Search PubMed⌕ Search

Biomedical subjects

M T Freedman

Publications and source records attributed to M T Freedman.

26 records · Page 2Linked to original sources
PubMed1985

Policies and attitudes toward the pregnant radiology resident.

To evaluate attitudes and policies toward pregnant radiology residents, a questionnaire was sent to the chiefs of radiology residency programs across the country. A return rate of 76.4% and a response rate of 75.4% were achieved. A large majority of the respondents indicated that schedule changes would be made to avoid excessive exposure of a pregnant resident to radiation. The accommodations they suggest are reviewed, and suggestions are made that would help alleviate some of the stress and conflicts that invariably arise when a resident becomes pregnant.

Attitude↗
PubMed1984

Immediate closed antegrade Ender nailing of femoral fractures in polytrauma patients.

Fifty-four trauma patients with 61 femoral fractures stabilized within the first 24 hours of admission by closed antegrade Ender nailing were included in this study. This technique involves the insertion of Ender nails from a portal at the proximal end of the femur through the piriformis fossa. The curved distal ends of the nails were distributed throughout the distal femur to achieve greater purchase in the enlarged medullary canal of the distal fragment. This technique was used in one proximal, 20 midshaft, 37 distal, and three segmental fractures. There were 51 closed fractures, eight Grade I open, and two Grade II open fractures. The average age of the patient was 26 years, and the majority had polytrauma. The operative procedure was well tolerated by this group of patients. Pulmonary care was improved by avoidance of traction and enhanced capability for mobilization. Forty-two patients with 49 femoral fractures were available for complete follow-up. Forty-five fractures healed with the average time to appearance of bridging callus being 33 days, and average time to full union remodeled callus being 5.9 months. There were four nonunions, one delayed union, and eight malunions. There were nail protrusions in 22 cases (19 proximal and three distal). Fourteen patients required a second operation for reimpaction of the protruding nails or premature nail removal. These results were inferior to those obtained with the use of the retrograde Ender nailing technique or the Kuntscher nail. This technique should be used only if other techniques are unavailable or inappropriate, and only for stable, noncomminuted fractures.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1980

Ten section approach to computed tomography of the pelvis.

This report describes a simplified anatomic approach to computerized tomography of the pelvis. This approach is based on the recognition of certain key features or landmarks in ten characteristic sections. These sections can be obtained routinely by using the L5 vertebral body as an initial reference point and then scanning sequentially at two centimeter intervals. These ten sections offer a relatively complete overview of the pelvis in most patients, and can serve, therefore, as a protocol for rapid screening.

Humans↗
PubMed1978

Crossed renal ectopia.

Crossed renal ectopia is an unusual congenital anomaly, probably produced by abnormal development of the ureteral bud. The deformity itself produces no symptoms and the clinical presentation generally is for obstruction and infection. In our series the adult patients presented most commonly with urinary tract infections, while the pediatric patients presented most often with multiple congenital anomalies, especially of the skeletal system.

Abnormalities, Multiple↗
PubMed1977

Beneficial effect of propranolol in a histologically appropriate model of postischemic acute renal failure.

Acute renal failure caused in the rabbit by clamping one renal pedicle for 1 hour and removing the opposite kidney produced a histologic picture very similar to that observed in "hypotensive" acute renal failure in man. Intravenous infusion of propranolol, a drug which prevents renin release, at 1 mg/kg for 70 minutes beginning at time of pedicle clamping resulted in significantly lower serum creatinine in this model (2.8 +/- 0.2 mg% at 48 hours with propranolol versus 5.2 +/- 0.8 mg% without). Renin stimulation by dehydration or feeding a low-salt diet enhanced the difference between treated and untreated groups (2.6 +/- 0.4 mg% with propranolol versus 6.2 +/- 1.8 mg% without, after dehydration; 3.5 +/- 1.0 mg% with propranolol versus 7.6 +/- 1.4 mg% without, after low-salt diet).Suppression of renin production by saline feeding eliminated propranolol's beneficial effect (5.6 +/- 0.9 mg% with propranolol versus 4.0 +/- 0.6 mg% without). In rabbits with a normal food and water intake, renal denervation using phenol also eliminated propranolol's effect (creatinine 8.6 +/- 1.4 mg% with propranolol versus 8.6 +/- 1.8 mg% without). In rabbits with intact kidneys, flow probe recording of renal blood flow showed a significantly higher blood flow immediately after unclamping in the propranolol-treated animals, and renal angiograms showed less vasoconstriction in this group after unclamping. In this model of acute renal failure, renal vasoconstriction plays an important role following the initial ischemic insult. Propranolol lessens the severity of this vasoconstriction and the resulting acute renal failure. Its probable action is interference with neurogenically stimulated renin release.

Acute Kidney Injury↗