Civilian arterial trauma of the upper extremity. An 11 year experience in 267 patients.

Two hundred ninety-eight arterial injuries in 269 upper extremities were reviewed. Penetrating agents accounted for 250 injuries (93 percent) and blunt trauma for 19 (7 percent). Fifty-nine axillary, 126 brachial, 65 radial, and 48 ulnar arteries were damaged.

Mortality and renal salvage after renovascular trauma. A review of 94 patients treated in a 20 year period.

Ninety-four patients with 96 renovascular injuries underwent operations over a 20 year period. Forty-nine patients had renal artery injury, 45 had isolated venous injury, and 33 had both vessels injured. Arterial revascularization succeeded in four patients, failed in five, and the results were not documented in three.

Arterial injuries below the knee: fifty-one patients with 82 injuries.

Clinical features of tibial and peroneal artery injuries are characterized in a review of 51 patients with 82 injured arteries. Injuries were penetrating in 34 (67%) patients and blunt in 17 (33%). Physical findings suggested arterial injuries in 42 (82%) patients, but nine had no signs of vascular trauma.

An iterative approach to region growing using associative memories.

The postulate is made that ``any computation which can be performed recursively can be performed easily and efficiently by iteration coupled with association.'' The ``easily and efficiently'' part of that postulate is nontrivial to prove, and is shown by examples in this paper. The use of association leads directly to potential implementation by content-addressable memories.

Diffusion in the vicinity of standard-design nuclear power plants--II. Wind-tunnel evaluation of building-wake characteristics.

Laboratory experiments were conducted to simulate radiopollutant effluents released to the atmosphere from two standard-design nuclear power plants. The main objective of the study was to compare the dispersion in the wakes of the plants with that in a simulated atmospheric boundary layer. Dispersion functions are determined that describe the spread of the effluent plume in the wake of each plant.

Diffusion in the vicinity of standard-design nuclear power plants--I. Wind-tunnel evaluation of diffusive characteristics of a simulated suburban neutral atmospheric boundary layer.

A large meteorological wind tunnel was used to simulate a suburban atmospheric boundary layer. The model-prototype scale was 1:300 and the roughness length was approximately 1.0 m full scale.

Penetrating injuries of the Iliac vessels. Early recognition and management.

Exsanguination due to hemorrhage caused death in 18 percent of patients with penetrating iliac vessel trauma. Improved survival demands earlier recognition and expedient operative control. One hundred fourteen patients were treated at a single institution during an 11 year period.

Sequential changes in bone density before and after parathyroidectomy in primary hyperparathyroidism.

Bone density (bone mineral content/bone width) was determined by iodine-125 (125I)-photon absorptiometry in the distal third of the radius before and after successful parathyroidectomy in 37 patients with primary hyperparathyroidism. Bone density progressively declined during the two years immediately preceding surgery. It rose by 6.

Vascular injuries near the knee: an updated series and overview of the problem.

Injury of the popliteal artery results in amputation more often than any other arterial injury. Adjacent injuries, small vessel thrombosis, and muscle necrosis are the major deterrents to limb salvage. This report updates a previously published series, expanded to include 110 injuries treated during a 14-year period.

Early identification of patients prone to develop adult respiratory distress syndrome.

Fifty-nine intubated nonhypoxic patients with clinical criteria associated with adult respiratory distress syndrome were studied. Clinical measurement were sought to identify patients before severe hypoxemia occurred. Etiologic factors, chest roentgenography, effective static compliance, intrapulmonary shunt and arterial blood gases on 40 and 100 percent inspired oxygen were analyzed.

A lack of unique pathophysiologic background for nephrolithiasis of primary hyperparathyroidism.

The metabolic picture of 32 patients with surgically proven primary hyperparathyroidism presenting with renal stones was compared with that of 37 patients without stones. Between stone-forming and nonstone-forming groups, there was no significant difference in serum 1,25-dihydroxyvitamin D [6.82 +/- 2.

Cimetidine vs antacid in prophylaxis for stress ulceration.

Seven-seven critically ill patients were prospectively randomized into four groups to compare antacids and various doses of cimetidine in the neutralization of gastric acid for preventing complications of stress ulcers. Gastric pH was monitored hourly, basing the efficacy of neutralization on preselected pH values for each study group. Cimetidine provided adequate neutralization in 14 (23%) of 61 patients.

Complications and results of 160 Baker tube plications.

The basic indication for Baker tube plication is widespread enteric serosal injury. The prediction of subsequent small bowel obstruction remains difficult. Consequently, the benefits of Baker tube plication cannot be clearly defined.

Carotid artery injuries caused by blunt trauma.

Carotid artery injuries caused by blunt trauma often cause thrombosis and delayed neurologic deficits, and are associated with mortality rates of up to 40%. In this series of 17 patients with blunt trauma of the carotid, three had no symptoms, ten patients had limb paresis and four had severe neuroligic deficits. The wounds were identified by arteriography; repair was attempted in 15 patients, and successful in eight.

Publisher: professional or profiteer?

This article discusses the general economics of journal and monograph publishing. The costs related to acquisition, production, marketing, and distribution of journals and monographs are analyzed by considering "typical" cost elements borne by all scientific and medical publishers.

The surgical management of duodenal trauma. Precepts based on a review of 247 cases.

The lethal potential of duodenal trauma relates to the severity of the defect, associated injuries, and the adequacy and expedience of treatment. We studied 247 patients whose injuries were managed at a single institution during an 18-year period. Emphasis was placed on complications directly related to the duodenal wound and the selection of operative repair.

Finding the extrema of a region.

The computational difficulty of finding the extreme points (those two points furthest from each other) in a region of an image is examined. Various approaches are described, including computation of convex hulls, sophisticated search strategies, and a statistical method. Suitability of the various methods to particular applications is discussed.

Synthesis of choline and ethanolamine phospholipids with thiophosphoester bonds as substrates for phospholipase C.

Spectrophotometric assays of esterases are sensitive, rapid, and quite specific when thioester substrates are used. Glycerophospholipids with thiophosphoester bonds may be useful as substrates for phospholipase C (EC 3.1.

Ultrasonographic features of choroidal malignant melanomas.

In a 12-month period 26 eyes were enucleated after an ultrasonographic diagnosis was made of malignant melanoma of the choroid. Histologic features of the tumors were reviewed. The ultrasonographic diagnosis was correct in 100% (26/26) of enucleated eyes.