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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT00413855
Other study ID # 9335
Secondary ID
Status Completed
Phase Phase 3
First received December 19, 2006
Last updated December 19, 2006
Start date September 1994
Est. completion date June 2005

Study information

Verified date December 2006
Source Maxima Medical Center
Contact n/a
Is FDA regulated No
Health authority Netherlands: Medical Ethics Review Committee (METC)
Study type Interventional

Clinical Trial Summary

It is questionable whether elective appendectomy can effectively reduce pain in persistent or recurrent lower abdominal quadrant pain due to chronic appendicitis.

A single centre randomised double-blind sham surgery controlled clinical trial studied the effects of elective laparoscopic appendectomy on postoperative pain perception in patients with persistent or recurrent lower abdominal quadrant pain on abdominal pain at 6 months postoperatively. Secondary outcome was the relation between clinical response and the appendix’ histopathology. The analysis was performed on an intention-to-treat basis. Pain scores were compared using a Fisher’s exact test.


Description:

Forty patients were randomised, 18 patients had a laparoscopic appendectomy and 22 patients had a laparoscopic inspection only. The postoperative pain scores were significantly different favouring appendix removal (p < 0.01). Relative risk calculations indicated a 2.4 fold (95% CI: 1.3 – 4.0) greater chance of improving or becoming pain free after laparoscopic appendectomy. The number needed to treat was 2.2 patients (95% CI: 1.5 – 6.5). There was no significant relation between postoperative pain scores and histopathology findings.

Conclusions Chronic or recurrent appendicitis is a realistic clinical entity that can be treated successfully by elective appendectomy leading to significant pain reduction in properly selected cases. Histopathology of the removed appendix does not contribute to the diagnosis.


Recruitment information / eligibility

Status Completed
Enrollment 40
Est. completion date June 2005
Est. primary completion date
Accepts healthy volunteers No
Gender Both
Age group 15 Years to 45 Years
Eligibility Inclusion Criteria:

- Patients were eligible if they were between 15 and 45 years of age, and if they suffered from chronic or recurrent right lower abdominal quadrant pain for more than three months. They were to experience continuous pain, or should have endured at least one pain attack in the month prior to inclusion.

Exclusion Criteria:

- Exclusion criteria consisted of (a history of) chronic back pain, previous abdominal surgery (with the exception of diagnostic laparoscopies or a laparoscopic sterilization), specific gastro-intestinal entities (such as inflammatory bowel disease) and gynaecological disease (all female patients consulted a gynaecologist). Routine laboratory investigations included hemoglobin rate, serum leukocyte count and differentiation, C-Reactive Protein concentration, Erythrocyte Sedimentation Rate, faeces cultures and urine sedimentation. Barium contrast studies of the colon were done in all patients, abdominal ultrasound or enteroclysis on discretion. Finally, exclusion was possible when diagnostic laparoscopy revealed abnormalities (see below).

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Double-Blind, Primary Purpose: Treatment


Related Conditions & MeSH terms


Intervention

Procedure:
laparoscopic appendectomy or not (surgery)


Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
Maxima Medical Center

References & Publications (1)

de Kok HJ. Laparoscopic appendectomy: a new opportunity for curing appendicopathy. Surg Laparosc Endosc. 1992 Dec;2(4):297-302. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Primary outcome: pain reduction
Primary The primary outcome measure was pain scored by the blinded patient at 6 months postoperatively
Secondary Secondary outcome: histopathology
Secondary The secondary outcome parameter was the relation between clinical improvement and histopathological findings of the removed appendices