Irrigation Versus No Irrigation for Perforated Appendicitis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00854815
Recruitment Status : Completed
First Posted : March 3, 2009
Last Update Posted : August 1, 2012
Information provided by (Responsible Party):
Shawn St. Peter, Children's Mercy Hospital Kansas City

March 2, 2009
March 3, 2009
August 1, 2012
December 2008
June 2012   (Final data collection date for primary outcome measure)
Post-operative abscess [ Time Frame: 1 month ]
  • Post-operative abscess [ Time Frame: 1 month ]
  • procedure charges [ Time Frame: 1 day ]
Complete list of historical versions of study NCT00854815 on Archive Site
  • operating time [ Time Frame: 1 day ]
  • length of stay [ Time Frame: 2 weeks ]
Same as current
Not Provided
Not Provided
Irrigation Versus No Irrigation for Perforated Appendicitis
Irrigation Versus No Irrigation for Perforated Appendicitis
The purpose is to quantify the effect of irrigation during laparoscopic appendectomy for perforated appendicitis.

This will be a prospective, randomized clinical trial involving patients who present to the hospital with perforated appendicitis. This will be a definitive study.

Power calculation was based on abscess rate in the previous prospective study. An unacceptable abscess rate needed to be chosen. Our current rate is 20%, or one-fifth of the patients. If this were to increase by 15%, it would place just over one third of the patients at risk which would be unacceptable. This is comparable to the 36% rejection level we used for the previous IRB approved trial (#07 02-031). Using a delta of 0.15 with alpha of 0.05 and power of 0.8, the sample size is 109 patients in each arm. Therefore we will anticipate enrolling 220.

Subjects will be those children who are found to have severe inflammatory changes on imaging or a high clinical suspicion of perforation. Permission will be obtained from parents prior to the operation. All of these children will be under duress prior to randomization, therefore we request waiving assent as we have done with the previous perforated appendicitis studies.

The final decision to include a child in the study will made after perforation has been visually confirmed during surgery. Perforation will be defined as an identifiable hole in the appendix or stool in the abdomen. The randomization assignment will be made known at the initiation of the operation, and confirmation of perforation will confirm the patient will utilize the next randomization slot.

The irrigation group will have suction irrigator set up with a 1 liter bag of normal saline. The surgeon must use at least 500 ml of this bag but may use as much as they choose.

The no irrigation group will have the suction irrigator set up without the saline attachment. This will leave them with the capacity for suction only. Since several suction devices exist, this will assure the same type of suction for both groups.

After the operation, both groups will be managed in the same manner. When the patient is tolerating a regular diet, on oral pain medication and has been afebrile for over 12 hours, they will be discharged on oral antibiotics to complete a course of 7 days. If they stay until the 5th post-operative day, a white blood cell count will be checked, which if it is normal, they will be discharged to home without antibiotics. This is standard post-operative care as delineated by our previous prospective, randomized.

Not Applicable
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Perforated Appendicitis
  • Procedure: Irrigation
    Irrigation of the area with at least 500ml NS using the power suction/irrigator
    Other Name: washout
  • Procedure: No Irrigation
    Suction only using suction/irrigator
    Other Name: suction
  • Active Comparator: Irrigation
    Irrigation of the area with at least 500ml normal saline using the power suction/irrigator
    Intervention: Procedure: Irrigation
  • Active Comparator: No Irrigation
    Only suction with the power suction/irrigator without saline attached
    Intervention: Procedure: No Irrigation
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Same as current
June 2012
June 2012   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Under 18 yrs old
  • Perforation identified as hole in the appendix or fecalith in the abdomen

Exclusion Criteria:

  • No perforation
  • A significant comorbidity that would limit their ability to recover from appendectomy in a normal fashion
Sexes Eligible for Study: All
1 Month to 17 Years   (Child)
Contact information is only displayed when the study is recruiting subjects
United States
08 11 181
Not Provided
Not Provided
Shawn St. Peter, Children's Mercy Hospital Kansas City
Children's Mercy Hospital Kansas City
Not Provided
Principal Investigator: Shawn D St. Peter, MD Children's Mercy Hospital Kansas City
Children's Mercy Hospital Kansas City
July 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP