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Biomedical subjects

A J Gerlock

Publications and source records attributed to A J Gerlock.

At least 37 records · Page 2Linked to original sources
PubMed1982

An examination of the physical characteristics leading to angioplasty balloon rupture.

Six polyvinyl chloride and six polyethylene angioplasty balloons were inflated six times each under laboratory conditions. Outside diameter of the balloons was measured on initial and final inflations; volume was measured by water displacement at each inflation. In addition, three balloons in either group were constricted with a silk suture around the midportion. Balloons were then intentionally ruptured and the rupture site recorded. The diameters of the polyvinyl chloride balloons increased over six inflations, while they remained relatively constant for the polyethylene balloons. Rupture sites were in the area of the balloon that had the greatest outside diameter, and the tears were longitudinal.

Angioplasty, Balloon↗
PubMed1982

Partial splenic embolization for hypersplenism in renal transplantation.

Immunosuppressive therapy is necessary in the treatment and prevention of rejection in renal transplant recipients. Unfortunately, these patients may become intolerant to this therapy when it is complicated by hypersplenism with leukopenia and/or thrombocytopenia. The therapy must then be either decreased or stopped, thus preventing adequate treatment or prevention or rejection. Splenectomy has been used to treat the hypersplenism to break this cycle. It requires operative intervention with general anesthesia and prolonged hospitalization, and has been associated with fulminant bacterial septicemia. For these reasons, partial splenic embolization was offered to our patients as an alternative to splenectomy in the treatment of their immunosuppressive therapy intolerance due to hypersplenism. Six patients with acute rejection episodes and one patient on dialysis awaiting transplantation underwent partial splenic embolization. It corrected the hypersplenism in each case without significant complications allowing control of the rejection episode with adequate immunosuppressive therapy in six patients. Strict aseptic technique, pain control, and antibiotic prophylaxis are advised to prevent the complications of splenic abscess, rupture, or septicemia when this technique is used.

Adolescent↗
PubMed1981

Radionuclide evaluation of renal artery dilatation.

Radionuclide studies were sued in three patients to evaluate renal perfusion and function within 24 hours following transluminal dilatation. In one patient, technetium-99 m pertechnetate showed good renal perfusion one and 12 hours after a post-dilatation arteriogram had shown a renal artery intimal defect. Improved clearance of iodine-131 ortho-iodohippurate from the blood demonstrated an increase in renal function 18 hours following dilatation of a stenosis at a renal allograft anastomosis in the second patient, while technetium-99 m-labeled DTPA showed an improved total glomerular filtration rate 24-hours after dilatation of a saphenous vein bypass graft in the third patient. It was concluded that renal radionuclide studies are of benefit in evaluating patients in the immediate post-dilatation period.

Adult↗
PubMed1981

Infarction after embolization of the ileocolic artery.

Treatment of colonic hemorrhage by therapeutic embolization of the involved artery may, rarely, result in bowel infarction. In one patient with angiodysplasia, bowel infarction resulted from a therapeutic embolization of the ileocolic artery, because of the arterial anatomy of the cecum, occlusion of the cecal branches can result in devascularization of the cecum and appendix, even if the colic and ileal branches are not occluded. Thus, the ileocolic artery may not be a good candidate for therapeutic embolization.

Cecum↗
PubMed1981

Progression of renal artery fibromuscular dysplasia in 42 patients as seen on angiography.

Forty-two hypertensive patients with fibromuscular dysplasia who had angiographic evidence of the development of new disease or of the progression of existing disease were studied. Renal arterial disease was classified as medial fibroplasia with aneurysms (12 patients), subadventitial fibroplasia (24 patients), or intimal fibroplasia (6 patients). Progression of the disease was shown in all 42 patients during the follow-up period (from 1 month to 11 years and 4 months). The results indicate that all forms of fibromuscular dysplasia are progressive and have variable rates of progression.

Adult↗
PubMed1981

A comparison of carbon-fiber and aluminum front plates in rapid film changers.

The radiation transmission characteristics of 2-mm-thick aluminum front plates and 2-mm-thick carbon-fiber-reinforced plastic front plates for rapid film changers were compared. While the carbon-fiber plates were found to be intrinsically more radiolucent than the aluminum plates, the decrease in patient exposure with the carbon-fiber plates was only approximately 25%. No measurable differences in image quality were observed in carefully controlled experiments on the two types of front plates.

Aluminum↗
PubMed1981

Conjugated sodium tyropanoate (Bilopaque) in the bowel: significance of its presence or absence after first-dose oral cholecystography.

Oral cholecystography following the ingestion of 4.5 g of sodium tyropanoate (Bilopaque) was performed in 1,053 patients. The radiographs of 89 patients in whom the gallbladder was either faintly visualized or nonvisualized were reviewed for the presence of conjugated contrast material in the bowel. All 89 of these patients underwent second-dose cholecystography. Oral cholecystography was found to be 100% accurate in the diagnosis of gallbladder disease when conjugated contrast media was found in the bowel in the presence of a faintly visualized or nonvisualized gallbladder. When this combination of findings is seen on the first-dose examination, a second-dose examination is unnecessary. When no conjugated contrast material is seen in the bowel after a first dose, a second dose is helpful only in those patients with normal biochemical liver function tests.

Adolescent↗
PubMed1980

The pill bottle desiccant. A cause of partial gastrointestinal obstruction.

Two cases of partial upper gastrointestinal obstruction were found to be due to a pill bottle desiccant. In both patients, an organic stricture was present. The cylindrical nonsoluble container of the desiccant had a very characteristic radiological appearance. It is seen as a filling defect, with straight borders and square angles.

Accidents, Home↗
PubMed1980

Cervical spine trauma: a cause of vertebral artery injury.

Blunt injury to the neck can cause hemorrhage and pseudoaneurysm formation. A 76-year-old patient with severe blunt injury to the anterior neck was found to have entrapment of the left vertebral artery at C2-C3. Arch aortography 3 weeks postinjury revealed a large aneurysm at the injury site. The mass was surgically reduced, followed by ligation of the artery 9 days later, which resulted in prompt elimination of the mass and its accompanying bruit. Rapid recognition of this injury depends on early carotid and vertebral artery angiography.

Aged↗
PubMed1980

Acid corrosive esophagitis: radiographic findings.

Thirty-nine esophagograms of 24 patients after ingestion of muriatic acid (27% HCI) in suicide attempts were reviewed. All esophagograms were obtained in the acute, subacute, and chronic phases. In the acute and subacute phases, the radiographic findings consisted of mucosal edema, submucosal edema or hemorrhage, ulcerations, sloughing of the mucosa, atony, and dilatation. Strictures of the esophagus were present in the chronic phase. These radiographic findings were not different from those found in alkaline corrosive esophagitis. The severity of the corrosive esophagitis is considered related to the concentration, amount, viscosity, and duration of contact between the caustic agent and the esophageal mucosa.

Acute Disease↗
PubMed1980

Diagnosis of obstructive jaundice with nondilated bile ducts.

Obstructive jaundice with nondilated bile ducts was identified by percutaneous transhepatic cholangiography (PTC) in nine of 29 jaundiced patients in whom the etiology of the jaundice was not clearly established by clinical or laboratory means and no dilated ducts were seen at somography or computed tomography (CT). PTC was helpful in these none patients by: (1) differentiating obstructive from nonobstructive jaundice, (2) localizing the site and etiology of the obstructing lesion, and (3) determining operability.

Adenocarcinoma↗
PubMed1980

Traumatic aortic aneurysm: validity of esophageal tube displacement sign.

Displacement of the nasogastric tube to the right as a new sign in the diagnosis of an acute traumatic rupture of the thoracic aorta was reevaluated by statistical analysis in 28 patients (seven patients with a traumatic aortic aneurysm and 21 patients with normal aortas). This new sign was compared with the commonly used chest radiographic findings in 46 patients (eight patients with a traumatic aortic aneurysm and 38 with normal aortas). This study showed that when both the trachea and the nasogastric tube were shifted to the right, as seen on the chest radiograph, the patient had a 96% probability of having an acute rupture of the thoracic aorta.

Adolescent↗
PubMed1980

Pseudopathologic hip fracture: anatomic explanation.

Fracture of the hip may result in external rotation of the femoral diaphysis. When this occurs the proximal diaphysis may appear homogeneously dense, particularly in elderly woman. Computed tomography shows that the misleading appearance is due to variations in cortical thickness anteroposteriorly and mediolaterally. This finding is important as this appearance of the femur must be distinguished from a pathologic fracture.

Aged↗