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Biomedical subjects

J L Haynes

Publications and source records attributed to J L Haynes.

At least 37 records · Page 2Linked to original sources
PubMed1987

Stair climbing as an indicator of pulmonary function.

Seventy male patients with a mean age of 56.8 years scheduled for pulmonary function testing were subjected to a stair climb in order to determine the relationship, if any, between the number of steps climbed and the results of pulmonary function testing. The number of steps completed was plotted against the different parameters which may be used as predictors of post-thoracotomy outcome. The stair climb acts as a stress test and, although there is a strong relationship to pulmonary function tests, it also is an indicator of many other parameters including cardiovascular status, cooperation, and determination. Based on results of this study, the stair climb can be used as a reliable screening test of pulmonary function. Also, preoperative patients who are unable to perform pulmonary function tests can be evaluated accurately for lung resection by use of the stair climb test.

Adult↗
PubMed1985

Carotid endarterectomy. One solution to the stroke problem.

Stroke is most often the result of extracranial cerebral artery disease; stroke carries a high initial mortality and morbidity and portends an increased risk of subsequent stroke or myocardial infarction. Stroke is also a preventable disease in more than one half of patients, either by approximate treatment of premonitory transient ischemic attacks or by appropriate evaluation of otherwise asymptomatic carotid bruits. Combined patient education and referring physician awareness should result in a declining incidence of stroke in this country. Two hundred carotid endarterectomies were performed over a 4-year period by senior residents under the direct supervision of the authors. Operative mortality was 1.5 per cent; perioperative stroke, 1.5 per cent; temporary neurologic deficit, 1 per cent; and temporary cranial nerve injury, 1 per cent. Analysis of these patients and of the literature supports an aggressive approach to carotid endarterectomy for patients with focal transient ischemic attacks and a more cautious approach for patients with prior stroke or asymptomatic stenoses.

Adult↗
PubMed1984

Lower extremity amputation for peripheral vascular disease. A low-risk operation.

Two hundred fifty-three consecutive major amputations of the lower extremity for peripheral vascular insufficiency were performed over a 3-year period. Operative mortality was 0.9 per cent for 113 below-knee and 2.8 per cent for 140 above-knee amputations. Although lower extremity amputation has a reputation for high mortality and morbidity, this is unwarranted; adherence to a protocol of aggressive medical management with timely surgical intervention allows a mortality that is appropriate to the age and general debility of this patient population.

Aged↗
PubMed1984

Synthetic vascular graft infection. The continuing headache.

Twenty synthetic vascular graft infections are reviewed. Diagnosis of aortic shaft infections has been improved by combined CAT and Gallium scanning, with a 100 per cent sensitivity and specificity. An increasing incidence (70%) of gram-negative or resistant infections is noted, with a correspondingly high mortality. Delay in diagnosis resulted in an 100 per cent mortality versus 20 per cent when diagnosis was made rapidly. Mortality was usually from sepsis, but nearly half of the deaths occurred due to stroke or myocardial infarction.

Anti-Bacterial Agents↗
PubMed1983

Determining the content of a surgical curriculum.

The purpose of undergraduate surgical education is to prepare the student for both the residency and eventual practice of medicine. To help determine the surgical knowledge and skills that would eventually the useful to the student, we conducted a survey of residents in training, physicians in practice, and surgical educators (department chairpersons and clerkship directors). Members of the Curriculum Committee of the Association for Surgical Education developed a questionnaire in which the respondents were asked to grade the functional importance of 84 areas of knowledge and 46 skills (0 = unnecessary, 3 = proficiency necessary). Using a modified Delphi technique to collect information, we sent the questionnaire to eight medical school graduation classes of 1975 (730 persons) and 1980 (776 persons) and all department chairpersons and/or clerkship directors (179). The results of the survey (46% response) revealed considerable agreement about the importance of certain skills and areas of knowledge, enabling us to rank order skills and knowledge based on mean responses (0.0 to 3.0). Physicians in practice, residents, and educators believed that certain areas of knowledge (e.g., acute abdominal problems, appendicitis, shock, cancer of the breasts) and skills (e.g., history taking and physical examination, gowning, suture removal) were very important (greater than 2.250, while other areas of knowledge (e.g., transplantation, liver abscess, soft tissue sarcomas) and skills (e.g., insertion of Swan-Ganz catheter, abdominal paracentesis, cricothyroidotomy) were less important (less than 1.3). This approach allows us to assign priorities to areas of knowledge and skills when determining curriculum content and to include functional criteria when developing educational objectives.

Attitude of Health Personnel↗
PubMed1980

High-resolution particle analysis--its application to platelet counting and suggestions for further application in blood cell analysis.

The characteristics of an instrument for high-resolution particle analysis in flow are discussed. It employs a combination of hydrodynamic focusing, fluid resistors, and electronic techniques to achieve precision and ease of use heretofore unobtainable in a moderate-cost clinical instrument. Its application to whole blood platelet counting is discussed, and suggestions are made for its possible application to a wide variety of blood cell measurements.

Animals↗
PubMed1978

Stem cells.

Explore the source record for details and available documents.

Cell Count↗
PubMed1977

A possible new nucleoside diphosphatase from the cytosol of soybean and alfalfa nodules.

Nucleoside diphosphatase activity has been found in the cytosol of soybean (Glycine max) and alfalfa (Medicago satavia) nodules. The enzyme differs from other diphosphatases in that it does not exhibit a strong preference for one nucleoside diphosphate over another. Very little, if any, diphosphatase activity was detected in root extracts of alfalfa and soybean seedlings.

Journal Article↗