Antibiotic Therapy Versus Appendectomy for Acute Appendicitis

Study Overview
=================
Brief Summary
-----------------
The purpose of the study is to demonstrate that antibiotic therapy is as safe and effective as appendectomy for the treatment of acute non complicated appendicitis. Two hundred fifty patients will be included in a prospective multicentric randomized trial. The primary endpoint is the rate of intra abdominal infections in both therapeutic strategies. Other criteria will be studied including duration of hospital stay and absence from work during a follow up period of one year, parietal and abdominal complications and recurrent appendicitis after antibiotic therapy.

Detailed Description
-----------------
Appendectomy is the most frequent intra-abdominal operation performed, accounting for the majority of admissions in a general surgery unit. Appendectomy has always been considered the cornerstone in the treatment of acute appendicitis.Nevertheless, the idea of a conservative treatment using antibiotics is not that recent. Current practices have proven the efficiency of antibiotic therapy in treating certain infectious abdominal conditions including: appendicular mass with or without periappendicular abscess and acute diverticulitis. This success has prompted the researchers to consider the exclusive use of antibiotic therapy in the treatment of non complicated appendicitis. In patients with clinical suspicion of acute appendicitis (localized abdominal tenderness, inflammatory reaction...etc) a CT scan will be performed to confirm the diagnosis of non complicated appendicitis. This diagnosis is confirmed on the CT in the absence of any sign of either localized peritonitis, and/or perforation (extraluminal gas, appendicular abscess, or phlegmon). After a thorough explanation of this study, the patient will be obliged to sign a written consent. Patients will be randomly assigned to either one of the two therapeutic modalities : an appendectomy,or an antibiotic treatment consisting of amoxicillin and clavulanate potassium. This therapy will be continued until the normalisation of leucocytic count and C reactive protein are achieved. In order to demonstrate equivalent conclusive results comparing the two treatment modalities, the statistical consultant estimated the inclusion of at least 200 patients in the study. However, after considering the possible loss of a number of patients following their inclusion for a variety of reasons, it was decided that a total of 250 patients will be enrolled. Rate of intra abdominal infections in both therapeutic strategies is the first endpoint to be compared. Duration of pain, diet, hospitalisation, absence from work will also be compared. In the group of patients treated by antibiotics, the rate of persistant and recurrent appendicitis after treatment will be evaluated. Recurrent appendicitis is not considered a complication as long as the recurrence of the appendicitis is uncomplicated. During the followup period of one year, long-term complications will be observed including: abdominal hernia, adhesive intestinal occlusion, and others.

Official Title
-----------------
A Prospective Randomized Multicentric Trial Comparing Amoxicillin/Clavulanate Potassium Therapy to Appendectomy for Acute Non Complicated Appendicitis

Conditions
-----------------
Appendicitis

Intervention / Treatment
-----------------
* Drug: amoxicillin/clavulanate potassium
* Procedure: appendectomy


Participation Criteria
=================
Eligibility Criteria
-----------------
Before CT scanning Inclusion Criteria: Clinical suspicion of appendicitis Age more than 18 years Exclusion Criteria: Clinical signs of generalized peritonitis Previous take of antibiotics within the 5 days preceding the presentation Allergy or intolerance to lactamases and/or clavulanate potassium Corticosteroid or anticoagulant therapy Patient with a known inflammatory bowel disease (Crohn's disease or ulcerative colitis) Pregnant women Patient with iode allergy Renal insufficiency (creatinine > 200 ) CT scanning: Inclusion Criteria: Appendix diameter > 6 mm Exclusion Criteria: Appendix non visualised Signs of localized peritonitis: extradigestive gas fluid collection around the appendix generalized intraperitoneal fluid

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: A<br>appendectomy, actual usual treatment | Procedure: appendectomy<br>* ablation of the appendix by laparotomy or laparoscopy<br>|
| Active Comparator: B<br>antibiotic therapy | Drug: amoxicillin/clavulanate potassium<br>* 1 gramme, 3 times a day, intra venous initially and then orally for one or two weeks<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| rate of intra abdominal infections in both therapeutic strategies |  | 30 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| duration of pain |  | 30 days | 
| duration of hospitalisation |  | 30 days | 
| duration of absence from work |  | 30 days | 
| rate of wound infection |  | 30 days | 
| recurrence of appendicitis |  | 12 months | 
| rate of abdominal hernia |  | 12 months | 
| rate of adhesive intestinal occlusion |  | 12 months | 
| cost |  | 30 days and 12 months | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
appendicitis., adult., treatment., antibiotic therapy., CT scanning., randomized trial, safety