Chronic dialysis and dialysis doctors in the United States: a nephrologist-historian's perspective.

In an earlier article in Seminars in Dialysis (9:276-281, 1996), the author described the invention of clinical hemodialysis for acute renal failure and its initially equivocal reception by the emerging specialty of nephrology in the United States. A similar story of blunted enthusiasm played out following the invention of the Quinton-Scribner shunt (whose idea "came in the night"), which allowed maintenance treatment for chronic renal failure. Few centers at first could match Belding Scribner's early successes, and some physiology-oriented university nephrologists envisioned how routine dialysis might swamp other activities. Nonetheless, increasingly complex and successful inventions appeared and prevailed: the chronic dialysis unit, the national dialysis chain. A unique federal entitlement program fostered the spread of maintenance dialysis, but so did the emergence of disposable off-the-shelf supplies and many new nephrologists trained in academia but seeking positions in practice. Indeed, the spread of end-stage renal disease (ESRD) care transformed American nephrology. The essay concludes by considering what nephrologists of the ESRD era share with their patients.

Physical diagnosis findings among persons applying to work as standardized patients.

Sixty-six applicants for work as standardized patients (SPs) at a clinical skills assessment program underwent a physical examination. Murmurs, wheezes, hypertension, and goiter were found, which, if unaccounted for, could have influenced examinees' performances and diagnostic thinking.

Effect of training location on students' clinical skills.

The clinical skills of second-year medical students trained in a hospital-based setting were compared with those of students trained in a community setting using an objective structured clinical exam. No statistically significant difference was found.

Origins and early reception of clinical dialysis.

Several medical inventors in Europe and North America brought the artificial kidney (hemodialysis) to practical usefulness in the late 1940s, but there were very few early successes. It was used at first for only desperate cases of acute renal failure. Renal authorities in the 'metabolic' tradition favored newly quantified metabolic and dietetic therapies. In part, this resistance to dialysis represented reasonable skepticism about results, but also preferences concerning what constituted 'science' within medicine.

Physical diagnosis skills of physicians in training: a focused assessment.

OBJECTIVE: To assess the proficiency of emergency medicine (EM) trainees in the recognition of physical findings pertinent to the care of the critically ill patient. METHODS: Fourteen medical students, 63 internal medicine (IM) residents, and 47 EM residents from three university-affiliated programs in Philadelphia were tested. Proficiency in physical diagnosis was assessed by a multimedia questionnaire targeting findings useful in emergencies or related to diseases frequently encountered in the ED. Attitudes toward diagnosis not based on technology, teaching practices of physical examination during EM training, and self-motivated learning of physical diagnosis also were assessed for all the EM trainees. RESULTS: With the exception of ophthalmology, the EM trainees were never significantly better than the senior students or the IM residents. They were less proficient than the IM residents in cardiology, and not significantly different from the IM residents in all other areas. For no organ system tested, however, did they achieve less than a 42.9% error rate (range: 42.9-72.3%, median = 54.8%). There was no significant improvement in proficiency over the three years of customary EM training. The EM residents who had received supervised teaching in physical diagnosis during training achieved a significantly higher cumulative score. The EM residents attributed great clinical importance to physical diagnosis and wished for more time devoted to its teaching. CONCLUSIONS: These data confirm the recently reported deficiencies of physical diagnosis skills among physicians in training. The results are particularly disturbing because they relate to EM trainees and concern skills useful in the ED. Physical diagnosis should gain more attention in both medical schools and residency programs.

Creation and assessment of a structured review course in physical diagnosis for medical residents.

OBJECTIVE: To evaluate the effects of a course in physical diagnosis on the knowledge, skills, and attitudes of internal medicine trainees. DESIGN: A controlled, prospective assignment of housestaff to a year-long curricular program, linked to a set of pre- and posttests. Houseofficers who could not attend the teaching sessions functioned as control subjects. SETTING: An internal medicine training program at an urban medical school. SUBJECTS: 56 (86.1%) of 65 eligible internal medicine housestaff (post-graduate years 1 through 3) participated in the intervention and assessment. A comparison group of 14 senior medical students participated in the pretest. INTERVENTION: 12 monthly lectures emphasizing skills useful in emergencies or validated by the literature. MEASUREMENTS: The pre- and posttests included: 1) a multiple-choice questionnaire to assess knowledge; 2) professional standardized patients to assess selected skills; and 3) Likert-type questionnaires to assess self-motivated learning and attitude toward diagnosis not based on technology. MAIN RESULTS: The residents expressed interest in the program and on a six-point scale rated the usefulness of lectures and standardized patients as 3.5 +/- 1.3 and 4.3 +/- 1, respectively. For no system tested, however, did they achieve more than 55.2% correct answers (range: 24.2%-55.2%, median = 41.04), and their performance did not differ from that of the fourth-year medical students. There was no significant difference in pre/posttest improvement between the control and intervention groups. CONCLUSIONS: These data confirm the deficiencies of physical diagnostic skills and knowledge among physicians in training. These deficiencies were not corrected by the classroom lecture series. Improvement in these skills may require a more intense experiential program made part of residency requirements.

Postprandial blood pressure decrease in well elderly persons.

To learn if postprandial reduction in blood pressure occurs in active, very well elderly persons, we identified 16 such subjects over the age of 75 years, free of cardiovascular disease, taking no drug affecting blood pressure control. Each underwent measurement of seated and standing blood pressure and heart rate before and after a standard breakfast and before and after a volume of water (control). Eight young persons underwent the measurements before and after the meal. The elderly but not the young showed a significant fall in systolic and diastolic pressures after the meal, with heart rate increases in some subjects clearly inadequate for the decline in systemic pressure. No symptoms were seen. But postprandial decrease in blood pressure may in some less robust elderly persons be a factor in syncope and falls. This change may also confuse the monitoring of antihypertensive treatment in older outpatients.

From dropsy to Bright's disease to end-stage renal disease.

Clinical concepts--labels placed on categories of sickness--are essential to both the physician's and the patient's understanding of a disease. The changing use of labels in renal medicine reflected how physicians and others thought about kidney disease, each new label suggesting increasing complexity in the encounter of renal patient and physician. While dropsy referred to symptoms easily perceived by the patient as well as the physician, Bright's disease focused mainly on microscopic pathology invisible to the patient. Most removed from palpable symptoms is end-stage renal disease, a diagnosis often uncovered by autoanalyzer, defined by the need for dialysis, and formally bestowed by government. This process of definition and redefinition demands the attention of scholars because it reveals much about the evolution of medical thought and practice.