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At least 595 records · Page 33Linked to original sources

PubMed1986

[Instruments necessary for safe laser microsurgery].

Special instruments have been perfected for the laser microsurgery. Those instruments must not exceed 18 centimeters in length in order to reduce the possibility of infection through the middle part (microslad) tied up to the microscope. The instruments must be blackened to reduce the casual reflection of the laser ray over the intra-abdominal structures. Molybdenum mirrors with specifically outlined angles to reflect laser rays towards the inaccessible spots and also to strike the aimed tissue at the right place, have been perfected. In the same way, quartz straight and angular rods stronger to the laser fatigue than the pyrex are necessary to absorb laser energy during the vaporization and the excision of intra-pelvic adhesions. Thanks to these adapted instruments, the micro surgeon gynecologist will be able to practise his laser surgery with more safety, less eyestrain and less difficulties.

Humans↗

PubMed1985

[Reduction of bleeding during microsurgery of the middle ear by amiodarone].

Operative bleeding was reduced in 47 patients undergoing middle ear microsurgery by means of an intravenous infusion of Amiodarone. Total doses of the order of 1 mg.kg-1 were remarkably effective without adverse effects. This result is attributed to the capacity of Amiodarone to reduce the increase in blood pressure and particularly the tachycardia induced by release of endogenous (operative stress) and exogenous (local adrenaline infiltrations) catecholamines.

Adolescent↗

PubMed1985

An improved method for electron microscopic study (SEM and TEM) of vessel prosthesis anastomoses in microsurgery.

In order to study the replacement of vessels by biological vascular prostheses in microsurgery, an improved method for scanning electron microscopy preparation which is rapid and minimizes artifacts was developed. To limit endothelial surface injury, the vessel and prosthesis unity is, at first, prefixed by injection into one end of a 2.5% isotonic solution of glutaraldehyde. After fixation by osmium tetroxide, the samples are dehydrated by a graded series of acetone solutions and critical point dried. They are then trimmed around each suture line to pieces of 1 cm including 1/3 vessel and 2/3 prosthesis for further orientation and sectioned longitudinally, with a new razor blade, for microvascular anastomoses observations. The same chemical treatment applied to samples for transmission electron microscopy studies permitted verification of the good preservation of the cellular structures.

Animals↗

PubMed1985

Microsurgery in severe posterior epistaxis.

A brief review of surgery for severe posterior epistaxis has been outlined. Hundred and forty-five (27.3%) patients were treated by transnasal microsurgery in order to undergo ligation of the branches of the sphenopalatine artery in the nasal cavity. The rate of failure was 6.1%. It seems that by using this kind of operation, we can significantly decrease the morbidity in relation to other methods of controlling the posterior epistaxis.

Acute Disease↗

PubMed1979

Electrophysiology of the rabbit oviduct following tubal microsurgery.

The ability of tuboplastic microsurgery to restore electrical continuity across an anastomosis site was investigated in the rabbit. Three to six weeks following transection and end-to-end anastomosis of the tubal ampulla or isthmus, the pattern of electrical activity adjacent to and across the anastomosis site was examined. Recordings were made in vitro using arrays of closely spaced suction electrodes 68 to 72 hours after an ovulating dose of human chorionic gonadotropin. The pattern of electrical activity across anastomosis sites was not significantly different from corresponding portions of unoperated control oviducts. Microsurgical anastomosis restored electrical continuity between anastomosed segments in both the ampulla and isthmus.

Action Potentials↗

PubMed1979

[The possibility of isolated joint transplantation with microsurgery of the blood vessels].

The transplantation of isolated joints with intact blood supply and good biomechanic conditions is possible. Biomechanical and neurotropic disturbances lead eventually to progressive degenerative alterations. The regularly seen periarticular adhesions with reduced joint mobility may also reduce the clinical application. Considering our very good results of joint-replantation also good clinical results of the transplantation with vascular and neural anastomoses may be expected. Microsurgery has a proven place for bridging great bone defects with vascular bone fragments. Histological examinations show a prompt and regular bone metabolism in the transplanted bone.

Animals↗

PubMed1979

[The prism loupe spectacles used as low vision aid and in microsurgery (author's transl)].

In 1970 Biessels developed and constructed the new binocular prism loupe spectacles, mainly as improved low vision aids. They were derived from the Zeiss 8 x 20 prism binoculars, however, with different lenses and mechanical parts. They are quite different from the Galilean telescopic spectacles, hitherto available, with their lower mangifications, short working distances, chromatic aberration, and peripheral unsharpness. The Biessels prism loupes with variable magnification up to 12 times, and working distances of 18 to 30 cm, are mounted into spectacles. They provide for a comfortable stereoscopic vision with normal convergence. The visual field is virtually 20 cm at 25 cm distance, and sharp to the edges. The weight of a complete binocular prism loupe, including the frame, is from 100 to 110 grammes. In the past 7 years more than 500 of such visual aids have been delivered to low vision patients, half of them binocular, also 40 operating spectacles for microsurgery, all of them with great success. Here we report on the technical details and good results.

Eye Diseases↗

PubMed1984

[Microsurgery in urology].

The use of microsurgical techniques offers operative perspectives also in urology. Microsurgery is indicated for reconstructive vascular surgery in the kidneys, in cases of erectile impotence, and in high maldescended testicles, for recanalisation of the vas deferens and in early childhood for plasty surgery of malformations of the upper urinary tract and such of the male genitals. Certain indications are presented under reference to own clinical experiences.

Adult↗

PubMed1983

[Current problems in the microsurgery of peripheral nerves].

The experience with 132 surgical interventions on 203 nerves of the upper extremities in 131 patients, experimental findings obtained in monkeys and extremities of corpses enabled the author to discuss some important questions. The author considers the employment of the microsurgery technique to allow to considerably raise the exactness of comparing the bundles in suturing or plasty of the nerves, to decrease the specific weight of "erroneous" (heterotopic or heterogenic) regeneration of the fibres due to possible identification of the corresponding bundles, to improve the quantity of preparing the nerve ends for suturing. It gave better results in suturing the nerves.

Animals↗

PubMed1984

[Evaluation of 6 years of CO2 laser microsurgery in laryngology].

Laryngeal microsurgery has been performed using a CO2 laser since 1978. It is essential to conduct a strict phoniatric pre-operative examination and to ensure correct anesthesia. Results after 735 operations underline the advantages of this technique for the treatment of benign laryngeal lesions (diffuse papillomatosis, sessile polyps, granuloma), in phonosurgery (nodules, bundle edema, corditis) and in the repermeabilization of the laryngeal network (paralysis, stenosis, laryngeal edema).

Carbon Dioxide↗

PubMedDate not supplied

[Reconstructive microsurgery of the deferens duct. Experimental study of suture material].

The choice of optimal suture material for reconstructive microsurgery of the deferens duct was investigated in the rat. The study was performed on normal deferens ducts and those dilated by proximal ligatures. The absorbable thread (10.0) studied provided a more satisfactory morphological and functional result than a non-absorbable single-filament thread of identical caliber. These findings suggest that this material should be used in clinical practice.

Animals↗

PubMed1984

Combined vitrectomy, intraocular microsurgery and liquid silicone in the treatment of proliferative vitreoretinopathy.

This study investigates the effectiveness of combining vitrectomy, scleral buckling, intraocular microsurgery and liquid silicone injection for the treatment of retinal detachment complicated by proliferative vitreoretinopathy: 48 eyes were treated using these techniques combined. Complete attachment was achieved in 16 eyes (33%), partial attachment in 20 eyes (42%), and 12 eyes (25%) remained detached. Vision was improved in 17 eyes (35%), unchanged in 17 eyes (35%), and worse in 14 eyes (30%). Complications included emulsification of the silicone, glaucoma, cataract, band degeneration of the cornea, reproliferation of membranes and passage of silicone into the subretinal space. Significant preservation of mobility vision was achieved. A larger series of patients with longer follow-up will ultimately determine the place of this technique in the management of this complicated problem.

Combined Modality Therapy↗

PubMed1984

[Distal tubal obstructions: microsurgery or in vitro fertilization].

Laser CO2 microsurgical salpingostomies were performed among 70 infertile patients from 1979 to 1982. 9 patients lost to follow up were excluded. All patients underwent a preoperative hysterosalpingography and a laparoscopy in order to realise a tubal evaluation. 4 groups of tubal damage were defined with a subsequent pregnancy rate of: 66.66% in group I, 37.5% in group II, 5.55% in group III, 0% in group IV. 4 groups of adhesions were defined with a subsequent pregnancy rate of: 42.85% in group 0, 33.33% in group mild, 25% in group moderate, 5.85% in group severe. From this results the authors propose a tubal and adhesions score in order to select patients for microsurgery or in vitro fertilization.

Adult↗

PubMed1984

[Distal tubal microsurgery using the CO2 laser. Experimental study and analysis of a series of 95 cases].

After having used the CO2 laser in gynaecological surgery for 5 years, can we already work out a balance of the effects of laser in this field and especially in tubal microsurgery? An experimental study was carried out on 2 groups of rabbits, the first group being one where artificially created adhesions were freed without any residue thanks to the CO2 laser, and a second group where the uterine cornua could be sutured using pulses of laser and no sutures. 95 microsurgical tubal operations were carried out using the CO2 laser between 1979 and 1983. Adhesiolysis was carried out in 39 patients with 25 intra-uterine and one extra-uterine pregnancies resulting. Fimbrioplasty was carried out in 41 patients with 24 intra-uterine and 2 extra-uterine pregnancies. Salpingostomy was carried out in 15 patients with 5 intra-uterine pregnancies and one extra-uterine pregnancy. A second surgical procedure was carried out in 20 patients with 7 intra-uterine pregnancies and one extra-uterine pregnancy. The CO2 laser makes microsurgical techniques easier and avoids recurrent adhesions, giving rise to a level of pregnancies in the region of 60% after adhesiolysis and fimbrioplasty. This latter term was used for the reconstruction of the ampulla, which had only partially been blocked. On the other hand, when there is a hydrosalpinx with total loss of patency, the laser is no more successful than classical microsurgical techniques.

Adult↗

PubMed1984

[Microsurgery of retinal detachment after perforating injury].

Twenty consecutive retinal detachments (R.D.) after penetrating ocular injury were operated on with vitreoretinal microsurgery. The follow-up after surgery varies from 6 months to 30 months. Retinal reattachment was achieved in 15 of the 20 eyes (75%). The final visual acuity was 0,4 or better in 10 of the 15 eyes operated on with success (66%). Surgical success was achieved in 7 of the 8 R.D. associated with proliferative vitreoretinopathy (P.V.R.) grade C1, C2 and C3; and 6 of the 7 R.D. associated with subretinal proliferation without clinical evidence of epiretinal proliferation. 2 R.D. associated with P.V.R. grade D2 were surgical failures. The patients should be kept under control for a long period of time since gradual shrinkage of the vitreous base may develop beyond 6 months after surgery.

Adolescent↗

PubMed1984

[Microsurgery of the renal arteries].

The extracorporal microsurgery of renal artery branches has improved the therapeutic possibilities of complicated vascular abnormalities. Intrarenal stenoses can only be treated by this technique and excellent therapeutic conditions are rendered possible, if more than two artery branches have to be replaced. The technical results are satisfactory, if the quality of the renal parenchyma is considered, which has been abnormal in a number of cases at the moment of the surgical treatment. The results concerning the arterial hypertension and the renal function are remarkable, when considering the fact that most of the kidneys treated by this technique would have been removed some years ago.

Adult↗

PubMed1984

Thumb reconstruction by microsurgery.

A variety of vascularized toe tissue transfers are available for reconstruction of the thumb. These procedures may provide length, stability, and motion for pinch and grasp, offer adequate sensibility (average two-point discrimination is 15 mm) for prehension, and esthetically simulate the normal thumb better than previous conventional thumb reconstructive procedures. These one-stage procedures have become relatively reliable when performed by reconstructive surgeons experienced in microsurgery. The approach must be thoroughly planned, the surgery is long and meticulous, but the successful results are rewarding. When the wrap-around method is appropriate, it is the procedure of choice because the great toe is preserved.

Hallux↗

PubMed1983

Studies on experimentally induced hydrosalpinges in rabbits--experimental approach for tubo-microsurgery.

Hydrosalpinx proved macroscopically and microscopically which was quite similar to that observed in the damage human fallopian tube could be induced by ligation of the rabbit fallopian tube. Where ligatures have been placed on two places of the fallopian tube, hydrosalpinx can be induced in 100 percent of cases if ligation is done securely. About 1-2 weeks after ligation, no change of ciliated cells was observed in the mucosal fold in SEM findings, nor was there much change in the external shape of non-ciliated cells even though hydrosalpinx was induced. With the lapse of time after development of hydrosalpinx, however, both of these cells on the surface of the mucosal fold gradually changed to loose their normal shapes. After 15 weeks, ciliated cells all but disappeared to be replaced by large, filled, irregular non-ciliated cells. Accordingly, hydrosalpinx in the early stage can be cured fully by tubal salpingostomy using microsurgery. In the case of hydrosalpinx many hours after ligation, however, end-to-end anastomosis of the normal regions should be performed since no recovery can be expected.

Animals↗