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Biomedical subjects

H Weerda

Publications and source records attributed to H Weerda.

At least 19 recordsLinked to original sources
PubMed1989

[Measures for reducing the rate of complications in endoscopic surgery of Zenker's diverticulum].

In the treatment of the pharyngeal pouch diverticulectomy and endoscopic diverticulotomy are generally accepted. The latter can lead to severe bleeding and mediastinitis. --Therefore the authors have extended the preoperative diagnostic procedure to include a DSA of the aortic arch. The simultaneous contrast filling of the pouch enables the exact position of the blood vessels relative to the bar to be established. --With the spreadable diverticuloscope developed by the authors, the use of a CO2 laser and an operating microscope, optimum endoscopic working conditions are assured. Postoperative sealing of the wound margin with fibrin reduces the likelihood of postoperative bleeding and mediastinitis, the risk of which have been further reduced by antibiotic prophylaxis and tube feeding for eight days. During and after the treatment of ten patients not a single complication has arisen.

Angiography, Digital Subtraction↗
PubMed1986

[Treatment of stenoses of the laryngotracheal junction and the cervical trachea].

In the past 20 years we have operated on 187 patients for tracheal stenoses. Dilatation, tracheopexy with ring support, sleeve resection, and the gutter procedure are described. In recent years we have replaced open treatment of the tracheal gutter with our closed method. After expanding the posterior wall, the anterior tracheal wall is closed with a myocutaneous island flap, rib cartilage or a myomucosal flap. The merits of the different methods are discussed. Dilatation of the trachea and reconstruction of the anterior tracheal wall over a silicone tube in a one stage procedure creates a sturdy trachea, which is better able to resist scar contracture and pressure from the soft parts of the neck than an open U-shaped gutter. The number of operations and days of treatment per patient are materially reduced by the closed method.

Adolescent↗
PubMed1986

[Removal of the iliac crest bone].

The paper covers diagnoses indicating removal of bone from the iliac crest, positioning, an approach to the iliac crest, and techniques for removing bone. The hazards incident to the removal of spongiosa, cortical substance, or spongeous-cortical bone chips are described. Haemorrhages from the spongiosa must be staunched carefully with wax plugs or fibrin glue (Tissucol1). Complications such as perforation, hernia, hyperaesthesia, muscular atrophy, and changes in contour are discussed, as well as suitable measures to avoid complications.

Bone Cysts↗
PubMed1985

[Myomucosal flaps of the tongue for covering defects in the mouth area].

The extraordinarily rich blood supply of the tongue makes it possible to use a variety of pedicled tongue flaps: 1. Defects of the dorsum of the tongue can be covered either with island flaps from the margin or with flaps crossing the midline. 2. Medial defects can be covered by flaps taken from both sides or from the centre of the dorsum. 3. Defects of the tip of the tongue or the front of the floor of the mouth can be filled by island flaps taken from one or both sides of the tongue. Large defects can be crossed by a triangular island flap pulled through a tunnel. 4. For defects in the lateral floor of the mouth an oval shaped flap from the middle of the tongue is pulled through a tunnel into the defect.

Humans↗
PubMed1985

[Operations to improve hearing in auricular malformations. A catamnestic study of 89 operations].

In the last 20 years 89 middle ear operations were performed on 71 patients with unilateral or bilateral microtia (grade II or III). The methods and the results are described and discussed. In 79.5% we produced a wide auditory canal and achieved an overall hearing gain of 17 dB. We usually do not carry out middle ear surgery in unilateral atresia. In bilateral atresia the child is fitted with a bone conduction hearing aid as soon as possible and is operated on at the age of 4 or 5 years. After middle ear surgery we reconstruct the auricle at an age of 5 or 6 years. If necessary these children are then fitted with an air conduction hearing aid.

Child↗
PubMed1984

[Tracheopexy with support frames. An experimental and clinical study].

The use of acrylic frames to support a weak trachea has been successful in 62,9% of the treated cases (in 22 of 35 operations). The use of ceramic frames has been successful in 92,3% of the cases (in 12 of 13 operations). On the basis of experimental studies, we reconstructed in this manner two rigid stenoses of the trachea by a two-stage method. The first stage consists in expanding the stenosis by means of an endotracheal support of silicone rubber tube; the second stage, in suturing ceramic frames to the trachea. Both operations by this method have been successful. Our methods and results are discussed.

Adult↗
PubMed1984

[Development of laryngoscopy].

The development of laryngoscopy is described and the inventions of Kirstein, Killian, Seiffert, Kleinsasser and Weerda are mentioned. The development of microlaryngeal surgery and the anaesthesic techniques are also described.

Europe↗