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Biomedical subjects

D Samuels

Publications and source records attributed to D Samuels.

14 recordsLinked to original sources
PubMed2006

An audit of gynaecological procedures in Jehovah's Witnesses in an inner city hospital.

A retrospective study of Jehovah Witness women between January 1994 and December 2003 was performed. Gynaecologists are concerned about operating on Jehovah's Witnesses because of the potential for haemorrhage during surgery. Jehovah's Witnesses do not accept donor blood but some will permit their own blood to be stored pre-operatively and administered during surgery if deemed necessary. Approximately 150,000 Jehovah's Witnesses live in the UK but little on gynaecological procedures in Jehovah's Witnesses has been published. There were 64 procedures (14 major, 18 intermediate and 32 minor) in 53 women with a median age of 42 years. There were no perioperative deaths, but postoperative anaemia was common. Our study showed that major, intermediate and minor gynaecological procedures can be performed without significant morbidity on Jehovah's Witnesses but a protocol should be available to outline management of those who refuse blood.

Adolescent↗
PubMed2004

A survey of chronic renal failure in Jamaica.

The prevalence of chronic renal failure (CRF)/end stage renal disease and the accessibility of long term renal replacement therapy in Jamaica were evaluated. The study was conducted at six Jamaican healthcare facilities between July 1998 and December 1999 and included 605 patients with CRF. Men with CRF (57% of patients, mean age of 56.7 years) were significantly older than women (mean age 53.2 years). Hypertension was the most commonly associated medical condition (60.8% of patients) followed by diabetes mellitus (31.4% of patients). The estimated crude point prevalence of CRF in persons 20 years and over at the end of 1999 was 327 per million population. More than one-third of patients with CRF (39%) were receiving renal replacement therapy, the most common modality being haemodialysis, and only 1.8% of patients had received kidney transplantation. The prevalence of chronic renal failure was not increased in areas known to have high soil cadmium levels. Chronic renal failure is a significant public health problem in Jamaica and is placing an increasing financial burden on the healthcare sector.

Adult↗
PubMed2001

Renal multigated spectral Doppler imaging before and after captopril challenge.

RATIONALE AND OBJECTIVES: A new method of measurement, simultaneous multigated spectral Doppler imaging (MSDI), was used to quantify the hemodynamic changes in kidneys after administration of captopril. METHODS: Forty kidneys in 22 hypertensive patients were included in the study. All underwent MSDI and scintigraphy before and after administration of captopril. RESULTS: With scintigraphy used as the gold standard for diagnosing renal artery stenosis (RAS), three kidneys were found to be positive for RAS. Multigated spectral Doppler imaging detected a decrease in the resistive index after administration of captopril in all patients with RAS and correctly excluded RAS in one patient who was diagnosed as having RAS on scintigraphy. The resistive index was increased after captopril administration in normally functioning kidneys and was unchanged in kidneys with impaired function. CONCLUSIONS: With further supportive evidence, MSDI may prove to be a powerful tool for the acquisition of resistive index information and may increase the value of the resistive index as a physiological hemodynamic parameter in the evaluation of normal and abnormal conditions.

Adolescent↗
PubMed1989

Smooth landings. A safe approach to air medicine.

As the number of patients transported by air medical services increases, so do concerns over safety in the skies. The NTSB and air medical associations are making strides in imposing safety controls and exploring other options that will improve the industry's safety record.

Aircraft↗
PubMed1983

Ultrasonographic determination of renal mass and renal volume.

Volumes and surface areas of 45 kidneys were determined ultrasonographically in vivo before autopsy and in a water bath phantom after autopsy by means of both the ellipsoid and the stepped section methods. Comparison of results revealed that renal volume may be determined by the simplest method, the ellipsoid method, with sufficient accuracy for clinical use. Results also revealed that renal mass expressed in grams may be directly obtained from renal volume expressed in milliliters, but mass in grams was found to correlate better with renal surface area than with renal volume. A formula relating renal mass to both volume and surface area was developed from regression analysis of the data and was found to provide a more precise estimate of renal mass than does mass computed from either volume or surface area alone.

Humans↗
PubMedDate not supplied

Femoral artery pseudoaneurysm: Doppler sonographic features predictive for spontaneous thrombosis.

PURPOSE: The objective of this prospective study was to evaluate whether Doppler imaging characteristics can be used to predict spontaneous thrombosis of femoral artery pseudoaneurysms (PAs). METHODS: Eleven post-cardiac catheterization PAs were monitored with color Doppler sonography. Total volume of the lesion, volume filled with free-flowing blood, length and width of the neck of the PA, and its anatomic position were evaluated. RESULTS: All of the PAs in our series underwent spontaneous thrombosis. PAs with necks 0.9 cm or longer underwent spontaneous thrombosis in 9.8 days on average, while PAs with necks shorter than 0.9 cm required an average of 52 days to thrombose. CONCLUSIONS: PAs with longer neck lengths are more likely to thrombose in a shorter period than are those with shorter necks. It may thus be worthwhile to await spontaneous resolution when the aneurysmal neck length is 0.9 cm or more.

Aneurysm, False↗
PubMedDate not supplied

From sister to manager.

Explore the source record for details and available documents.

Administrative Personnel↗
PubMedDate not supplied

Audit pinpoints i.v. drug administration pitfalls.

This paper describes an approach to auditing the time spent by nurses giving intravenous drugs. The results of the audit, carried out at Wycombe General Hospital, are reported and discussed together with the measures taken to address practical and medico-legal issues. The authors conclude that much nursing time could be saved with closer adherence to guidelines for practice.

Drug Therapy↗