Search PubMed⌕ Search

Biomedical subjects

B Strauch

Publications and source records attributed to B Strauch.

At least 37 records · Page 2Linked to original sources
PubMed1996

Free fibula flap mandible reconstruction for oral obstruction secondary to giant fibrous dysplasia.

Fibrous dysplasia is a disorder of bone that may be associated with endocrinopathies and skin pigmentation. The pathologic, proliferative expansion and distortion of the skeleton is of unknown etiology. Craniofacial involvement that includes the mandible can exhibit gigantic disproportions and dysfunction. Treatment has evolved to include more aggressive strategies of resection and sophisticated reconstructive techniques. The reported case is noteworthy for the unrelenting growth of craniofacial fibrous dysplasia in an adult female with endocrinopathies, progressing to oral obstruction that required urgent treatment utilizing immediate free bone-flap reconstruction. The free fibula flap was employed to restore mandibular continuity after palliative subtotal mandibulectomy. Bony healing to dysplastic tissue occurred in the remaining mandibular segment. This case illustrates that fibrous dysplasia has the capacity for virulent regrowth subsequent to conservative resection. Defects following radical surgery for giant fibrous dysplasia of the mandible can be reconstructed with a microsurgical bone-flap technique.

Adult↗
PubMed1996

The effect of epigastric vessel ligation on the vascular territories of the pig rectus muscle.

In a pig model, unilateral ligation of the inferior epigastric vessels caused an initial decrease in normal vascularity, followed by an increase toward normal vascularity, in the inferior portion of the rectus muscle over 42 days. Ligation appeared to dilate the choke vessels between the superior and inferior arterial territories. The results indicate that by ligation of the inferior epigastric vessels, the vascular territory, which is normally tenuous, can undergo a transposition without vascular compromise.

Animals↗
PubMed1994

The use of pentoxifylline in microvascular surgery.

The authors studied the effect of pentoxifylline (Trental), a hemorrheologic agent that increases erythrocyte flexibility and augments microcirculatory blood flow, on the patency of a known thrombosis model. In Sprague-Dawley rats, a double-blind study was performed, with animals receiving either intraperitoneal injections of pentoxifylline (20 mg/kg/day) or saline in an equivalent volume, 4 weeks prior to surgery and continued for 1 week postoperatively. In all animals, the left femoral artery was used for a 2-mm arterial inversion graft (AIG), and the contralateral femoral artery for a 2-mm crush injury model. In the control group, patency of the AIG was 0 percent (0/19) and that of the crush model 31 percent (6/19). The pentoxifylline-treated group showed an AIG patency of 37 percent (7/19) and a crush model patency of 84 percent (16/19). p values were .004 and .005, respectively. Furthermore, hematoma formation was associated with none of the control sides (0/38) and only with 5 percent (2/38) of the pentoxifylline-treated animals. This study demonstrated statistically significant improvement on microvascular patency in animals treated with pentoxifylline, whether they were in the crush or the arterial inversion graft groups. The clinical ramifications of using a hemorrheologic agent that improves microvascular circulation, without effecting changes in coagulation, are apparent.

Animals↗
PubMed1994

Monobloc correction of external nasal deviations.

Nine patients (7 men, 2 women) with external nasal deviation underwent corrective procedures using a monobloc nasal osteotomy technique. The deformities ranged from mild to severe. Eight patients had post-traumatic deviations, whereas 1 had a unilateral cleft nasal deformity. For this monobloc technique, osteotomies were performed at unequal levels to correct the height difference, no periosteal undermining was performed, and septal dissection was undertaken only after monobloc repositioning. There was no need for grafts or microplate fixation. Minimum follow-up was 8 months. All patients had improvement in their external deviation, 1 patient was mildly undercorrected, and only 1 patient (cleft nasal) required a radical submucosal resection.

Adolescent↗
PubMed1994

[Video technology and the personal computer in the therapy simulator].

PURPOSE: Technical progress in the development of radiation therapy simulators provided valuable addition of electronically stored images and monitor indicators for individual radiation parameters. One can store as well as print these data as a treatment plan. The possibility of supplementing older simulators with these technical options will be reported in the following paper. METHODS: The modification of our simulator installation was done simply. The new equipment needed to expand our simulator facility was almost exclusively derived from the fields of entertainment and home electronics (Visualizer/video camera, video tape recorder, video mixer, additional monitor; personal computer and printer). RESULTS: With these modifications we reached the technical standards of the latest simulator generation. In addition, we succeeded in implementing additional technical options: e.g. image inversion with contrast alignment to diagnostic displays, complete magnetic tape recording of the entire x-ray process with possible repetition, electronic overlapping of the simulator image and the diagnostic image (e.g. NMR; angiograms) to determine the treatment volume, automation in x-ray documentation. CONCLUSION: Increased precision and rational work steps employing readily available equipment will lead to further improvement in the quality of radiotherapy.

Computer Systems↗
PubMed1994

Pharyngeal flap revisions: flap elevation from a scarred posterior pharynx.

Twenty-one consecutive patients who had earlier superiorly based pharyngeal flap surgery and persistent velopharyngeal insufficiency were seen between 1976 and 1991. Patients were divided into two treatment groups, depending on the results of videofluoroscopic and nasopharyngoscopic assessment. The first group consisted of 18 patients who had bilateral port insufficiency and required a complete reconstruction of a new superiorly based pharyngeal flap that was elevated from a scarred posterior pharyngeal wall. After an average follow-up of 6.2 years, 15 patients had normal resonance, 2 patients had improvement but continued hypernasality, and 1 patient was hyponasal. The second group consisted of 3 patients who had "patch" flaps to a unilateral port insufficiency. Postoperatively, all 3 of those patients had normal resonance. Indications for the decision to "redo" or patch flaps are described.

Adolescent↗
PubMed1993

Distraction of the frontal bone outside the cranial plane: a rabbit model.

Distraction of the frontal bone outside the cranial plane using the Ilizarov principle was performed in 17 22-week-old New Zealand white rabbits. Five rabbits had frontal bone osteotomy only and were in the control group; 5 rabbits were placed in the sham control group and had frontal bone osteotomy plus application of a customized headgear appliance; and 7 rabbits were placed in the experimental group, which underwent frontal bone osteotomy application of the headgear and distraction. The frontal bone was elevated 1 mm every other day for a period of 8 weeks, and the animals were then killed. Cephalometry was performed both preoperatively and at the end of the 8-week period. Histological examination of the skulls was also performed. The experimental group showed a significantly elevated frontal bone compared to the sham control group (p < 0.05). Callous bone filled the distracted segment, which united the frontal bone with the cranial plane. Therefore, frontal bone advancement by distraction osteogenesis is possible using this rabbit model.

Animals↗
PubMed1991

Pharyngeal flap surgery in adults.

The elimination of hypernasal speech in patients with cleft palate following pharyngeal flap surgery in childhood is well established. However, pharyngeal flaps in adults have been considered to yield more modest results. This study reports on 20 adult patients with cleft palate-related hypernasality who underwent pharyngeal flap surgery. Normal nasal resonance was achieved in 15 cases, hyponasality occurred in 3 cases, and hypernasality persisted in 2 cases. However, speech intelligibility was not always dramatically improved. Indications and outcome were found to be highly dependent on preoperative articulation.

Adolescent↗
PubMed1990

Arterial system of the fingers.

The arterial system in 141 fresh human cadavers was studied under the operating microscope using magnifications of 8 to 25 times. The vascular system was injected with latex material alone for identification of the vessels during dissection, and with latex and lead for x-ray contrast studies. An overall repetitive pattern in size, location, and distribution of the vessels was noted. The dorsal branches of the paired digital vessels in each phalanx were generally 4 and demonstrated a regular, repetitive distribution corresponding to: a, condylar vessel; b, metaphyseal vessel; c, dorsal skin vessel; and d, transverse palmar arch. Proximal and middle transverse palmar arches were found always in relation to the cruciate ligaments. The distal transverse palmar arch lay just distal to the insertion of the profundus.

Arteries↗
PubMed1990

pH-balanced solutions with superoxide dismutase (SOD): an attempt to increase island groin flap survival in rats.

Balanced salt solution (BSS) and balanced salt solution plus (BSS+), alone and in combination with heparin or superoxide dismutase (SOD), were used as irrigation solutions for rat groin flaps after prolonged ischemia. SOD always improved flap survival when it was present in solution, although when combined with BSS and BSS+, it was less effective than when combined with Ringer's lactate. The physiological pH solutions BSS and BSS+ had no advantages over Ringer's lactate in any of the tested combinations.

Administration, Topical↗
PubMed1990

A prospective clinical evaluation of autogenous vein grafts used as a nerve conduit for distal sensory nerve defects of 3 cm or less.

The purpose of this study was to determine the efficacy of autogenous vein grafts as nerve grafts (AVNC) for bridging of small peripheral sensory nerve gaps as compared with direct repair and with conventional nerve grafting techniques (ANG). Patients with painful neuroma or segmental nerve injury of 3 cm were chosen as the test group. Those amenable to direct repair were classified as controls. Between 1982 to 1988, a total of 22 patients were enrolled in this study. A total of 34 nerves were repaired, 15 with a venous nerve conduit, 4 with a sural nerve graft, and 15 with direct repair. Significant symptom relief and satisfactory sensory function return were uniformly observed. The two-point discrimination measurements indicated superiority of direct repair and probably of conventional nerve grafting. However, the universally favorable patient acceptance and the return of measurable two-point discrimination indicates the effectiveness of autogenous vein grafts as nerve conduits when selectively applied to bridge a small nerve gap (less than or equal to 3 cm) on nonessential peripheral sensory nerves.

Adult↗
PubMed1990

Preserved tendon grafts in reconstructive hand surgery: a review.

The authors discuss the use of tendon grafts, primarily in flexor tendon repair, a problem not yet satisfactorily resolved. Criteria for successful non-autogenous tendon grafts are presented, with interest focussing on the immunologic antigenicity of the grafts and the physiologic properties and processes of tendon regeneration. Methods for preserving tendon grafts, including freeze-drying and the use of various chemical agents, are compared and recommended, as well as methods for managing tendon grafting procedures. Questions remaining to be answered in the area of preserved tendon grafts are raised, with suggestions for some answers and avenues for future research. Possibilities for wider clinical applications of the procedure are supported and discussed as well.

Hand↗
PubMed1989

Replacement of upper esophagus: results with myocutaneous flap and with gastric transposition.

The authors reviewed 25 cases of pharyngoesophageal replacement. A tubed pectoralis major myocutaneous flap was employed in ten cases where an adequate distal resection margin could be obtained above the thoracic inlet. Total gastric transposition was used in 15 cases where resection extended into the mediastinum. The overall rates of complications (52%), postoperative mortality (20%), and satisfactory deglutition (80%) were similar for both operations and were superior to those achieved with reconstructive procedures previously used by the authors. The choice of method is influenced by the length of the pharyngoesophagus to be replaced and the general condition of the patient. Gastric transposition is a more versatile operation and is adaptable to replacement of the entire esophagus if necessary, while the tubed pectoralis major myocutaneous flap has proven particularly effective for the rehabilitation of elderly and severely debilitated patients.

Aged↗
PubMed1989

[Possibilities of using preserved tendon in hand surgery. Review of the literature].

Authors review the possibilities of the use of conserved tendon, especially on the field of flexor tendon reconstruction--a problem that can not be considered to be solved entirely. The requirements of the conserved tendon are reviewed, the question of the antigenicity is emphasized and the process of tendon regeneration, using conserved tendon, is described. The various procedures of conservation e.g. freeze drying and different chemical methods are compared and the criteria of the use of conserved tendon are discussed. The possibilities of the use of conserved tendon are mentioned, several questions, requiring further investigations, are posed. A wider use of conserved tendon in the future is recommended.

Hand Injuries↗