Biomedical subjects

R Bumsted

Publications and source records attributed to R Bumsted.

3 recordsLinked to original sources

PubMed1993

Orbital complications in functional endoscopic sinus surgery.

Endoscopic sinus surgery can result in both minor and major complications. Among these, orbital complications--including retroorbital hematoma--are among the most feared. Injuries can be direct or indirect from pulling on diseased structures. A retrospective chart review of 616 endoscopic sinus procedures revealed eight orbital complications in seven patients. These included two medial rectus injuries, five orbital hemorrhages, and one nasolacrimal duct injury. Predisposing factors may include hypertension, lamina papyracia dehiscences, extensive polypoid disease, previous surgery, inability to visualize the maxillary ostia, violent coughing or sneezing, and chronic steroid use. Suggested management in the literature includes lateral canthotomy, steroids, and mannitol with ophthalmologic consultation. Opening of the wound by means of an external ethmoidectomy incision has also been suggested. We suggest that adding orbital decompression by means of multiple incisions into the periorbita should be added for fully effective relief. A "management" tree of decision parameters relevant to orbital complications is presented.

Adolescent↗

PubMed1987

Ultrastructural observations on vasomotor rhinitis.

The ultrastructure of the respiratory nasal mucosa of patients suffering from vasomotor rhinitis was studied and compared with the reported ultrastructural findings in cases of chronic perennial allergic rhinitis. The principal ultrastructural differences were the absence of interendothelial gap junctions, the scarcity of eosinophils and plasma cells, and the absence of immunologically stimulated or degranulated mast cells in vasomotor rhinitis. These differences were discussed in the light of the known pathophysiologic facts.

Biopsy↗

PubMed1982

Changes in quantitative norepinephrine levels in delayed pig flank flaps.

A quantitative norepinephrine assay was used to follow tissue norepinephrine concentrations serially in bipedicle delayed pig flank flaps. In contrast to a previous study by Palmer, norepinephrine concentration decreased significantly after 24 hr, but then gradually returned to normal at 10 days. This suggests that the pig flank flap maintains much of its adrenergic innervation following bipedicle delay. It appears unlikely that adrenergic denervation explains the delay phenomenon in this model. The combined results of this study and others suggest that the degree of adrenergic denervation of a flap is determined by the anatomic layout of the flap with respect to the underlying cutaneous adrenergic neural anatomy. This experiment suggests that the effectiveness of adrenergic blocking agents in improving flap survival is dependent on the degree of adrenergic denervation of the flap.

Animals↗