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Biomedical subjects

N A Halasz

Publications and source records attributed to N A Halasz.

At least 55 records · Page 3Linked to original sources
PubMed1981

Nonaneurysmal suppurative aortitis.

Two patients had nonaneurysmal suppurative aortitis. In one, the aortic ruptured and the patient died. The second patient had Salmonella sepsis and occlusion of the infrarenal aorta. He was treated with aortic resection and extra-anatomic bypass, but died 20 months later of an unrelated illness. Patients with Salmonella sepsis who are over 50 years of age or who are suspected of having aortic atherosclerosis should be evaluated carefully for aortitis since rupture or aneurysm formation is associated with a dismal prognosis.

Aged↗
PubMed1980

Studies of the ideal [H+] for perfusional preservation.

The neutral point of water, being a function of its dissociation constant, is temperature dependent. This is also true of protein-buffered solutions such as perfusates. In organ preservation these facts have been long ignored and, as a result, perfusions have been carried out in a relatively acidotic environment. These studies evaluated the effects of correcting the pH partially or completely for the level of hypothermia involved in perfusional preservation. The findings both in rabbits and dogs were that a pH of 7.4 (measured at 7 C) is dangerously close to the pH below which there is rapid deterioration of function. On the other hand, perfusate pHs up to 7.75 in dogs and 8.25 in rabbits were tolerated at no detriment. As a result, the recommendation is made to carry out hypothermic organ perfusion at a pH well above 7.4; 7.60 or 7.65 seems reasonable.

Animals↗
PubMed1979

Pharmacological protection of rabbit kidneys from normothermic ischemia.

This study investigated the influence of the administration of pharmacological agents on the recovery of rabbit kidneys from the effects of 1 hr of situ normothermic ischemia, utilizing acute and chronic models. The agents tested included the diuretics mannitol and furosemide, the vasoactive agents phenoxybenzamine, propranolol, and dopamine, and the membrane stabilizers chlorpromazine and methylprednisolone. A beneficial effect was detected only with the diuretic agents and propranolol when given prior to the ischemic insult.

Animals↗
PubMed1979

Gas exchange after pulmonary fat embolism in dogs.

Gas exchange following moderately severe experimental pulmonary fat embolism was studied in nine dogs. A new method designed to describe the distribution of ventilation-perfusion ratios in the lung was applied before and after intravenous injection of homologous neutral fat. The dose of fat (0.75 ml/kg) was low enough to produce a small but significant decrease in arterial PO2 (mean change of 10 mm Hg) in the first 15 minutes after the embolism but high enough to result in the death of two of the four dogs that were allowed to survive the initial postembolism period. Pulmonary artery pressure and pulmonary vascular resistance both rose significantly within 5 minutes of the fat injection and remained elevated for the 2 hour experimental period. Immediately after the embolism there was an increase in the percentage of the total ventilation going to areas of the lung with ventilation-perfusion ratios between 10 and 100, which usually appeared as a discrete mode in the ventilation distribution. This mismatching of ventilation and perfusion partially resolved within 2 hours after the embolism, as indicated by the gradual disappearance of this population of gas exchanging units with relatively decreased blood flow. At no time within 2 hours after the embolism was there a significant increase in shunt or in ventilation to totally unperfused lung. The gas exchange pattern in the two dogs that subsequently died was indistinguishable from that of the other seven in the immediate postembolism period.

Animals↗
PubMed1978

Transplant renal artery stenosis occurring in both recipients from a single donor.

Stenosis of the renal artery is increasingly being recognized as a cause of hypertension and renal failure after kidney transplantation. To our knowledge, this is the first report of an almost simultaneous occurrence of this complication in both recipients of kidneys from a single donor. In both cases, surgical correction led to improved renal function and amelioration of the hypertension.

Adult↗
PubMed1978

Acute pancreatitis following renal allotransplantation. A lethal complication.

Since first described by Starzl in 1964 (1), acute pancreatitis following renal homotransplantation has been the subject of sporadic reports and reviews (2-5). The generally reported incidence has been around 2%, with a mortality rate of 50-60%. A recent experience with such a patient caused us to retrospectively analyze our own series of renal transplant recipients. In an eight-year period, there were six patients who had documented pancreatitis out of a total 120 renal homograft recipients, an incidence of 5%. The mortality was distressingly high; five out of the six succumbed directly to this complication, a rate of 83%. The purpose of this paper is to review these six patients in detail, with special attention to the protean etiologies and manifestations of this lethal complication.

Acute Disease↗
PubMed1977

Wound infection and topical antibiotics: the surgeon's dilemma.

The topical use of antibiotics in surgical wounds is critically reviewed and analyzed. Thirteen experimental and 19 clinical reports are included in this review. Prospective and retrospective clinical studies have been separated. The analysis evaluated clean vs contaminated/dirty wounds, as well as the effects of various antibiotics and combinations. The conclusion reached on the basis of the experimental and clinical data is that the application of carefully selected topical antibiotics to surgical wounds, particularly those that represent a high risk for the development of wound infection, can be expected to diminish the incidence of this complication in a significant fashion.

Administration, Topical↗