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Biomedical subjects

A M Awwad

Publications and source records attributed to A M Awwad.

7 recordsLinked to original sources
PubMed1996

Hantaan virus infection among human and rat populations in Alexandria.

Hantaan virus has recently been identified as the cause of the rodent borne viral zoonosis collectively termed Hantavirus disease (HVD). Although the disease is mainly endemic in two main areas, clinical forms as well as positive antibody testing from healthy persons throughout the world have been reported denoting a worldwide presence. Rattus species are almost universally implicated as hantavirus reservoirs. Screening for hantavirus antibodies was done on 637 samples of human sera and 861 rodent sera trapped from 26 locations throughout the city of Alexandria, Egypt. ELISA assays were performed and 12.2% of humans were found seropositive with no effect of age, duration of work at sea or residence on seropositivity. 12.8% of rodents were seropositive with Rattus norvegicus showing the highest prevalence and with no influence of sex, age or habitat. A significant association was found between the east district and seropositivity to Hantaan in rodents.

Adolescent↗
PubMed1990

Tissue oxygen tension measurement for monitoring musculocutaneous and cutaneous flaps.

In pigs, latissimus dorsi musculocutaneous island flaps and buttock skin island flaps were raised. Subcutaneous (PscO2) and intramuscular oxygen tension (PimO2) were measured using a non-heated needle electrode before, during and after repeated occlusion of the supplying artery or the draining vein. During arterial and venous occlusion, the tissue oxygen tension in the musculocutaneous flap dropped rapidly. A plateau was reached after 15 min. After arterial occlusion the mean value was 20 mmHg (SEM = +/- 5 mmHg, N = 6) in the subcutis and 16 mmHg in the muscle (SEM = +/- 4 mmHg, N = 10). After venous occlusion the mean value was 11 mmHg (SEM = +/- 3 mmHg, N = 6) in the subcutis. In the skin flap the drop of PscO2 was slower, and after 30 min of arterial occlusion the mean value was 29 mmHg (SEM = +/- 9 mmHg, N = 6). This study has shown that tissue oxygen tension measurement can be used as a sensitive indicator of acute impairment of the supplying vessels in island flaps. The method seems to have potential for monitoring free tissue transfers. A comparable decrease in PscO2 was found for arterial and venous impairment.

Animals↗
PubMed1984

A training card for microsurgery.

A training card for microsurgery is described which could be useful for beginners. The card is light in weight, inexpensive to produce, easy to use, and can be preserved as a record of progress.

Education, Medical, Continuing↗
PubMed1983

The effect of temperature on blood flow in island and free skin flaps: an experimental study.

Skin blood flow is especially susceptible to temperature change, as the skin has an important role in body thermoregulation. The effect of temperature on blood flow in an experimental skin flap model in the dog has been measured using an electromagnetic flowmeter. the flap blood flow varied directly with temperature. In the range 22 degrees C-38 degrees C, this relationship was linear, the increase in the flap blood flow being 3.41% per degree Celsius. However, outside this temperature range the change was much greater.

Animals↗