Biomedical subjects

A Berghaus

Publications and source records attributed to A Berghaus.

97 records · Page 6Linked to original sources

PubMed1986

Surgical concepts for reconstruction of the auricle. History and current state of the art.

We compiled and evaluated the world literature on auricular reconstruction, for a total of over 400 publications, more than 200 authors, and over 3,300 reported cases. We found that partial reconstructions were already performed as early as 600 BC; total reconstructions were still considered impracticable in 1830. But since 1891, more than 40 different cartilaginous, osseous, and alloplastic frame materials have been described. Only eight of these were still being applied in the last decade, with autogenous costal cartilage and silicone as the leading substances. Results of the operation can be improved by special surgical manipulations, eg, the "fan-flap" technique. Taking into consideration the complication rate, the number of individual interventions, and the stability of the results, we devised a special point system that makes possible a limited assessment of the different surgical techniques.

Cartilage↗

PubMed1985

Porous polyethylene in reconstructive head and neck surgery.

Porous polyethylene is a thermoplastic synthetic with a pore size ranging from about 100 micron to 200 micron. In addition to other materials, it is used for alloplastic replacement of auditory ossicles. Experimental and clinical experience in our department in recent years has shown that porous polyethylene, due to its good formability, tissue tolerance, and stability is suitable for use in reconstruction of other cartilaginous and bony structures. Therefore, it has been used successfully in reconstruction of the outer ear, in repairing defects of the facial skull, and in rebasing paralyzed vocal folds. Its use in the inner nose to replace the cartilaginous septum or rebase the mucosa in ozena, however, cannot be recommended. The suitability of the material for alloplastic tracheal replacement is investigated experimentally.

Ear, External↗

PubMed1984

Porous polyethylene and proplast: their behavior in a bony implant bed.

A comparative animal study showed that, after implantation in skull defects in guinea pigs, porous high-density polyethylene (PHDPE) was substantially better anchored in the bone than Proplast, and had greater stability of form and structure. In Proplast, ingrowth of fibrous tissue caused partial structural dilatation and fragmentation, which could limit its suitability for use in reconstructive surgery.

Animals↗

PubMed1984

[Our concept of the formation and closure of a tracheostoma].

Better functional and cosmetic results are achieved after the closure of an epithelialized tracheostomy if a method suited to the closure technique is selected when the stoma is first created. We choose a horizontal skin incision which also allows an incision running along the tension lines of the neck to be used when closing the tracheostomy. The flap from the anterior tracheal wall reported by Björk is of functional value and for closure of the stoma also. When the skin has been previously damaged, we suggest covering the defect in patients with tracheal fistulae by a bridge flap from the neck skin, avoiding the use of distant flaps which are cosmetically less favourable.

Female↗

PubMed1983

[Porous synthetic materials in external ear reconstruction].

An investigation was done on the suitability of four porous synthetic materials--Dacron, porous polyethylene, Proplast II and Teflon--for use as a framework in external ear reconstruction. For this purpose, folded implants up to 1,8 mm thick were implanted under the abdominal skin of rats to create a standing skin fold. The fibrin glue proved useful. After 10 months the most convincing of the synthetic materials was porous polyethylene, which offered advantages over the other materials in handling, and retained a lasting form. This synthetic was also used in clinical reconstruction of the external ear.

Animals↗

PubMedDate not supplied

Closure of perforations of the septum including a single-session method for large defects.

It is the impression of the authors that, although the overall frequency of septal perforations has decreased, the proportion of large defects has increased. Therefore, in addition to the methods for surgical treatment of small perforations, a particular description is given of a new procedure in which an extramucosal technique is used, which permits closure of even large perforations in a single session. Very large defects of more than about 2 cm in diameter can be closed most reliably with a three-step procedure using a pedicled flap from the oral vestibule.

Humans↗

PubMedDate not supplied

Unilateral hallucinations and other psychotic symptoms due to otosclerosis.

We report the case of a 35-year-old man suffering from otosclerosis and unilateral auditory hallucinations as well as other psychotic symptoms that disappeared completely after surgery for otosclerosis. The patient experienced a change of his acoustic sensations: the tinnitus was transformed into music, and 4 months later the music changed into commenting and imperative voices. However, on both occasions the transformation from one form to another occurred during an alcohol withdrawal syndrome characterized mainly by vivid visual hallucinations. Some theoretical considerations on hallucinatory predisposition, development of hallucinations, and psychological factors determining psychotic symptoms will be discussed.

Adult↗