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Biomedical subjects

G E Weaver

Publications and source records attributed to G E Weaver.

6 recordsLinked to original sources
PubMed1992

Laparoscopic cholecystectomy: an initial community experience.

The initial 950 consecutive laparoscopic cholecystectomies performed in one city at four hospitals by 30 general surgeons are reported, covering a period from April 4, 1990 to April 3, 1991. There were two operative deaths (0.2%), three common bile duct lacerations (0.3%), two subhepatic abscesses, two bowel perforations, and three bile leaks, two requiring laparotomy. Seven episodes of bleeding occurred, of which five required laparotomy, but none involved a major vessel. Sixty-five procedures were converted to open (6.7%). The mean operative time was 85.4 min. Intraoperative cholangiography was adequately completed in 49.8% and not attempted in 30.3%. Thirteen patients (2.7%) were found to have common duct stones. The pathologic diagnoses were chronic cholecystitis in 784 patients (82.5%), acute cholecystitis in 145 (15.3%), and cancer of the gallbladder in one (0.1%). Hospital stays ranged from 4 h to 31 days (mean 49.5 h). This procedure can be learned and performed safely in a community setting.

Age Factors↗
PubMed1989

[Cardiac performance and hemodynamic response under the effect of isoproterenol and D-isosorbitol in patients with dilated cardiomyopathy].

The authors studied cardiac performance of 36 patients with dilated cardiomiopathy through cardiac catheterization and left ventriculography in comparison with a control group. It has been verified that the end systolic volume (ESV) is more sensitive than ejection fraction (EF) as an indicator of the presence and degree of systolic dysfunction. Isoproterenol (IP) (18 patients) and D-isosorbitol (IS) (18 patients) have been used in the evaluation of hemodynamic response of DM. It has been verified equivalent responses such as: 1--decrease of ESV and end diastolic pressure (EDP); 2--increase of stroke volume and EF. The contractility indexes of left ventricle, however, showed different responses to the 2 substances: 1--with IP there was an increase of peak dp/dt and common peak isovolumetric pressure (CPIP 45 mmHg); 2--with IS there was no variation. The authors conclude that: 1--IP or similar drugs may be used during cardiac catheterization to evaluate the contractile reserve of the myocardium; 2--IS may be used in ambulatorial treatment of DM to improve ventricular function through a tendency to normalize intracardiac pressure-volume relation.

Adolescent↗
PubMed1984

The role of detail information in the recognition of complex pictorial stimuli.

The present research investigated the relation between detail encoding and the facilition of picture recognition which results from the presentation of a cue to give additional processing to one of several study stimuli. With college students of both sexes as Ss (86 in Experiment 1; 64 in Experiment 2), overall recognition performance was found to be positively related with the ability of Ss to specify a "remembered" detail from the test stimulus. However, the improvement in retention associated with the presentation of an attentional cue was not affected by whether Ss could identify a detail. Furthermore, in the second experiment the magnitude of the attentional cuing effect was not diminished even under conditions which should have limited the ability of Ss to process specific detail information: namely, the performance of a concurrent verbal task during the presentation of the pictorial study stimuli. The results indicate that identification and rehearsal of detail information does not underlie the facilitation of recognition performance obtained when Ss are instructed to give additional processing effort to a specific pictorial stimulus.

Attention↗