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Biomedical subjects

J Noble

Publications and source records attributed to J Noble.

At least 145 records · Page 8Linked to original sources
PubMed1985

Dermal wound repair: role of collagen matrix implants and synthetic polymer dressings.

The effects of two different polymeric wound dressings and a new collagen matrix (CM) implant on the healing and scarring of full-thickness excision wounds were studied in swine. The synthetic polymers comprised an occlusive O2-impermeable hydrocolloid dressing (HCD) and an occlusive O2-permeable polyurethane film (PUF). The CM implant consisted of an acellular collagen sponge fabricated from purified bovine tendon type I collagen. Wounds were evaluated for granulation tissue--production capacity by measuring 14C proline incorporation into collagenase-sensitive protein. Epidermal resurfacing and wound contraction were measured by computerized morphometric image analysis of wounds made on a tattooed grid. In comparison with air-exposed wounds, the relative collagen synthetic capacity was greater in the granulation tissue of wounds treated with HCD, PUF, or CM with occlusion. Both HCD and PUF accelerated by 40% the epidermal resurfacing over the granulating wound bed. Wound contraction was significantly reduced by CM but was not altered by the occlusive dressings.

Animals↗
PubMed1985

Occupational hazards to hospital personnel.

Hospital personnel are subject to various occupational hazards. Awareness of these risks, compliance with basic preventive measures, and adequate resources for interventions are essential components of an occupational health program. Physical, chemical, and radiation hazards; important infectious risks; and psychosocial problems prevalent in hospital workers are reviewed. A rational approach to managing and preventing these problems is offered.

Accidents, Occupational↗
PubMed1985

Studies of tibial subchondral bone density and its significance.

We examined the relationships between the density of the subchondral bone of the proximal end of the tibia and the location and condition of the overlying articular cartilage and menisci. We took coronal sections of the tibial plateaus and of the overlying articular cartilage and menisci from human knee joints that were grossly free of osteoarthritis. The specimens were examined for the presence of cartilage fibrillation using the India-ink technique of Meachim. Bone density was determined using the Quantimet picture-point analyzer. Fibrillation of articular cartilage was observed only in the articular cartilage that was not covered by meniscus and lying mesial to it, which supports the concept that the meniscus confers a protective effect on the articular cartilage. The density of the bone underlying the meniscus was lower, and was inversely related to the thickness of the meniscus and directly related to the thickness of the articular cartilage. In four knees from which the menisci were absent, the bone density was increased at the periphery. We suggest that there is a trinitarian relationship between the meniscus, cartilage, and subchondral bone, in which structural changes in any one of the three causes secondary pathological adaptive changes in the other two.

Adult↗
PubMed1985

[Volume and regional contraction of the left ventricle studied with venous injection in subtraction angiography].

UNLABELLED: The end-diastolic and end-systolic volumes, the left ventricular ejection fraction, and segmental contraction of the left ventricle (5 areas) were determined at rest in 31 patients using two methods: conventional cineventriculography (as reference) and digital subtraction angiography by venous injection (the inferior vena cava). RESULTS: the volumes and ejection fraction obtained by digital subtraction angiography were reliable, though slightly less accurate than conventional ventriculography. Quantification of segmental contraction was satisfactory in the apical, anterolateral, and anteroinferior portions. It was less satisfactory in the posteroinferior portion with questionable reliability in the diaphragmatic portion. Qualitative dynamic assessment of contraction was satisfactory in most patients.

Angiography↗
PubMed1984

A comparison of two methods of bleeding rats: the venous plexus of the eye versus the vena sublingualis.

Of paramount importance to most toxicological studies in rats is the evaluation of hematological and clinical chemistry parameters. Currently, the principle bleeding method utilizes the venous plexus of the eye. This procedure has no detrimental effect on the general health of the animal and yields a sufficient quantity of blood, but has the potential disadvantage of damaging the eye. To avoid this disadvantage, a method was developed which is simple to perform, yields a sufficient quantity of blood and leaves the eye unimpaired. Samples are taken from the vena sublingualis. In order to compare the two methods, a study was initiated to determine the effect on body weight and food consumption as well as to compare hematological and serum chemistry parameters. The results showed that drawing blood from the vena sublingualis did not affect body weight or food consumption, and no significant differences were found in the hematological or serum chemistry values obtained by either method.

Animals↗
PubMed1984

Diabetes mellitus in the aetiology of Dupuytren's disease.

In controlled clinical studies of adult diabetics a 42% incidence of signs of Dupuytren's disease was found. The incidence was highest in the older patients with a longer history of diabetes, but was not related to the severity of the diabetes. The features of Dupuytren's disease in the diabetics has a distinctive pattern, being more severe in men than women and, compared with controls, having a radial shift towards the middle finger. The disease was mild and of benign prognosis, rarely needing operation. In a further study, 13% of patients with Dupuytren's disease were found to have a raised blood glucose level. The question is posed as to whether the biochemical disturbance causes the Dupuytren's disease or whether the pattern of inheritance predisposes to both Dupuytren's disease and diabetes.

Adolescent↗
PubMed1984

A technique for difficult arthrodesis of the knee.

Twenty knees, in which a total of 32 previous operations had been performed, were arthrodesed by the Charnley compression technique combined with intramedullary nailing. Patients with previous infection were excluded from the series, but three neuropathic knees were included. Bony union was evident after an average of six months in all but one patient who died three months after operation. One patient developed deep infection that resolved after removing the nail. The combined technique is simple and only limited bone resection is needed; it gives immediate stability and relief of pain with minimal morbidity.

Adult↗
PubMed1984

Dislocations of the lunate with and without fracture of the scaphoid.

A review of 61 patients with dislocation of the lunate (some with and some without fracture of the scaphoid) showed that the majority had satisfactory results at an average follow-up of three and a half years. Most patients with a simple dislocation had a good or satisfactory result; radiological instability was noted in a quarter of the wrists but was not often associated with symptoms. Two-thirds of the patients with an associated fracture of the scaphoid had a good or satisfactory result. Immediate percutaneous wire fixation of the reduced scaphoid, whether it is fractured or not, is the best way of maintaining normal anatomical relationship while the ligaments and fracture heal; this may further improve the prognosis. In most cases extreme dorsiflexion of the wrist appeared to be the mechanism of injury.

Adolescent↗
PubMed1984

[Angiographic study of the dynamics of the interventricular septum].

The interventricular septum was studied by biventricular angiography in 52 patients divided into 4 groups: the first group consisted of 14 normal subjects; the second of 10 patients with hypertension (9 cases) or aortic stenosis (1 case); the third, of 19 patients with echocardiographic asymmetric septal hypertrophy, and the fourth, of 9 cases of cardiomyopathy with dilatation. The following parameters were measured: septal thickness at 4 different points and mean septal thickness, the height (long axis) and surface of the septum in diastole and systole. The percentage variation was calculated. There were no significant differences between Group I and II; there was a significant difference (p less than 0,01) in the variations of septal thickness of the upper segments between Group I and III. This difference remained significant (p less than 0,05) for the variations of mean thickness between Group I (-38%) and Group III (-18%). There was also a significant difference (p less than 0,05) in the variation of height between Group I (23%) and Group IV (9%). None of the variations of septal surface reached the threshold of statistical significance between the four groups. Biventricular angiography can therefore demonstrate certain abnormalities of septal motion. In asymmetric septal hypertrophy, the variations in thickness are significantly less pronounced than in normal subjects but the motion in the longitudinal axis does not differ significantly. In cardiomyopathy with dilatation, however, the variation in septal height is the most affected parameter.

Adolescent↗
PubMed1984

Secondary malignant synovitis: report of three cases and review of the literature.

Metastatic malignant deposits in joints are rare and only 16 cases have been described. The details of three further cases are presented, a girl with Hodgkin's lymphoma in a sternoclavicular joint, an elderly lady with carcinoma of the ascending colon and knee metastases and a middle-aged man, also with knee deposits, from an adenocarcinoma of lung. The clinical features together with details of synovial fluid cytology of all 19 cases are analysed.

Adenocarcinoma↗
PubMed1984

The incidence of Dupuytren's disease in patients with rheumatoid arthritis.

Some conditions commonly associated with Dupuytren's disease are well-known. No attention has been paid to conditions with a significantly low incidence of Dupuytren's. A large number of patients with rheumatoid arthritis were studied, and were found to have a statistically significantly lower incidence of Dupuytren's disease, than was observed by the same clinicians in age, sex, matched controlled patients.

Adult↗