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Biomedical subjects

J Sheets

Publications and source records attributed to J Sheets.

9 recordsLinked to original sources
PubMed1991

Hemorrhoidectomy during pregnancy: risk or relief?

Acute hemorrhoidal crisis can occur in the pregnant female. When medical therapy fails to relieve pain, operative intervention may be necessary. The surgeon, however, may be reluctant to operate due to potential complications to the mother and fetus. From July 1983 to July 1989, hemorrhoidectomy was performed in 25 of 12,455 pregnant women (0.2 percent) who delivered in our institution. Twenty-two women were in their third trimester, 80 percent were multiparous, and each had a remote history of hemorrhoidal symptoms, including intermittent pain, bleeding, and protrusion. Closed hemorrhoidectomy was performed under local anesthesia. The surgery was directed at removing only symptomatic disease, which included three quadrants in 14 patients, two quadrants in seven patients, and one quadrant in four patients. All patients experienced relief of intractable pain the day after surgery, except one patient who required a hemostatic packing during the immediate post-operative period. There were no other maternal or fetal complications. Subsequent follow-up for anorectal disease ranged from 6 months to 6 years. Six (24 percent) patients required additional hemorrhoid treatment. Hemorrhoidectomy in selected pregnant patients is safe in our experience.

Adult↗
PubMed1990

Horseshoe abscess fistula. Seton treatment.

A study was undertaken to analyze seton fistulotomy with counter drainage as a treatment modality for horseshoe abscess fistula. In a previous report of 27 patients with partial or complete horseshoe abscess fistula, 24 patients underwent primary fistulotomy and counter drainage with a recurrence rate of 28.6 percent. Two patients were treated by seton fistulotomy and counter drainage with no recurrence. Therefore, nine additional patients underwent this procedure. Recurrent horseshoe abscess fistula occurred in 2 of 11 patients (18.1 percent). Seton fistulotomy with counter drainage has become the authors' operative procedure of choice for horseshoe abscess fistula. This method may prove more effective if the true primary abscess cavity is identified, the seton is removed appropriately, and postoperative care of the cavity is adequate. Method of management is discussed.

Abscess↗
PubMed1986

Nephrocolic fistula.

A patient with nephrocolic fistula secondary to perinephric abscess was treated successfully with nephrectomy, colonic resection, and colocolostomy.

Abscess↗
PubMed1986

Management of anorectal horseshoe abscess and fistula.

Over a 10-year period 69 patients were treated consecutively for posterior and anterior horseshoe abscesses and fistulas. Fifty-nine patients had posterior and ten had anterior abscesses or fistulas. There were 52 patients with acute abscess. Treatment consisted of incision and drainage, incision and drainage with primary fistulotomy, incision and drainage with primary fistulotomy and counter-drainage, and incision and drainage with insertion of seton. Seventeen patients with chronic fistulas were treated by primary fistulotomy with curettage, or incision and drainage with insertion of seton. Patients were followed from three months to ten years with a mean follow-up of three years. No incidences of incontinence were reported in this series. The overall rate of recurrence was 18 percent, and included only patients with posterior abscesses and fistulas. Recurrence was related to the failure to maintain prolonged drainage in the midline after primary fistulotomy. The use of seton for delayed fistulotomy appears to promote wound drainage and precludes premature wound closure. More liberal use of the seton in the treatment of horseshoe abscesses and fistulas is advocated.

Abscess↗
PubMed1986

Rationale for medical or surgical therapy in anal incontinence.

Seventy patients with anal incontinence referred to a colorectal service over a two-year period were evaluated and treated. In each case, a comprehensive history and physical examination as well as anal manometry were performed. Anorectal angle measurement was done when indicated. Patients were separated into groups of the four major causes of incontinence: 1) external/internal sphincter dysfunction, 2) puborectalis and anorectal angle, 3) alterations in rectal compliance, and 4) sensory deficits. Treatment was dictated by categorization of the patients. All patients were followed for a minimum of one year and, with the exception of patients with profound sensory loss, each believed that their symptoms had decreased substantially, enabling them to return to normal occupational and social activities.

Anal Canal↗
PubMed1984

A review of 1,147 cases of Sheets lens implantations.

A review of 1,147 Sheets Style 30 intraocular lens implantations is presented. The incidence of complications is similar to or less than that of J-loop lenses. In-the-bag placement appears to eliminate some of the problems associated with J-loop lenses placed in the ciliary sulcus.

Humans↗
PubMed1980

Experimental brain stem displacement. Its implications in the upward and downward herniation syndromes.

6 dogs were anesthetized and a silver clip attached to a cotton plug as surgically placed in the aqueduct of Sylvius. An immediate postoperative lateral skull film was obtained to demonstrate the position of the clip. The animals developed signs of hydrocephalus within hours after the procedure. 2 weeks after placement of the aqueduct plug, the animals recieved a permanent ventriculostomy. Immediate pre- and postoperative ventriculostomy lateral skull films were taken again to indicate position of the silver clip. Finally, a lateral skull film was taken 2 weeks after ventriculostomy and just prior to sacrifice. Radiological techniques were standardized. In this experimental setting downward brain stem herniation predominated and upward herniation of the brain stem was an infrequent occurrence.

Animals↗
PubMedDate not supplied

Modified electrodes with synthetic biocatalytic membranes.

A biocatalytic membrane based on an immobilized enzyme molecule has been prepared. Oxidative electropolymerization of 8-hydroxyquinaldine (8-OHQ) monomers in 0.2 M, pH 7 phosphate buffer containing glucose oxidase (GOx) has been carried out to modify the surfaces of GC, Au, and Pt rotating disk electrodes. The biocatalytic properties of the synthesized membrane were characterized by studying the catalytic activities of the immobilized GOx. Signals obtained from modified GC electrodes with this biomembrane were mainly attributed to the immobilized GOx. Signals obtained from modified Pt or Au electrodes were due to the combined contribution of the enzyme and the native electrode's material. The potential analytical applications of these modified electrodes as bioelectrochemical sensors were also investigated.

Biotechnology↗