Search results for "microsurgery"
showing 10 items of 136 documents
Microsurgical treatment of midfacial tumours involving the skull base
1998
Various approaches to the base of the skull for the treatment of cranial base tumours are described in detail. Advantages and disadvantages of the particular approaches are discussed. This clinical experience is based on 303 neoplasms involving the base of the skull, operated on by the authors. Retrospective survival studies are presented and a review of the literature on the subject is discussed. Utilizing microsurgical techniques the 2-, 3- and 5-year survival rates were significantly improved. The functional and aesthetic outcomes were also dramatically superior compared with standard ablative procedures. Reconstructive postoperative strategies are suggested.
Microlaparoscopic Hernia Repair in Children
2011
Introduction. This study reports the authors’ experience with the exclusive use of 2-mm instrument sets and small diameter scopes in 100 children undergoing microlaparoscopic herniorrhaphy. Method. This prospective study was designed as a pilot feasibility study; all data related to patients and procedures were prospectively collected. A pneumoperitoneum was established, and 1.7 to 2 mm 0° or 30° scopes were introduced for visualization. Exclusively 2-mm instruments were used. Results. This study included 100 children (aged 15 days to 11 years, median age 2.3 years) undergoing microlaparoscopic hernia repair. A total of 140 hernias were treated. The average operative time for the microlapa…
Microsurgical fenestration of perineural cysts to the thecal sac at the level of the distal dural sleeve
2011
Background Surgery for symptomatic sacral perineural cysts remains an issue of discussion. Assuming micro-communications between the cyst and thecal sac resulting in a valve mechanism and trapping of CSF as a pathomechanism, microsurgical fenestration from the cyst to the thecal sac was performed to achieve free CSF communication. Methods In 13 consecutive patients (10 female, 3 male), MRI revealed sacral perineural cysts and excluded other pathologies. Micro-communication between the thecal sac and the cysts was shown by delayed contrast filling of the cysts on postmyelographic CT. Surgical fenestration achieved free CSF communication between the thecal sac and cysts in all patients. The p…
Laser welded vascular anastomosis
1988
A comparative study was undertaken to investigate the application of a specially adapted microsurgical Neodymium Yag Laser system with a wavelength of 1,319 microns and a CO2 laser system for laser assisted microvascular end-to-end anastomosis (LAMA) of the rat femoral artery. Conventionally sutured anastomoses served as controls. Postoperative investigations included patency tests, light microscopy and tensile strength measurements. Both laser systems seem to be equally suitable for LAMA: The patency rates do not differ from those of sutured anastomoses and formation of microscopically small aneurysms occurred predominantly in control animals and only once in laser groups. The clamp time n…
Transanal endoscopic microsurgical excision of pT2 rectal cancer: results and possible indications.
2007
In previous studies, local excision was predominantly established for "low-risk" pT1 rectal cancer. The results obtained with T2 tumors are unclear; recurrence rates of 0 to 67 percent were reported. This study was designed to determine the value of local excision for T2 rectal carcinomas, prognostic factors, and the need for reoperation.After local excision of 649 patients with rectal tumors, pT2 carcinoma was found in 44 patients. In general, immediate reoperation was recommended; however, 24 patients declined further surgery or were not reoperated because of comorbidities. The results were analyzed separately for local R0 resection of low-risk carcinomas and for prognostically unfavorabl…
Indication and technique for the reconstruction of nerve defects in head and neck.
1974
Summary Although the results of peripheral nerve repair have been greatly improved in the last years following the introduction of microsurgery and increased application of free autologous nerve transplants, the use of restorative neuroplasty in maxillofacial surgery has been limited. Prompted by the successful reports on modern neuroplasty, we have introduced the use of autologous nerve transplant to bridge lesions of various cranial nerves. Our experience is based on the treatment of traumatic and tumour-induced defects of the facial nerve, inferior alveolar nerve, accessory and lingual nerve. The anastomosis of nerve was accomplished exclusively under the surgical microscope and microsur…
Preemptive hydrocelectomy in subinguinal varicocelectomy
2008
<i>Background/Aims:</i> The hydrocele rate is very low after microsurgical subinguinal varicocelectomy, but microsurgical expertise is not always available in pediatric centers. We describe a modified technique to reduce the hydrocele rate after subinguinal varicocelectomy performed without an operating microscope. <i>Methods:</i> A retrospective review was performed of 142 non-microsurgical subinguinal varicocelectomies performed at a single pediatric center. In 96 patients, varicocelectomy was combined with the excision and eversion of the tunica vaginalis (‘pre-emptive hydrocelectomy’) while in the remaining 46 cases the vaginalis was left untouched. <i>Resu…
Towards a glioma model for surgical technique evaluation in the rat.
2013
Evaluation of new surgical techniques in animal models is frequently challenging. This article describes the pitfalls, peculiarities and the final best applicable model for evaluating surgical techniques for glioma resection.The C6 glioma cell line and the Sprague-Dawley rat strain were selected. Fifty-thousand glioma cells were stereotactically transplanted in the left hemisphere of 137 male adult rats. Evaluation of solid tumour formation, tumour growth and scheduling of surgical resection was performed by MR scanning at 1, 2, and 4 weeks after transplantation and 3 and 6 months after tumour resection. Microsurgical tumour resection was performed with conventional techniques or with the w…
Safety of Reconstructive Microsurgery in the Elderly Population: a Multicentric Prospective Study
2021
Background: Safety of reconstructive microsurgery in elderly patients is still a topic of debate, because no conclusive evidence exists that provides indications and risk evaluation in elderly patients. The purpose of this study, which the Italian Society for Plastic, Reconstructive, and Aesthetic Surgery (SICPRE) has promoted, is to evaluate the safety and the complication risk of elective reconstructive microsurgery in elderly patients as well as to identify patient- or procedure-related risk factors. The secondary aim is to evaluate the predictive role for complications of the Geriatric 8 score (G8). Methods: A total of 194 consecutive patients from 18 centers, aged 65 or older, who rece…
Contrast sensitivity after implantation of a spherical versus an aspherical intraocular lens in biaxial microincision cataract surgery.
2007
Purpose To determine whether implantation of a microincision intraocular lens (IOL) with a modified anterior surface, designed to compensate for the positive spherical aberration of the cornea in eyes of cataract patients, results in improved pseudophakic quality of vision in pseudophakic eyes after biaxial microincision phacoemulsification. Setting Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany. Methods In a nonrandomized parallel cohort investigation, the visual performance of 52 eyes of 52 patients unilaterally implanted with the aspherical Acri.Smart 36 A IOL (Acri.Tec) were compared with those of 25 eyes of 25 age-matched patients unilaterally implanted with…