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Biomedical subjects

S Elder

Publications and source records attributed to S Elder.

10 recordsLinked to original sources
PubMed2006

Hospital transmission of hepatitis B virus in the absence of exposure prone procedures.

In February and in June 1998, two people developed acute hepatitis B following in-patient care in a district general hospital. Initial enquiries indicated their infections were not attributable to staff undertaking exposure-prone procedures (EPPs). We report the findings and implications of the subsequent investigation: a multi-disciplinary, multi-agency investigation, including molecular epidemiological analysis. Occupational Health records showed that staff involved in EPPs with the patients were HBsAg negative. No contact between the patients was identified nor were there failures in sterilization. The patients' HBV strains were identical, indicating a common source. A total of 231 out of 232 staff who might have treated either patient were tested for HBsAg; the remaining doctor, working abroad, was HBsAg- and HBeAg-positive and had the same HBV strain as the patients. On two occasions the doctor's hand had been cut while breaking glass vials, but there was no documentation linking these events to the two patients. The doctor had been vaccinated in 1993 and tested for anti-HBs prior to commencing work in 1997. The doctor was recalled to Occupational Health but did not attend and was not followed up. In total, 4948 patients potentially treated by the doctor received an explanatory letter and 3150 were tested for HBsAg. Only one was positive, and HBV sequencing showed no link to the doctor. Occasionally transmission of HBV from heath-care workers can occur in a non-EPP setting and the implications of this require examination by those setting national policy. Occupational Health Services should investigate clinical heath-care workers who do not respond to vaccination. They should ensure HBV carriers are identified and offer them appropriate advice to prevent transmission to patients.

Adult↗
PubMed2000

Biomechanical evaluation of calcium phosphate cement-augmented fixation of unstable intertrochanteric fractures.

OBJECTIVE: The purpose of this study was to evaluate the mechanical effects of using an injectable calcium phosphate cement, Norian Skeletal Replacement System (SRS), which is replaced by the native remodeling process, to augment sliding hip screw fixation of unstable intertrochanteric fractures in a cadaver model. DESIGN: Ten matched pairs of human cadaver femora were used. One randomly selected femur from each pair was designated as experimental, whereas the contralateral femur served as the control. SETTING: Testing was performed in the Orthopaedic Research Laboratories, The University of Michigan, Ann Arbor, Michigan, U.S.A. PATIENTS/PARTICIPANTS: Femora with no radiographic evidence of pathology and with below-normal bone mineral density in the neck region were accepted into the study. INTERVENTION: Three-part, intertrochanteric fractures were repaired by using a sliding hip screw and sideplate, without replacement of the posteromedial fragment. In the experimental side of each pair, SRS was used to grout the hip screw and to fill the posteromedial defect. MAIN OUTCOME MEASUREMENTS: Femora were subjected to simulated single-leg stance loading to approximately one body weight in a servohydraulic testing machine. Measurements of stiffness, medial bone surface strain, hip screw displacement, and sideplate strain were made in fractured femora. Stiffness and medial bone surface strain baseline data were obtained in the intact bone before fracture creation as well. RESULTS: Augmenting fixation with Norian SRS increased the fracture construct stiffness and minimized sliding hip screw displacement. It also maintained medial bone surface strain closer to the intact state and lowered sideplate strain relative to controls. However, there was no difference in the load to failure between SRS-augmented and control femora. CONCLUSIONS: SRS augmentation of unstable, intertrochanteric fractures significantly improved overall stability, facilitated load transfer across the fracture, and decreased both shortening of the proximal femur and stress on the sliding hip screw.

Aged↗
PubMed1996

Safety of laparoscopic cholecystectomy on a teaching service: a prospective trial.

In a prospective audit of our first 213 laparoscopic cholecystectomies (LC), we compared the results obtained by qualified surgeons to those obtained by residents. The first group started performing LC after undergoing formal laboratory laparoscopic courses. The second group was introduced to LC by standard attending-resident teaching in the operating room. In all, 137 LC wer performed by qualified surgeons and 76 by residents. Patients' clinical and laboratory characteristics were not significantly different in the two groups. The conversion rate to laparotomy (11.5% and 12.5%), mean duration of surgery (88 and 83 min), iatrogenic perforation of the gallbladder (16% and 18.5%), "lost stones" (7% and 4%), use of drains (12% and 13%), and extension of the umbilical port incision (about 30% in both groups) were similar in the two groups. The incidence of biliary (3% and 4%) and infectious (3.5% and 4%) complications was equivalent in both groups. We conclude that with the traditional attending-resident approach to surgical education, residents safely and quickly acquire the necessary skills to perform LC without jeopardizing the safety of patients.

Adult↗
PubMed1977

The choice of rural practice: a longitudinal view.

The geographic maldistribution of physicians in the United States is an issue which more and more medical schools are being forced to address, however changing admissions policies to give preference to rural-oriented students may do little to alleviate the problem. This study analyzes the effectiveness of such a policy and concludes that training at a tertiary medical facility fosters an urbanizing, specializing influence which intervenes in the relationship between hometown background and choice of rural practice location.

Attitude↗
PubMedDate not supplied

Opportunities for improving the care of patients with community-acquired pneumonia.

In Missouri, community-acquired pneumonia is the second leading cause of hospital admission in the Medicare population. Analysis of 1993 discharges revealed that more than 18,000 Medicare patients were admitted to acute care hospitals with a principal diagnosis of pneumonia. Statewide, the case fatality rate for these admissions was 9.6%, with an average length of stay of 8.2 days. Under the auspices of Medicare's Health Care Quality Improvement Program, the Missouri Patient Care Review Foundation (MPCRF) collaborated with five hospitals in the state on a project to enhance the outcomes and quality of care for patients admitted with community-acquired pneumonia. Narrowing the focus to bacterial community-acquired pneumonia, the five hospitals agreed to collect data, for a specified period, on each Medicare patient admitted with this diagnosis. The hospitals were encouraged to implement recommended critical pathways and guidelines for the initial management and treatment of community-acquired pneumonia. MPCRF assumed responsibility for data management activities for the project as well as production of feedback reports that were shared routinely with the hospitals. Although evaluation of the project continues, preliminary analysis of claims data for admissions occurring after process changes were implemented indicates that there has been improvement in the two outcome measures, patient mortality and length of stay. These results suggest that monitoring of key process indicators, coupled with ongoing analysis and feedback, has potential for facilitating positive change in the quality of care for patients with community acquired pneumonia.

Critical Pathways↗
PubMedDate not supplied

Influenza immunization cooperative project.

During the 1994 flu season, the Missouri Patient Care Review Foundation (MPCRF) began working on a systems-oriented, hospital-focused influenza immunization project for the 1995-96 flu season with four acute care hospitals. The results of the project indicate that a combination of hospital policies, nurse-driven standing order protocols for immunization, and emphasis on beneficiary education resulted in the highest rate of influenza vaccination.

Community Health Planning↗