Biomedical subjects
Publications and source records attributed to K Maar.
The appearance of a unilateral Horner's syndrome after an anesthetic in the lateral recumbent position is reported. It was caused by a damage to the sympathetic nerve at the level of Th 1 probably due to the extreme lateral flexion of the cervical vertebral spine. The importance of correct positioning of the head during anesthesia is stressed.
A retrospective study compares the effectiveness of postoperative epidural analgesia with conventional analgetic medication in cases of retroperitoneal lymph node dissection. Epidural analgesia is noted for its reduced need for additional medication and for its lower incidence of complications.
We have used the method of internal splinting of the ureter (endoprothesis) for the past ten years. Because we observed partial obstruction of the lumen by incrustations and/or fibrin coagula in cases in which the splints had been in place for long periods, we conducted in vitro experiments into the problem. Under constant and variable conditions, urine was perfused through plastic tubes of different materials. Organic and inorganic urine substances and urine pH were analyzed. The materials used were examined with special scanning electron microscopic techniques, and various depositions, especially in comparisons of in vivo and in vitro conditions, were found.
The effect of antiaggregating agents - acetylsalicyclic acid (ASA) and dipyridamol - on the rejection of allotransplanted canine kidneys in presensitized animals were studied. Blood flow dropped more markedly in the control group than in the group treated with ASA and dipyridamol. 24 hours after transplantation the blood flow in this group was significantly higher than in the control group (p 2,5 %) and in the third group treated with dipyridamol alone. The cellular rejection started earlier and was more pronounced in the control group. Only in this group vascular rejection and microthrombi were demonstrated. Urine output ceased 24 to 60 hours after transplantation. The immunosuppressive, antiphlogistic and platelet antiaggregating effect of the combined ASA and dipyridamol therapy is thought to be responsible for the better results in this group. In this experimental model the combined treatment of ASA and dipyridamol results in a later onset of cellular rejection, in better blood-flow of the kidney and later onset of anuria.
A report is presented on experience with 118 pyeloplasties using indwelling and transrenal splints. Detailed analysis of infections with both splint modifications has confirmed that better long-term results are achieved with internal drainage, due to the absence of potential contamination between splint and renal parenchyma which exists with external drainage.
The horseshoe kidney is a not so rare fusion anomaly of the urinary tract system. Clinical and genetic aspects of this phenomenon are shown in a case of familiar occurrence. Genetic consultation of the family must consider various inheritable possibilities and sources of this disease. The difficulty of an exact genealogical tree analysis is pointed out.
A malignant angiolipoleiomyoma and two benign angiomyolipomas are analyzed. Angiography and pathohistology are opposed. The renovasographic signs of these tumors are not specific for hamartomas and similar to those of hypernephroid carcinoma.
In 508 patients with tumours of the kidney, 14 rare neoplasms has been found. These are analyzed with regard to diagnosis, therapy, and prognosis.
A total of 112 cases of pyeloplasty were analyzed and the advantages of inner pyelovesical splinting as opposed to external drainage are outlined. Long-term results especially favor the former procedure. Scanning electron microscopic studies were done on the splinting material.
An analysis of urinary infection in pyeloplasties with the inner splinting method as opposed to external drainage was done. Five main bacterial groups were found. Based on the author's studies there are better results with the "endoprothesis". Preferring this modification, the question of the then existing reflux is discussed.
Recurrent macrohematuria and massive mucous flow from the urethra have been observed in a 81-year-old woman. Cystoscopy reveals a tumor of about pea-size in the apex of the bladder, which is histologically classified as an urachal adenoma. Clinical aspects and pathogenesis are discussed.