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Biomedical subjects

A C Gomez

Publications and source records attributed to A C Gomez.

15 recordsLinked to original sources
PubMed1990

Self-entwinement of an active fixation pacemaker electrode.

We report a case in which an active fixation atrial lead tip became entwined on the proximal lead body during implantation. It was not possible to disengage the tip or to remove the resultant lead loop atraumatically through the insertion site. Removal of the lead was accomplished using a Dotter intravascular snare inserted via a femoral vein, with subsequent successful implantation of a new lead. This unusual technique-related complication emphasizes the need for meticulous fluoroscopic visualization during lead manipulation.

Aged↗
PubMed1987

Nerve entrapment after Pfannenstiel incision.

In a 16-month period, nine cases of iliohypogastric nerve entrapment were diagnosed in patients who had undergone a Pfannenstiel incision. Three patients experienced total relief with nerve blocks alone; four patients required surgical interruption of the iliohypogastric nerve to attain total relief; two patients received significant symptomatic relief with injection and desired no further treatment. The presentation, diagnosis, treatment, and prevention of entrapment of the iliohypogastric nerve as a complication of the Pfannenstiel incision are presented and discussed.

Abdominal Muscles↗
PubMed1987

Nerve-entrapment syndromes from lower abdominal surgery.

Patients with a complaint of lower abdominal pain and a history of lower abdominal surgery, particularly inguinal herniorrhaphy, appendectomy, and procedures incorporating a Pfannenstiel incision, should have nerve entrapment considered in the differential diagnosis. Careful history and physical examination in conjunction with selected use of the ilioinguinal-iliohypogastric nerve block can confirm the diagnosis of nerve entrapment and preclude an unnecessary workup of these patients. Of the patients with nerve entrapment, most will experience complete relief of symptoms following serial injections and require no further treatment. The remainder will experience only temporary relief and require surgical interruption of the nerve involved. In those patients who obtain no relief from the nerve block, further workup for a source of their pain is warranted. Most of these patients were found to have a subclinical recurrence of an inguinal hernia.

Abdomen↗
PubMed1979

Changes in the manufacture of expanded microporous polytetrafluoroethylene: effects on patency and histological behavior when used to replace the superior vena cava.

Polytetrafluoroethylene (PTFE) has been used clinically and experimentally as a vein substitute. Since its introduction, changes have been made in the manufacture of the material. This study was designed to evaluate the effects of pore size (fibril length), PTFE cover, and spiral tube support on long-term patency and histological behavior when this material is used as a replacement for the precava in the dog. A graft of 30-mu pore size has adequate fibroblastic ingrowth, a neointima of 200 mu or less, and the best long-term patency. The PTFE cover results in less fibroblastic involvement of the prosthetic graft and prevents late occlusion caused by transmural fibrosis in the 90-mu graft. The spiral support does not affect patency and may be indicated when external pressure on the tube must be avoided.

Animals↗
PubMed1976

Preferred surgical treatment for alveolar cell carcinoma.

An analysis of our experience with 48 patients having bronchiolar or alveolar cell carcinoma is reported. The remarkable biological variability of this peripheral tumor has important surgical implications. Basically, two dominant clinical presentations occur. In the less common diffuse or multinodular form, prolonged survival is infrequent regardless of the therapeutic approach. Often these patients die from respiratory compromise due to the tumor itself. In the more common localized or solitary form the prognosis for cure is good, approximating 47% or higher. Based on the material presented, lobectomy is the preferred method of surgical treatment. In patients manifesting multinodular disease, surgical resection rarely seems warranted. The concept of preserving pulmonary tissue is stressed.

Adenocarcinoma, Bronchiolo-Alveolar↗
PubMed1976

Plasmacytoma arising in a pacemaker pocket.

A 48-year-old man developed a plasmacytoma in the subcutaneous pocket of a titanium covered pulse generator that had been inserted sixteen months previously. The tumor represented a cutaneous manifestation of myelomatosis. The presence of a pacemaker may affect the detection and treatment of tumors arising in the region of pulse generator pockets. Possible cause-and-effect relationships are explored.

Carcinogens↗