Biomedical subjects

J R Damron

Publications and source records attributed to J R Damron.

4 recordsLinked to original sources

PubMed1978

Isotope loopography, a new test: comparison with standard loopography and its relationship to renal function in patients with ileal conduit urinary diversion.

Reflux associated with the classic ileal conduit has been implicated as possibly contributing to long-term renal deterioration. When demonstrated on a standard loopogram reflux occurs under highly non-physiologic conditions. A new method of radioisotope loopography performed under physiologic conditions was devised and compared to the standard loopogram. The standard loopogram is more of an indicator for the capacity for reflux. The isotope loopogram is a more specific indicator for reflux that is potentially detrimental to renal function. Approximately 50 per cent of ureteroileal anastomoses that permit reflux with conventional loopography do not do so under the physiologic conditions of the isotope loopogram.

Adolescent↗

PubMed1978

Results and patterns of perioperative myocardial infarction.

Myocardial injury during a variety of cardiac surgical operations was determined in 57 patients by serial electrocardiograms (ECG's), serial determinations of serum creatine phosphokinase (CPK), and perioperative and postoperative technetium-99m stannous pyrophosphate (PYP) scans. ECG evidence of injury developed in four patients, whereas positive localized injury by PYP scan developed in ten. Twenty-one patients had elevated CPK enzymes postoperatively. The localization of injury by PYP scan correlated with ECG evidence of infarction in only one of four patients. Localized left ventricular injury by PYP scan without new Q waves on the ECG was common (5/12) in patients undergoing aortic valve replacement with perfusion of the coronary arteries. The injury in patients with congenital heart disease occurred at sites of ventricular incision or suggested possible air embolization of the coronary arteries. Perioperative infarction is frequently segmental and nontransmural and occurs in patients with coronary, valvular, and congenital heart disease.

Adult↗

PubMed1976

Detection of upper abdominal abscesses by radionuclide imaging.

An improved means of detecting upper abdominal abscesses using the dual radionuclide subtraction technique was applied to 51 patients. 67Gallium citrate was used in the localization of the lesion and 99Tc-labeled human albumin microspheres and 99Tc sulfur colloid were used for subtracting out the interfering background from normal organ concentrations. The procedure provided the parameter capabilities for localization of the abscesses as well as information on their shape and size. Compared to nonsubtraction Ga procedures, 53% more abscesses were diagnosed using the subtraction technique.

Abdomen↗

PubMed1975

Rectal diverticula.

Eight cases of rectal diverticula are discussed with reference to the etiological, clinical and radiological findings. Males predominated 3:1 and the average number of diverticula in each patient was 2. Diverticulosis of the remaining colon, especially the sigmoid segment, always accompanied rectal diverticula. The average diameter of rectal diverticula was larger than that of the colonic: 2.5 cm vs. 0.5-1.0 cm. Rectal diverticula may be confused with a carcinoma at endoscopy. Surgical treatment becomes necessary if the diverticulum progresses to abscess formation and perforation.

Aged↗