Biomedical subjects

R Klingman

Publications and source records attributed to R Klingman.

4 recordsLinked to original sources

PubMed1991

Cardiopulmonary bypass.

There has been a recent renewed interest in certain aspects of cardiopulmonary bypass employing extracorporeal circulation. Several areas have received special attention. Among these is the institution of extracorporeal circulation using a percutaneous technique for circulatory assistance during high-risk percutaneous transluminal coronary angioplasty. A national registry has been established to review and monitor results using this percutaneous technique. Several recent developments in the delivery of cardioplegia during ischemic arrest have stimulated investigative efforts. In particular, the delivery of cardioplegia in a retrograde manner through the coronary sinus has proved an effective and useful adjunct to myocardial protection during cardiopulmonary bypass with extracorporeal circulation. A newer investigative technique employing only warm cardioplegia delivered primarily through the retrograde coronary sinus route seems to offer some promise in providing optimal myocardial protection while minimizing hemorrhagic complications and other cold-induced myocardial injury. Because of concerns regarding blood transfusion-related communicable disease (eg, acquired immune deficiency syndrome and non-A, non-B hepatitis), there has been increasing research effort into postoperative hemorrhage related to cardiopulmonary bypass with extracorporeal circulation. Specifically, various drugs that may serve as hemostatic adjuncts have been investigated extensively. These drugs include aprotinin and desmopressin acetate. Likewise, several studies have evaluated other drugs (mainly aspirin) that have a negative influence on postoperative hemostasis. Additionally, there has been continued research interest in the activation of the inflammatory system during cardiopulmonary bypass.(ABSTRACT TRUNCATED AT 250 WORDS)

Aprotinin↗

PubMed1990

Basal cell burn carcinoma.

Postburn malignant degeneration into squamous cell carcinoma is unusual but well described. Much rarer is malignant degeneration of a burn into basal cell carcinoma. Recently a well-documented case was seen. The cause was postulated to be injury to the more superficial hair follicles and sweat glands. A brief report is given.

Aged↗

PubMed1988

Surgical treatment of the parathyroid gland in patients with end-stage renal disease.

During the period from December 1984 to December 1986, ten patients with end-stage renal disease were evaluated with hyperparathyroidism refractory to medical management. Symptoms were bone pain in eight patients and pruritus and constipation in two. Two patients with bone pain also had impaired mentation. Biochemical preoperative assessment revealed calcium levels between 8.7 and 11.2 milligrams per deciliter, with a median of 10.5 milligrams per deciliter. Phosphate levels were normal in all but three patients, and the phosphate-calcium product was greater than 80 in two. Parathyroid hormone levels assessed with the radioimmunoassay method were elevated in all patients, and results of ultrasound of the neck, done in seven patients, revealed hyperplastic glands in six patients and normal glands in one patient. All patients underwent surgical exploration of the neck with removal of four parathyroid glands and immediate autotransplantation. No complications related to the operative procedure occurred. Postoperative calcium levels ranged between 6.5 and 9.5 milligrams per deciliter on the first postoperative day and normalized by the sixth day. Four patients experienced symptomatic hypocalcemia requiring intravenous calcium supplementation for one to six days postoperatively. The mean hospital stay was four days (three to seven days). All patients had histologically confirmed four gland parathyroid hyperplasia. Marked improvement of symptoms was accomplished in all patients after a period of three to 30 days. One patient required revision of the forearm parathyroid transplant after four months. One patient required calcium supplementation taken orally, two patients required 1,25-Dihydroxyvitamin D3 and five required treatment with both. Two patients did not require any further medical treatment, and no patient had recurrent symptoms after a mean follow-up period of eight months. We recommend total parathyroidectomy with autotransplantation in patients with end-stage renal disease as a safe and effective procedure for symptomatic refractory hyperparathyroidism. Symptom relief can be accomplished in the vast majority of patients.

Adolescent↗

PubMedDate not supplied

Transesophageal echocardiography in the surgical management of renal cell carcinoma with intracardiac extension.

Renal cell carcinomas may extend into the vena cava and the tumor thrombus occasionally involves the right atrium. The operative approach depends upon precise preoperative and intraoperative staging and thrombus localization. We report a case of renal cell carcinoma with complete inferior vena caval and hepatic vein occlusion with tumor extension into the right atrium. Preoperatively, transesophageal echocardiography provided superior images of the tumor and its extension, and intraoperatively allowed continuous monitoring of cardiac function and the removal of tumor from the atrium and inferior vena cava. Its use obviated the need for more costly and invasive preoperative and intraoperative procedures.

Carcinoma, Renal Cell↗