Gerhard F. Buess

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A new endoscopic surgical method was developed for removal of large sessile adenomas of the rectum and lower sigmoid. Stereoscopic sight and magnifying glasses do allow precise surgery of these tumors. If adenomas are present they can be removed using the technique of mucosa excision; if on the other hand rectum carcinomas have to be removed the complete(More)
A retrospective survey of 7 European centers involving 20 surgeons who undertook 1,236 laparoscopic cholecystectomies was performed. The procedure was completed in 1,191 patients. Conversion to open cholecystectomy was necessary in 45 patients (3.6%) either because of technical difficulty (n = 33), the onset of complications (n = 11), or instrument failure(More)
Sessile adenomas are predominantly localized in the rectum and lower sigma. Surgical removal is indicated but often implies an invasive surgical procedure. Using conventional transanal surgical techniques, only the lower rectum can be reached and there are high rates of recurrence. The new technique combines an endoscopic view of the rectum under gas(More)
BACKGROUND Local therapy of early rectal carcinoma has become an alternative to the classical radical operation which has a higher morbidity and mortality rate. METHODS Rectal carcinoma was treated by transanal endoscopic microsurgery (TEM) in 113 patients. The indications for the procedure were pT1 low-risk tumour, advanced tumour in high-risk patients,(More)
A new transanal endoscopic operative technique permits microsurgery in the rectal cavity and the placing of surgical sutures. Compared with other procedures this one is non-aggressive, and there were not postoperative complications in twelve cases. A stereoscopic optical system, a new operating rectoscope and special surgical instruments, as well as a(More)
Common video systems for laparoscopy provide the surgeon a two-dimensional image (2D), where information on spatial depth can be derived only from secondary spatial depth cues and experience. Although the advantage of stereoscopy for surgical task efficiency has been clearly shown, several attempts to introduce three-dimensional (3D) video systems into(More)
The anatomy of the pelvis makes it difficult to perform local excisions in the rectum when the tumor is some distance from the anal verge. We have, therefore, developed a new minimally invasive technique for tumor resection. A rectoscope with a 40-mm diameter permits tumor resection under stereoscopic control in the gas-dilated rectal cavity. Excisions in(More)
  • G Buess
  • Journal of the Royal College of Surgeons of…
  • 1993
Transanal endoscopic microsurgery (TEM) is performed with the use of a complex operative system, which allows the application of all surgical techniques for dissection and suturing inside the rectal cavity up to a height of 20 cm from the dentate line. Gas dilation and stereoscopic vision give an optimal overview during the procedure. In sessile adenomas(More)
Seventy-five patients with sessile adenomas or early carcinomas of the rectum or rectosigmoid were operated on with the new technique "transanal endoscopic microsurgery" Employing a newly developed complex endoscopic operating system, complete removal of sessile adenomas can be accomplished up to a distance of 25 cm from the anal verge, accurately and(More)