Association between the Alvarado score and surgical and histopathological findings in acute appendicitis.

Objective: to compare the results of the Alvarado score with the surgical findings and the results of the histopathological examination of the appendix of patients operated on for acute appendicitis.

Methods: we conducted an observational study with a cross-sectional design of 101 patients aged 14 years and over undergoing emergency appendectomy. The evaluation comprised the Alvarado score, gender, age, ethnicity and time of evolution.

Tensile strength study of the abdominal wall following laparotomy synthesis using three types of surgical wires in Wistar rats.

Purpose: To study the tensile strength of the abdominal wall following laparotomy synthesis utilizing three types of surgical wires.

Methods: Thirty Wistar rats were randomized into three groups of ten rats each. Each group underwent a 3cm-laparotomy which was closed with 3-0 polyglactin 910, polyglecrapone and catgut wires.

Considerations that may influence the result of trials assessing tensile strength in experimental surgery.

Purpose: To provide information gathered upon the execution of trials assessing tensile strength in experimental surgeries.

Methods: Descriptive study considering details on the execution of trials assessing tensile strength in experimental surgery.

Results: The analysis of the rupture force in a mechanical test machine is an adequate technique since it provides precise and quick results.

Experimental study comparing the tensile strength of different surgical meshes following aponeurotic-muscle deformity synthesis on Wistar rats.

Purpose: To assess the tensile strength of polypropylene and polypropylene associated with polyglactin meshes (Vypro II--Ethicon, Somerville, NJ, USA) in a situation of partial separation of abdominal muscle aponeurosis on rats.

Methods: Thirty rats were used of the Wistar strain, which were randomized into two groups of 15 specimens each. In both groups an aponeurotic-muscle deformity was created on the abdominal wall measuring 3.

[Rats resistance to fecal peritonitis when subjected to total splenectomy and auto-implant of the spleen in the retroperitoneum].

Purpose: This study was developed to evaluated the effects of spleen transplants in the protection against abdominal sepsis in young and old Wistar rats.

Methods: Fifty-four young and old Wistar rats were utilized (90 and 180 days respectively) being distributed in three groups as follows: Sham Group, where the animal were submitted to laparotomy with manipulation of only intestine (n=12 young and adult animals), Splenectomy Group, in which the animals were subjected to total splenectomy (n=20 young and adult animals) and an Auto-implant Group, where the animals were subjected to total splenectomy and a third of the spleen was implanted in a bag in the retroperitoneum (n=22 young and adult animals). After three months the animals were subjected to a new laparotomy with binding and caecum perforation to stimulate abdominal sepsis and were accompanied until the moment of death to establish a mortality curve.