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Biomedical subjects

D B Wyatt

Publications and source records attributed to D B Wyatt.

4 recordsLinked to original sources
PubMed1993

Comparison of rapid versus slow tissue expansion on skin-flap viability.

The effect of rapid versus slow tissue expansion on random-pattern skin-flap survival lengths was evaluated in two groups of pigs. Each group (group 1--slow; group 2--rapid) was further evaluated for the effect that delay (A), delay plus expansion (B), expansion only (C), and acute flap elevation (D) had on flap length viability. Intergroup and intragroup comparisons were made. In the slowly expanded group, significantly greater flap length viabilities were demonstrated in the slow expansion flaps as compared with the delay plus expander flaps and the delayed flaps, respectively. In the rapidly expanded group, the flap length viabilities of flaps C, B, and A were statistically equal. However, the flap length viability of the rapidly expanded flaps was statistically equal to that of the slowly expanded flaps (C1 = C2). The effect tissue expansion has on improving flap length viability as compared with the delay phenomenon may be related to the combination of a delay effect plus increased nutrient flow density that slow expansion produces. This combined metabolic enhancement is preserved with rapid tissue expansion.

Animals↗
PubMed1984

Actinic granuloma of the conjunctiva.

The key histologic feature of pingueculas is the presence of actinic elastosis of the conjunctival connective-tissue fibers. We describe a patient who had a pinguecula that, on pathologic examination, exhibited a prominent foreign-body giant-cell reaction in association with the elastotic fibers. The term actinic granuloma has been coined recently to designate a similar reaction in sun-damaged skin. Because the nature of the inflammatory reaction may be misinterpreted on pathologic examination as indicating the presence of microorganisms or a foreign body, both the clinician and the pathologist should be aware of this peculiar inflammatory response, which has been described on two previous occasions in patients with pingueculas.

Adult↗
PubMedDate not supplied

Splenic rupture and infectious mononucleosis.

Infectious mononucleosis is an acute viral illness associated with a high incidence of splenomegaly, although the incidence of splenic rupture is low. When rupture occurs, the mortality has been significant, presumably, because a history of trauma is not present. The spleen may be vulnerable to injury due to the histopathologic changes that occur as a result of this illness. Essentially all patients with spontaneous rupture related to infectious mononucleosis have epigastric or upper abdominal pain. The diagnosis of splenic rupture may be confirmed in a variety of ways. In those patients who are hemodynamically stable, CT scan, ultrasound, or radionuclide scan may aid in establishing the diagnosis. Selective splenic angiography is very accurate but has been largely abandoned because of the invasive nature of the study. Peritoneal lavage is efficacious in establishing the diagnosis in hemodynamically unstable patients. The treatment of choice, at this time, is splenectomy. Current interest in splenic salvage has resulted in reports of nonoperative therapy in stable patients and splenorrhaphy in one instance. Due to the extent of the histologic changes in the spleen, caution is urged in electing the conservative approach to this clinical situation.

Adult↗