3.2-fold increase in HF odds (3.23, 95% CI, 2.51-4.16, p < 0.0001), independent of baseline CVD history. This estimate was not attenuated by adjustment for potential confounders, including eGFR and UACR at baseline as well as at censoring (3.74; 95% CI 2.63-5.31). Adding rapid kidney function decline during follow-up to other clinical predictors (WATCH-DM score, eGFR, and UACR at study entry and end of follow-up) improved HF risk classification (ROC AUC = + 0.02, p = 0.027; relative IDI = + 38%, p < 0.0001). CONCLUSIONS In patients with T2D, rapid kidney function decline is associated with a marked increase in HF risk, independent of starting kidney function and/or albuminuria. These findings highlight the importance of serial eGFR measurements over time to improve HF risk estimation in T2D.
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Correlation of Clinician- and Patient-Reported Outcomes in the BC2001 Trial. Clin Oncol (R Coll Radiol) 2023; 35:331-338. [PMID: 36918330 DOI: 10.1016/j.clon.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 01/04/2023] [Accepted: 02/02/2023] [Indexed: 02/11/2023]
Abstract
AIMS To evaluate whether there is sufficient correlation between patient-reported outcomes (PROs) and clinician-reported outcomes (CROs) in bladder cancer follow-up post-radiotherapy to streamline data collection and to reduce trial follow-up burden on patients, clinicians and trial programmes. MATERIALS AND METHODS PROs data were collected within the BC2001 trial using the Functional Assessment of Cancer Therapy specific to bladder cancer (FACT-BL) questionnaire. CROs data were collected by clinicians using Late Effects in Normal Tissues Subjective, Objective and Management (LENT/SOM). Data were collected at baseline, post-treatment, at 6 and 12 months post-randomisation and then annually to 5 years. The percentage agreement between CROs and PROs measures was evaluated at 2 and 5 years post-randomisation. Concordance was tested using the weighted Kappa statistic with 95% confidence intervals. RESULTS Correlation was evaluated between six categories of the FACT-BL and LENT/SOM scores. At 2 years the percentage agreement across these domains ranged from 45 to 78%, with the weighted Kappa statistic between 0.07 and 0.35. Results were similar in year 5 with 48-83% agreement and kappa statistics between -0.02 and 0.21. CONCLUSION The correlation between CROs and PROs in patients treated with radiotherapy for bladder cancer were generally poor. PROs appear to be more sensitive, with higher grade events reported. Further work is needed to evaluate whether PROs alone can be used to evaluate toxicity-related outcomes in randomised controlled trials.
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Differences in Quality of Life and Toxicity for Male and Female Patients following Chemo(radiotherapy) for Bladder Cancer. Clin Oncol (R Coll Radiol) 2023; 35:e336-e343. [PMID: 36906497 DOI: 10.1016/j.clon.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 01/12/2023] [Accepted: 02/07/2023] [Indexed: 02/13/2023]
Abstract
AIMS BC2001, a randomised trial of treatment for muscle-invasive bladder cancer, demonstrated no difference in health-related quality of life (HRQoL) or late toxicity between patients receiving radical radiotherapy with and without chemotherapy. This secondary analysis explored sex-based differences in HRQoL and toxicity. MATERIALS AND METHODS Participants completed the Functional Assessment of Cancer Therapy Bladder (FACT-BL) HRQoL questionnaires at baseline, end of treatment, 6 months and annually until 5 years. Clinicians assessed toxicity with the Radiation Therapy Oncology Group (RTOG) and Late Effects in Normal Tissues Subjective, Objective and Management (LENT/SOM) scoring systems at the same timepoints. The impact of sex on patient-reported HRQoL was evaluated using multivariate analyses of change in FACT-BL subscores from baseline to the timepoints of interest. For clinician-reported toxicity, differences were compared by calculating the proportion of patients with grade 3-4 toxicities occurring over the follow-up period. RESULTS For both males and females, all FACT-BL subscores had a reduction in HRQoL at the end of treatment. For males, the mean bladder cancer subscale (BLCS) score remained stable through to year 5. For females, there was a decline in BLCS from baseline at years 2 and 3 with a return to baseline at year 5. At year 3, females had a statistically significant and clinically meaningful worsening of mean BLCS score (-5.18; 95% confidence interval -8.37 to -1.99), which was not seen in males (0.24; -0.76 to 1.23). RTOG toxicity was more frequent in females than males (27% versus 16%, P = 0.027). CONCLUSION Results suggest that female patients treated with radiotherapy ± chemotherapy for localised bladder cancer report worse treatment-related toxicity in post-treatment years 2 and 3 than males.
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Suboptimal Titration of Heart Failure Medications in Pediatric Patients: Baseline Data from the ACTION Network. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Operative Expectations for Mohs Surgery in Chronic Lymphocytic Leukemia Patients: A Multicenter Retrospective Cohort Study. JAAD Int 2023; 11:193-199. [PMID: 37138831 PMCID: PMC10149394 DOI: 10.1016/j.jdin.2023.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2023] [Indexed: 03/14/2023] Open
Abstract
Background Patients with chronic lymphocytic leukemia (CLL) are immunocompromised and have both a higher incidence of and more aggressive skin cancers, often requiring treatment with Mohs micrographic surgery. Objective Characterize operative expectations for Mohs surgery in patients with CLL. Methods Multicenter retrospective cohort study. Results One hundred fifty-nine tumors from 99 patients with CLL were matched 1:4 with controls. Cases had higher odds for requiring at least 3 stages during Mohs surgery compared to controls (odds ratio = 1.91; 95% CI [1.21-3.02]; P = .01). The mean number of Mohs stages in cases was 1.97 (±0.92) compared with 1.67 (±0.87) in controls (P = .0001). A regression analysis showed that cases had larger postoperative tumor areas (cm2) versus controls (mean = 5.57 vs 4.47; estimate difference Δβ = 1.10 cm2; 95% CI [0.18-2.03]; P = .02). In logistic regression, cases were twice as likely to receive a flap repair compared to controls (odds ratio = 2.45; 95% CI [1.58-3.8]). Limitations Retrospective cohort study and lack of histologic subtyping of tumors. Conclusion Patients with CLL require more Mohs stages to attain clear surgical margins, have larger postoperative defect areas, and require more advanced repair techniques compared to a control population without CLL. These findings are essential for preoperative planning and patient counseling and further support the use of Mohs surgery in patients with CLL.
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TbEu(BTC) as a dNTP label for LAMP outcome in nucleic acid testing. ELECTROANAL 2023. [DOI: 10.1002/elan.202200504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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Eukaryotic translation initiation factor eIF4E-5 is required for spermiogenesis in Drosophila melanogaster. Development 2023; 150:286752. [PMID: 36695474 DOI: 10.1242/dev.200477] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/16/2023] [Indexed: 01/26/2023]
Abstract
Drosophila sperm development is characterized by extensive post-transcriptional regulation whereby thousands of transcripts are preserved for translation during later stages. A key step in translation initiation is the binding of eukaryotic initiation factor 4E (eIF4E) to the 5' mRNA cap. In addition to canonical eIF4E-1, Drosophila has multiple eIF4E paralogs, including four (eIF4E-3, -4, -5, and -7) that are highly expressed in the testis. Among these, only eIF4E-3 has been characterized genetically. Here, using CRISPR/Cas9 mutagenesis, we determined that eIF4E-5 is essential for male fertility. eIF4E-5 protein localizes to the distal ends of elongated spermatid cysts, and eIF4E-5 mutants exhibit defects during post-meiotic stages, including a mild defect in spermatid cyst polarization. eIF4E-5 mutants also have a fully penetrant defect in individualization, resulting in failure to produce mature sperm. Indeed, our data indicate that eIF4E-5 regulates non-apoptotic caspase activity during individualization by promoting local accumulation of the E3 ubiquitin ligase inhibitor Soti. Our results further extend the diversity of non-canonical eIF4Es that carry out distinct spatiotemporal roles during spermatogenesis.
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Telehealth Rehabilitation for the Management of Long Covid Symptoms. IRISH MEDICAL JOURNAL 2023; 115:677. [PMID: 36920416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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PEARLS: Is Our Use of Prostate-specific Membrane Antigen Positron Emission Tomography-Computed Tomography Meaningful for Our Patients? Clin Oncol (R Coll Radiol) 2022; 34:589-592. [PMID: 35649963 DOI: 10.1016/j.clon.2022.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/06/2022] [Accepted: 05/05/2022] [Indexed: 11/15/2022]
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Effectiveness of aspirin vs. clopidogrel in dogs with immune mediated haemolytic anaemia evaluated by serial thromboelastography and platelet mapping. Vet J 2022; 287:105882. [PMID: 35963596 DOI: 10.1016/j.tvjl.2022.105882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 08/09/2022] [Accepted: 08/09/2022] [Indexed: 11/27/2022]
Abstract
Most dogs with immune mediated haemolytic anaemia (IMHA) are hypercoagulable, as measured by thromboelastography (TEG). Thromboelastography-platelet mapping (TEG-PM) has been used to assess platelet function in human patients treated with aspirin or clopidogrel. The aim of this study was to compare platelet thromboxane A2-receptor inhibition (TXA2-RI) and platelet adenosine diphosphate (ADP)-receptor inhibition (ADP-RI) as measured by TEG-PM in dogs with primary IMHA receiving aspirin or clopidogrel to determine if TEG-PM might be useful to monitor treatment. Eighteen client-owned dogs with IMHA were enroled in a prospective double blinded study. Dogs were randomised to receive aspirin or clopidogrel in addition to standard therapy. Thromboelastography was measured before, and 1 and 4 days after commencing treatment. Thromboelastography-PM was performed on days 1 and 4. Non-responders were defined as < 50 % platelet thromboxane A2-receptor inhibition (TXA2-RI) in the aspirin group and < 50 % platelet adenosine diphosphate (ADP)-receptor inhibition (ADP-RI) in the clopidogrel group, on day 4. Mean platelet TXA2-RI and platelet ADP-RI were not significantly different between groups at any timepoint (P > 0.05). The overall mean percentage inhibition of TXA2-receptor was 25 % (aspirin 33 %, clopidogrel 15 %), and of ADP-receptor was 82 % (aspirin 83 %, clopidogrel 80 %). On day 4, 6/9 dogs (66 %) in the aspirin group and 2/8 dogs (25 %) in the clopidogrel group were non-responders (P = 0.086). Two dogs defined as responders based on TEG-PM developed thromboembolism. Overall, there was no significant difference in efficacy between aspirin and clopidogrel based on measurement of receptor inhibition using TEG-PM (P > 0.05), and routine TEG was not reliable for monitoring treatment response in dogs with IMHA. In some dogs, there was a discrepancy between TEG-PM results and clinical response. Further investigation of TEG-PM use in dogs, including its usefulness to monitor treatment response and adjust treatment in individual dogs and any effect of anaemia, is warranted.
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Prescribing habits for the use of omeprazole as a gastroprotectant in dogs in a veterinary teaching hospital. J Small Anim Pract 2022; 63:769-775. [PMID: 35840131 DOI: 10.1111/jsap.13531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/24/2022] [Accepted: 06/14/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To examine the prescribing habits for omeprazole in a veterinary teaching hospital and to evaluate the effect of a clinical audit on omeprazole prescription. MATERIAL AND METHODS Observational study with retrospective clinical audit followed by a prospective study. The evaluated data about omeprazole prescription included the dose, frequency and indication. These were assessed according to published guidelines. A seminar about the audit and current guidelines on the use of omeprazole was organised for all members of clinical staff. Prospective data collection was conducted after the seminar. A comparison of the collected data before and after the clinical audit was made. RESULTS A total of 301 dogs were prescribed omeprazole in the veterinary teaching hospital during the study period (including the retrospective and prospective parts). Complete data were acquired from 240 patients. The prescribed frequency of omeprazole was inappropriate in 23 (16.5%) of the prescriptions in the retrospective section but in only five (5.0%) in the prospective study. Inappropriate indications were reported in 12 (8.6%) patients in the retrospective section and in two patients (2.0%) in the prospective study. Overall inappropriate omeprazole prescription was identified in 34 (24.5%) patients in the retrospective part and in seven (6.9%) patients in the prospective part. There was a statistically significant difference between the two groups in frequency, indication and overall prescription of omeprazole. CLINICAL SIGNIFICANCE This study details the frequency of inappropriate prescription of omeprazole in a veterinary teaching hospital and provides some evidence that dissemination of guidelines based on clinical audit can improve prescribing habits.
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RE-ARMing the Immune Response to Bladder Cancer with Radiotherapy. Clin Oncol (R Coll Radiol) 2022; 34:421-425. [PMID: 34998656 DOI: 10.1016/j.clon.2021.12.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/07/2021] [Accepted: 12/22/2021] [Indexed: 12/15/2022]
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HERMES: Delivery of a Speedy Prostate Cancer Treatment. Clin Oncol (R Coll Radiol) 2022; 34:426-429. [PMID: 35093251 PMCID: PMC8802653 DOI: 10.1016/j.clon.2022.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/23/2021] [Accepted: 01/04/2022] [Indexed: 12/27/2022]
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OC-0105 PROMPTS RCT of screening MRI for spinal cord compression in prostate cancer (ISRCTN74112318). Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02481-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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710 IPC STOCKINGS FOR VTE PREVENTION IN STROKE: BENEFITS OF INTRODUCING ELECTRONIC PRESCRIPTIONS AND WARD ROUND PROMPTS. Age Ageing 2022. [DOI: 10.1093/ageing/afac034.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
A fully completed audit cycle, performed by doctors on the Stroke Unit at Royal Lancaster Infirmary (RLI) which is a combined acute and rehabilitation ward in a university teaching hospital.
Introduction
Deep vein thrombosis (DVT) and pulmonary embolism (PE) are common complications of hemiplegic stroke. Evidence shows that IPCs (intermittent pneumatic compression devices) reduce the risk of DVT. Recent data from SSNAP reports that IPCs are only used in 33% of all stroke patients. We aimed to improve our local standards in the prescription of IPCs for stroke patients within 3 days of admission, thus reducing the incidence of VTE (venous thromboembolism).
Methods
Data was collected retrospectively from patient records of all stroke patients discharged over a one-month period for each of 2 audit cycles. Prescribing is electronic based at RLI. After the first cycle we initiated a prompt on the electronic VTE pro forma to initiate prescribing. We also changed the prescribing default to regular instead of when required, requiring staff to document when they were not given and the reasons why.
Results
Between the first and second cycle, completion of VTE proformas improved to 100% and VTE incidence reduced from 7.6% to 0. Overall, there was a large improvement in prescribing IPCs within the first 3 days of admission. 71% of patients reviewed in the second cycle had IPCs prescribed compared to 37% in the first.
Conclusion
Adherence to local standards in prescribing of IPCs within 3 days of admission markedly improved after the Introduction of electronic ward round prompts and prescriptions and the incidence of VTE decreased to zero. The prescribing prompts encouraged increased documentation of administering of IPCs. There are still some issues concerning documentation and prescribing of anticoagulants which will be tackled by implementing teaching sessions and updating our electronic prescribing prompts.
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Employing a patient with lived experience of musculoskeletal disease to assist service transformation. Physiotherapy 2022. [DOI: 10.1016/j.physio.2021.12.199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Dropout or Early Treatment Response Among Gamblers with Depressive Symptoms. Int J Ment Health Addict 2022. [DOI: 10.1007/s11469-021-00586-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Nurse-led intervention to decrease drug use among LTBI positive homeless adults. Public Health Nurs 2022; 39:778-787. [PMID: 35014087 DOI: 10.1111/phn.13044] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND People experiencing homelessness (PEH) are disproportionately diagnosed with active tuberculosis. While promoting latent tuberculosis infection (LTBI) treatment has been a call to action, PEH engaging in substance use often experience challenges in completing LTBI treatment. METHODS In this non-randomized single arm study, we tested an innovative, community-based, nurse-led community health worker (RN-CHW) model, on reducing drug use among 50 PEH, residing in homeless shelters or living on the streets in Los Angeles. Follow-up was at 3- and 6- months. RESULTS Findings revealed significant and ongoing decrease in any drug use (odds ratio [OR] = 0.30; 95% confidence interval [CI] = 0.14-0.68); p = .004), amphetamine use (OR = 0.14; 95% CI = 0.02-0.81; p = .029), cannabis use (OR = 0.26; 95% CI = 0.12-0.57; p = .001) and methamphetamine use (OR = 0.30; 95% CI = 0.10-0.90; p = .031) at 6-month follow-up. CONCLUSIONS To our knowledge, this pilot study is the first to evaluate the impact a RN-CHW delivered intervention on reduction in drug use among PEH enrolled in a LTBI intervention. LTBI interventions may serve as an entryway into reduction in drug use among this underserved population.
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Effect of Spirulina platensis supplementation on growth, performance and body conformation of two Omani goat breeds. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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EP.FRI.943 Time to surgical review in NELA patients. Br J Surg 2021. [DOI: 10.1093/bjs/znab312.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Introduction
The Royal College of Surgeons standards on unscheduled surgical care state that an ST3 or above should review emergency cases within 60 minutes of referral from the Emergency Department (ED).
Method
Data was gathered from all admissions (n = 50), from 01/9/19 to 31/10/19, registered on the National Emergency Laparotomy Audit (NELA). After exclusions, there were 20 patients who were admitted to surgery from ED. 14 of these had both time of referral and time of review documented.
Results
On average, patients were reviewed 2 hours and 23 minutes after referral. 9 of these patients (64%) were referred overnight (20:00-08:00) and their average time to review was longer; 2 hours and 49 minutes. 7 of all 50 NELA patients (14%) were never referred to surgery from ED.
Conclusion
Limitations include that ED doctors did not document what time patients were referred to surgery, and a small sample size; partially due to poor documentation.
The recommended 60 minutes time to registrar review is not being achieved but data is limited. To improve this, surgical registrars will be asked to document time of referral. Data on time to review will continue to be gathered. An abdominal pain pathway will be introduced to improve ED’s recognition of surgical patients. A re-audit which will encompass patients admitted via ED and ambulatory care, as well as including data on time to decision to operate is currently underway.
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Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector. PHYSICAL REVIEW LETTERS 2021; 127:151803. [PMID: 34678031 DOI: 10.1103/physrevlett.127.151803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/11/2021] [Accepted: 09/10/2021] [Indexed: 06/13/2023]
Abstract
We present a search for the decays of a neutral scalar boson produced by kaons decaying at rest, in the context of the Higgs portal model, using the MicroBooNE detector. We analyze data triggered in time with the Fermilab NuMI neutrino beam spill, with an exposure of 1.93×10^{20} protons on target. We look for monoenergetic scalars that come from the direction of the NuMI hadron absorber, at a distance of 100 m from the detector, and decay to electron-positron pairs. We observe one candidate event, with a standard model background prediction of 1.9±0.8. We set an upper limit on the scalar-Higgs mixing angle of θ<(3.3-4.6)×10^{-4} at the 95% confidence level for scalar boson masses in the range (100-200) MeV/c^{2}. We exclude, at the 95% confidence level, the remaining model parameters required to explain the central value of a possible excess of K_{L}^{0}→π^{0}νν[over ¯] decays reported by the KOTO collaboration. We also provide a model-independent limit on a new boson X produced in K→πX decays and decaying to e^{+}e^{-}.
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Co-occurrence statistics from vision and language capture thematic relationships between objects. J Vis 2021. [DOI: 10.1167/jov.21.9.2779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Measurement of the flux-averaged inclusive charged-current electron neutrino and antineutrino cross section on argon using the NuMI beam and the MicroBooNE detector. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.104.052002] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
In July 2016, a mummified carcass of an ancient wolf (Canis lupus) pup (specimen YG 648.1) was discovered in thawing permafrost in the Klondike goldfields, near Dawson City, Yukon, Canada (Figure 1A). The wolf pup mummy was recovered along a small tributary of Last Chance Creek during hydraulic thawing that exposed the permafrost sediment in which it was preserved. This mummified wolf pup is important to the local Tr'ondëk Hwëch'in people, who named it Zhùr, meaning 'wolf' in the Hän language of their community. Here, we report detailed morphometric, isotopic, and genetic analyses of Zhùr that reveal details of her appearance, evolutionary relationships to other wolves and short life-history and ecology. Zhùr is the most complete wolf mummy known. She lived approximately 57,000 years ago and died in her den during a collapse of the sediments. During her short life, she ate aquatic resources, and is related to ancient Beringian and Russian gray wolves and her clade is basal to all living gray wolves. VIDEO ABSTRACT.
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OC-0289 Comparison of side effects at 2 years in the randomised PACE-B trial (SBRT vs standard radiotherapy). Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)06839-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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OC-0513 Acute toxicity of hypo- and conventionally-fractionated radiosensitised bladder radiotherapy. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)06939-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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The Development of Therapeutic Radiographers in Imaging and Adaptive Radiotherapy Through Clinical Trial Quality Assurance. Clin Oncol (R Coll Radiol) 2021; 33:461-467. [PMID: 33766503 DOI: 10.1016/j.clon.2021.02.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/29/2021] [Accepted: 02/17/2021] [Indexed: 02/06/2023]
Abstract
AIMS Adaptive radiotherapy (ART) is an emerging advanced treatment option for bladder cancer patients. Therapeutic radiographers (RTTs) are central to the successful delivery of this treatment. The purpose of this work was to evaluate the image-guided radiotherapy (IGRT) and ART experience of RTTs before participating in the RAIDER trial. A plan of the day (PoD) quality assurance programme was then implemented. Finally, the post-trial experience of RTTs was evaluated, together with the impact of trial quality assurance participation on their routine practice. MATERIALS AND METHODS A pre-trial questionnaire to assess the experience of the RTT staff group in IGRT and ART in bladder cancer was sent to each centre. Responses were grouped according to experience. The PoD quality assurance programme was implemented, and the RAIDER trial commenced. During stage 1 of the trial, RTTs reported difficulties in delivering PoD and the quality assurance programme was updated accordingly. A follow-up questionnaire was sent assessing experience in IGRT and ART post-trial. Any changes in routine practice were also recorded. RESULTS The experience of RTTs in IGRT and ART pre-trial varied. For centres deemed to have RTTs with more experience, the initial PoD quality assurance programme was streamlined. For RTTs without ART experience, the full quality assurance programme was implemented, of which 508 RTTs completed. The quality assurance programme was updated (as the trial recruited) and it was mandated that at least one representative RTT (regardless of pre-trial experience) participated in the update in real-time. The purpose of the updated quality assurance programme was to provide further support to RTTs in delivering a complex treatment. Engagement with the updated quality assurance programme was high, with RTTs in 24/33 centres participating in the real-time online workshop. All 33 UK centres reported all RTTs reviewed the updated training offline. Post-trial, the RTTs' experience in IGRT and ART was increased. CONCLUSION Overall, 508 RTTs undertook the PoD quality assurance programme. There was a high engagement of RTTs in the PoD quality assurance programme and trial. RTTs increased their experience in IGRT and ART and subsequently updated their practice for bladder cancer and other treatment sites.
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U.S. student pharmacist perceptions of the pharmacist's role in methadone for opioid use disorder: A qualitative study. SAGE Open Med 2021; 9:20503121211022994. [PMID: 34158941 PMCID: PMC8182209 DOI: 10.1177/20503121211022994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/18/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Of the over 20 million Americans reporting an opioid use disorder, only around 3 million report receiving treatment of any kind. The gold standard for opioid use disorder treatment is medication in combination with psychosocial support, but despite robust evidence supporting treatment, barriers are substantial and include limited insurance coverage, patient beliefs, ease of access, regulatory hurdles, and stigma. Although trained as medication experts, U.S. pharmacists are not routinely involved in opioid use disorder treatment and may represent an underutilized care team member. OBJECTIVE To explore U.S. pharmacy students' perspectives on pharmacists as providers of methadone-based medications for opioid use disorder treatment. METHODS A qualitative design with focus groups of student pharmacists in a U.S. college of pharmacy in the Southeastern United States. RESULTS Over 2 months in 2020, three focus groups were conducted with 15 students in each group participating, and including second-, third-, and fourth-year student pharmacists. Three overarching themes emerged from the data: (1) student pharmacists desire exposure to therapeutic knowledge and lived experiences related to opioid use disorder and methadone treatment, (2) students perceive stigmatizing views held by practicing pharmacists toward opioid use disorder and methadone treatment, (3) pharmacists should play a role in methadone treatment. CONCLUSION Student pharmacists desire an active and larger role in the care of patients managing opioid use disorder. Findings indicate these students perceive less stigma toward opioid use disorder than currently practicing pharmacists. Pharmacy curricula should emphasize stories of lived experiences of patients with opioid use disorder, therapeutic knowledge and guidelines related to medications for opioid use disorder, and the regulatory environment surrounding opioid use disorder treatment.
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Advancing Radiotherapy for Bladder Cancer: Randomised Phase II Trial of Adaptive Image-guided Standard or Dose-escalated Tumour Boost Radiotherapy (RAIDER). Clin Oncol (R Coll Radiol) 2021; 33:e251-e256. [PMID: 33766502 DOI: 10.1016/j.clon.2021.02.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 01/18/2021] [Accepted: 02/19/2021] [Indexed: 11/21/2022]
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37 The latzko procedure: A classic approach to vesicovaginal fistula repair. Am J Obstet Gynecol 2021. [DOI: 10.1016/j.ajog.2021.04.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Convolutional neural network for multiple particle identification in the MicroBooNE liquid argon time projection chamber. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.103.092003] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ancient horse genomes reveal the timing and extent of dispersals across the Bering Land Bridge. Mol Ecol 2021; 30:6144-6161. [PMID: 33971056 DOI: 10.1111/mec.15977] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/24/2021] [Accepted: 04/27/2021] [Indexed: 01/02/2023]
Abstract
The Bering Land Bridge (BLB) last connected Eurasia and North America during the Late Pleistocene. Although the BLB would have enabled transfers of terrestrial biota in both directions, it also acted as an ecological filter whose permeability varied considerably over time. Here we explore the possible impacts of this ecological corridor on genetic diversity within, and connectivity among, populations of a once wide-ranging group, the caballine horses (Equus spp.). Using a panel of 187 mitochondrial and eight nuclear genomes recovered from present-day and extinct caballine horses sampled across the Holarctic, we found that Eurasian horse populations initially diverged from those in North America, their ancestral continent, around 1.0-0.8 million years ago. Subsequent to this split our mitochondrial DNA analysis identified two bidirectional long-range dispersals across the BLB ~875-625 and ~200-50 thousand years ago, during the Middle and Late Pleistocene. Whole genome analysis indicated low levels of gene flow between North American and Eurasian horse populations, which probably occurred as a result of these inferred dispersals. Nonetheless, mitochondrial and nuclear diversity of caballine horse populations retained strong phylogeographical structuring. Our results suggest that barriers to gene flow, currently unidentified but possibly related to habitat distribution across Beringia or ongoing evolutionary divergence, played an important role in shaping the early genetic history of caballine horses, including the ancestors of living horses within Equus ferus.
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Comparison of provider satisfaction with specialty pharmacy services in integrated health-system and external practice models: A multisite survey. Am J Health Syst Pharm 2021; 78:962-971. [DOI: 10.1093/ajhp/zxab079] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Abstract
Purpose
The purpose of this study is to obtain insight into providers’ satisfaction with services offered by health-system integrated specialty pharmacies and to determine whether providers’ perceptions of services offered under an integrated model differ from perceptions of external specialty pharmacy services.
Methods
A multi-site, cross-sectional, online survey of specialty clinic healthcare providers at 10 academic health systems with integrated specialty pharmacies was conducted. The questionnaire was developed by members of the Vizient Specialty Pharmacy Outcomes and Benchmarking Workgroup and was pretested at 3 pilot sites prior to dissemination. Prescribers of specialty medications within each institution were identified and sent an email invitation to participate in the study that included a link to the anonymous questionnaire. Respondents were asked to rate their agreement with 10 statements regarding quality of services of integrated and external specialty pharmacies on a 5-point scale (1 = strongly disagree, 5 = strongly agree). An analysis to determine differences in providers’ overall satisfaction with the integrated and external specialty pharmacy practice models, as well as differences in satisfaction scores for each of the 10 statements, was performed using paired-samples t tests.
Results
The mean (SD) score for overall satisfaction with integrated specialty pharmacies was significantly higher than the score for satisfaction with external specialty pharmacies: 4.72 (0.58) vs 2.97 (1.20); 95% confidence interval, 1.64-1.87; P < 0.001. Provider ratings of the integrated specialty pharmacy model were also higher for all 10 items evaluating the quality of services (P < 0.05 for all comparisons).
Conclusion
The study results confirm that the health-system integrated specialty pharmacy practice model promotes high rates of provider satisfaction with services and perceived benefits.
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Failing to Close the Gap Between Evidence and Clinical Practice in Radical Bladder Cancer Radiotherapy. Clin Oncol (R Coll Radiol) 2021; 33:46-49. [PMID: 32762980 DOI: 10.1016/j.clon.2020.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/12/2020] [Accepted: 07/01/2020] [Indexed: 12/18/2022]
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First Measurement of Differential Charged Current Quasielasticlike ν_{μ}-Argon Scattering Cross Sections with the MicroBooNE Detector. PHYSICAL REVIEW LETTERS 2020; 125:201803. [PMID: 33258649 DOI: 10.1103/physrevlett.125.201803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/11/2020] [Accepted: 10/02/2020] [Indexed: 06/12/2023]
Abstract
We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (ν_{μ}) scattering on argon with a muon and a proton in the final state, ^{40}Ar (ν_{μ},μp)X. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59×10^{19} protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of (4.93±0.76_{stat}±1.29_{sys})×10^{-38} cm^{2}, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.
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