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Biomedical subjects

N Johnson

Publications and source records attributed to N Johnson.

At least 325 records · Page 18Linked to original sources
PubMed1977

Carotid cavernous fistula in pregnancy.

A carotid-cavernous fistula in pregnancy is not rare. Increasing pain and worsening of the proptosis made prompt operative intervention necessary. The fact that other known cerebrovascular lesions lend themselves to surgical attack without undue risk during this time8--11 prompted us to proceed with surgery. There was no adverse effect on the pregnancy, other than premature delivery. Both the mother and child are doing well 4 years after surgery.

Adult↗
PubMed1977

Pleuroscopy and cautery control of intrathoracic hemorrhage with a flexible fiberoptic bronchoscope.

Intrathoracic hemorrhage from adhesions torn by a spontaneous pneumothorax is relatively uncommon. Continued hemorrhage from such adhesions after the evacuation of 1,500 ml of blood would usually require thoracotomy for control. Through a flexible fiberoptic bronchoscope, we confirmed the source of hemorrhage and cauterized the bleeding point. This case illustrates another application for pleuroscopic examination, further broadening the use of the flexible fiberoptic bronchoscope.

Adult↗
PubMed1977

Mixed bacterial meningitis: a complication of ventriculo- and lumboperitoneal shunts.

Infectious complications of ventriculo- and lumboperitoneal shunts in two patients are presented. Cerebrospinal fluid infection due to aerobic and anaerobic enteric flora was characteristic of each case. Both infections occurred several months after shunt surgery and were associated with colonic perforation by the distal limb of the peritoneal catheter. These cases emphasize this unusual hazard of peritoneal shunts and demonstrate methods for diagnosis and effective therapy.

Adult↗
PubMed1977

Changes in role perceptions by first-year dental students.

Dental education combines the learning of technical skills with the professional role of health care provider. The investigation compared first-year dental students perception of themselves, dental practitioners, dental school upper-class students, and patients. The study indicated that first-year students are more likely to identify with upper-class students than with dental practitioners. They also tended to see themselves as clearly different from dental patients. It is suggested that dental educators should recognize this fact in order to avoid the depersonalization of dental care delivery.

California↗
PubMed1976

Changes in intra-vascular complement and anti-treponemal antibody titres preceding the Jarisch-Herxheimer reaction in secondary syphilis.

Six patients with secondary syphilis and one control subject were observed over a period of up to 8 hr following the administration of either penicillin or erythromycin. Serial clinical observations were made and blood samples obtained for complement and serological analysis. The patients showed Jarisch-Herxheimer reactions (JHR) of varying intensity which were found to be preceded by and to parallel in degree certain changes in complement and syphilitic antibody titres. Falls in total haemolytic complement, in C4, C3, C6 and C7 and a marked drop in C1INH were observed. There was no change in total GBG/GGG or evidence of conversion of GBG to GGG. Associated falls occurred in the titres of the QFTA and the QTPHA antibodies but not of the QVDRL or QTPI antibodies. C3 conversion was found in the two patients that suffered severe reactions. Immune complexes were not detected and it is suggested that complement activation occurred in the extra-vascular body compartment. The significance of these changes in relation to other plasma enzyme systems and to the development of the full clinical picture of the JHR is discussed.

Antibodies, Bacterial↗
PubMed1975

The management of popliteal aneurysms.

Twenty-three patients with 34 popliteal aneurysms were treated between 1963 and 1974. Nearly half of the aneurysms were the site of thrombosis when they first presented, and of these nearly half required a major amputation. Surgical treatment of aneurysms in which the popliteal artery was patent was satisfactory; the only failure occurred when a Dacron graft became occluded after eight years. A small group of patients was observed for an average of one year, during which time the thrombus in one aneurysm embolized and one aneurysm became occluded, necessitating an amputation. The results of this series suggest that the prognosis for a limb with popliteal aneurysm depends on the patency of the popliteal artery at the time of the initial presentation, and lends support to the belief that popliteal arteries with aneurysms are best reconstructed before the onset of a serious complication.

Adult↗
PubMed1975

Ruptured iliac aneurysms.

Iliac aneurysms are uncommon as compared with aneurysms of the abdominal aorta. Rupture is the most serious complication of aneurysms of both vessels. Considerable attention has been focused on the management of ruptured abdomonal aortic aneurysms, but ruptured iliac aneurysms have received little notice. The problems in the management of ten ruptured iliac aneurysms, seen over the last five years, together with the rarity of other reports of this condition, have stimulated this review.

Aged↗