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Biomedical subjects

P Weinstein

Publications and source records attributed to P Weinstein.

At least 145 records · Page 8Linked to original sources
PubMed1980

Intimal cellular response to microvascular anastomosis.

End-to-end and end-to-side anastomosis was performed on 1--4 mm diameter arteries and veins of dogs using 9--0 suture and microvascular technique. After peraortic in-vivo glutaraldehyde perfusion fixation was performed, specimens were immersed in fixative and later removed for SEM examination of intraluminal surfaces. Platelet and leucocyte aggregation was seen at 24 hours at sites of endothelial disruption. Consecutive stages of neoendothelialization were seen at intervals up to 6 months. Abnormal intimal surfaces are described at sites of high flow or jet stream turbulence in arteriovenous shunts or end-to-side arterial anastomosis. If stenosis of the lumen does not occur, intimal healing and 100% patency rates can be expected.

Animals↗
PubMed1979

Malignant histiocytosis: a cytochemical and electron microscopic study of an unusual case.

A 25-year-old black female presented with lymphadenopathy, fever and anemia of two months duration. The diagnosis of malignant histiocytosis was made on the basis of histiocytic infiltrations in the sinuses of spleen, liver and lymph nodes and by the demonstration of erythrophagocytosis in bone marrow. Following splenectomy, the patient developed a leukemic phase with as many as 50 X 10(9) abnormal histiocytes/l and bone marrow necrosis. This patient was also atypical because of multiple granulomas in liver, spleen and lymph nodes. Cytochemical and immunofluorescent stains confirmed that the abnormal cells were derived from the monocyte-macrophage series. Electron microscopy was used to further characterize this abnormal cell population. The electron microscopic and cytochemical evidence confirms that the malignant cells in malignant histiocytosis are derived from monocytes.

Acid Phosphatase↗
PubMed1979

Patient dental values and their relationship to oral health status, dentist perceptions and quality of care.

In this study, 1287 patients completed a questionnaire assessing knowledge of home care procedures, adherence to home care instructions, obstacles presented to the dentist in delivering care, and ability to pay for optimal care. Ninety-seven dentists that provided treatment for these patients completed a parallel questionnaire. Measures of oral health and the quality of restorative care were based on clinical examinations. It was found that though patient values and dental perceptions were associated, dentist perceptions did not closely match patient dental values. Analysis of variance indicated that patient dental values were related positively to both oral health measures and the quality of restorations. Patient-reported compliance with home care recommendations showed the strongest relationship to both oral health and quality of restorations.

Adult↗
PubMed1979

Communication patterns in pedodontics.

This investigation examined communication patterns between 16 randomly selected senior dental students and their child patients. Interactions were videotaped during a regular treatment appointment and analyzed according to four Practitioner Communication categories and four Child Cooperation categories. Communication categories included Directive Guidance Behavior, Permissive Behavior, Coercive Behavior, and Other Behavior. Child behavior categories included Cooperation, Resistance, Noncooperation, and Other. The probability that a given category of child's behavior would follow a given category of practitioner's behavior was calculated. Results indicated a .85 probability that Directive Guidance would be followed by Cooperation; a .67 probability that Permissiveness would lead to Noncooperation; and a .97 likelihood that Coerciveness would lead to either Noncooperation or Resistance. Practitioners' confidence was also considered; less confident operators account for 95% of the Coercive behaviors, 86% of Permissive behaviors and 87% of Uncooperative behaviors.

Child↗
PubMed1979

A pilot study using remote broadcasting equipment to provide instruction in pedodontics.

This study investigates the value of remote broadcasting equipment in instruction in pedodontics. Twenty students, between their junior and senior years, were randomly chosen and videotaped during an operative dentistry appointment with a child. Ten students reviewed and critiqued their own tapes immediately after the clinic session. Ten students received instruction using remote broadcasting equipment in an attempt to provide cues and immediate feedback. Results indicate the usefulness of remote broadcasting equipment as a new pedagogic technique in pedodontics.

Child Behavior↗
PubMed1979

Manual dexterity as a predictor of quality of care among dental practitioners.

This study explores the relationship between time to complete a manual dexterity exercise and quality of restorative dentistry. Ninety-seven general practitioners volunteered to take part in the study. An average of 14 patients per office were recalled and an average of five recent restorations per patient were examined clinically by trained peer reviewers. Subsequently, 74 of the 97 dentists participated in a session in which the O'Connor Tweezer Dexterity test was administered. Pearson correlations between speed on the test of tweezer dexterity and quality measures indicated that, on the average, those practitioners who took longer to complete the tweezer test achieved significantly higher scores on restorative quality.

Aptitude Tests↗
PubMed1978

Dentists' perceptions of their patients relation to quality of care.

This study investigates dentists' perceptions of their patients and the relation of these perceptions to measures of actual quality of restorative treatment. The results indicate that 1) though the dentists see their patients as "cooperative," they perceived a substantial number of "problems," i.e., willingness to pay for optimal care or follow professional recommendations; and 2) there are significant associations between dentists' perceptions of patients and measures of the quality of restorative treatments; higher quality scores were associated with perceptions of a more cooperative patient.

Dental Restoration, Permanent↗
PubMed1978

Volunteering in dental peer review: differences between volunteers and practitioners at large.

This report characterizes differences among early and late volunteers, and non-volunteers for personal characteristics and situational determinants of volunteering in an experimental dental peer review study. Differences were found for volunteers/non-volunteers for some items representing subject interest, expectation of a favorable evaluation, sociability, and achievement motivation.

Age Factors↗
PubMed1978

Dental examinations for quality control: peer review versus self-assessment.

This paper reports the dental care norms for restorative dentistry collected from examinations of 1,466 patients in 105 dental offices in Washington State during 1976. These results are part of a larger study, "Assessment of Care and Continuing Dental Education," being conducted by the University of Washington with the endorsement and cooperation of the Washington State Dental Association. Treatments in volunteer offices were evaluated either by colleagues (peer review) or by the practitioner himself (self-assessment). Two hundred twenty-four of 1,196 eligible dentists volunteered for the study. Patients from the practitioners' offices were randomly selected from office files by project staff. The study tests the proposition that, using standardized clinical evaluation procedures and comparable samples of treatment, dentists will be more critical of their own work than that of others. Results suggest a generally high level of care provided by volunteer practitioners and that self-assessments were significantly more critical than peer review.

Dental Care↗
PubMed1978

Lateral differences in habituation of ipsilateral head-turning to repeated tactile stimulation in the human newborn.

Lateral differences in habituation of ipsilateral head-turning to repeated tactile perioral stimulation following midline head restriction was studied in 44 full-term neonates. Left-sided stimulation had a significantly greater and faster decremental effect than right-sided stimulation. Even in the absence of tactile stimulation (Control Group), head-turning to the left decreased systematically whereas head-turning to the right did not. The transient efficacy of prior midline head restriction for the elimination of lateral differences in both spontaneous head movements and responsiveness to tactile input suggests that behavioral asymmetry is already well-established in the newborn.

Female↗