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Biomedical subjects

N R Olson

Publications and source records attributed to N R Olson.

35 records · Page 2Linked to original sources
PubMedDate not supplied

Laryngeal suspension and epiglottic flap in laryngopharyngeal trauma.

Physicans treating laryngeal trauma are still looking for ways to improve results. Severe disruption of the supporting structures between hyoid and trachea may allow stretching and narrowing of the laryngeal lumen during the healing period. This can easily be prevented by placing wires across the disrupted zone. In addition, loss of the epithelial lining of the larynx is a serious cause of stenosis. By dissecting out the epiglottic cartilage, one can create a sizeable, useful flap of mucous membrane based in the vallecula to use in relining of the anterior larynx.

Adult↗
PubMedDate not supplied

Surgical treatment of acute blunt laryngeal injuries.

The best management of acute laryngeal fractures is an approach which promotes healing by primary intention and does not require the use of a lumen keeper or core mold. This presenentation outlines the theoretical considerations and practical steps which make it possible to achieve these goals. The basic emphasis is on proper diagnosis, good surgical exposure and proper wound management. Also included are some ideas about the special anatomical and physiological characteristics of the larynx which make it difficult to obtain primary healing. The material presented is a synthesis of pertinent basic laryngologic research, wound healing theory and clinical experience.

Humans↗
PubMedDate not supplied

Epiglottis in reconstruction of the larynx and trachea.

Many methods have been proposed for reconstruction of the larynx and trachea. An ideal method would utilize tissue which is native to the area, highly viable, convenient to the surgeon, and expendable to the patient. This tissue should be composite, that is, containing both epithelium and skeletal support. This paper describes the use of epiglottis in repair of laryngeal and tracheal defects due to cancer or trauma. The methods of repair include 1) pedicled composite epiglottic flap, 2) free composite epiglottic graft, and 3) pedicled epiglottic mucosal flap. Results in 15 patients are discussed and indicate that use of the epiglottis is an effective method for one-stage laryngotracheal reconstruction.

Adolescent↗
PubMedDate not supplied

Thyroid abscess.

Primary thyroid abscess arising from acute suppurative thyroiditis is an unusual type of head and neck infection. Only 39 cases of thyroid abscess have been reported in the medical literature since 1950. Sixteen of these cases (41%) were in children. This presentation reports in detail two additional adult patients with thyroid abscesses. In addition, the incidence, etiology, signs and symptoms, complications, aids to diagnosis, and management are reviewed. Systemic antimicrobials combined with prompt surgical intervention will prevent the serious complications possible with this disease.

Abscess↗
PubMedDate not supplied

Static and dynamic impact trauma of the human larynx.

The response of fresh human larynges to static and dynamic compressive loading has been determined for 24 specimens. Mean static force values producing thyroid and cricoid cartilage fractures were 15.8 and 20.8 kg, respectively, and the similarity of this experimental injury to a mild clinical laryngeal fracture syndrome is discussed. Dynamic fracture loading, at velocities up to 11 mph, caused cartilage fractures at forces averaging 30% more, and comparison with the static data is made. Interaction of the thyroid and cricoid cartilages to impact force are analyzed in reference to airway protection. The 50% compressive strain level, at which structural collapse is imminent, averaged 55 kg. The significance of these previously unreported low force levels producing fracture is discussed with reference to automotive design.

Accidents, Traffic↗