Working… Menu

Clinical Implication of DAC (Detrusor After-contraction) (DAC)

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: NCT01154946
Recruitment Status : Completed
First Posted : July 1, 2010
Last Update Posted : July 1, 2010
Information provided by:
Seoul National University Hospital

Brief Summary:

The aims of this study are

  • to confirm whether detrusor after-contraction (DAC) is a true contraction or not with a new approach
  • and to understand clinical implication of DAC

Condition or disease
Voiding Dysfunction

Detailed Description:
The definition of detrusor after-contraction (DAC) is usually accepted as the increase of detrusor pressure (Pdet), whether it is sudden or not, after cessation of urinary flow. The amount of increase in Pdet is sometimes included in the definition of DAC (14, 15, 20 cmH2O or at least two times the level of the maximal Pdet during the voiding phase). However, it is clear that the lack of a well-established definition may induce much bias in the interpretation of the clinical implication of DAC. The previous studies showed a wide range of prevalence.1-4 DAC seemed to occur more frequently in children and the occurrence rate usually decreased with age in urodynamic studies.

Layout table for study information
Study Type : Observational
Actual Enrollment : 2309 participants
Observational Model: Case-Control
Time Perspective: Retrospective
Official Title: A New Approach to Clinical Implication of Detrusor After-contraction (DAC)
Study Start Date : January 2007
Actual Primary Completion Date : December 2008
Actual Study Completion Date : December 2008

DAC group
patients who show detrusor after-contraction during voiding cystometrography (CMG)

Primary Outcome Measures :
  1. to confirm whether DAC is a true contraction or not [ Time Frame: up to 2 years (2007.Jan-2008.Dec) ]
    no change of Pdet when patients cough could confirm that DAC was a true contraction. Because an artifact occurred when a catheter was pressed against bladder wall or urethra, no change of intravesical pressure and increase of abdominal pressure finally induced a negative deflection of Pdet and this change of Pdet could be regarded as an artifact.

Secondary Outcome Measures :
  1. Past medical history including neurological disorders and pelvic irradiation were also included in the database [ Time Frame: up to 2 years (2007.Jan-2008.Dec) ]
    One-way analysis of variance and the chi-square test were performed to determine whether there was a relationship between the presence of DAC and the underlying neurogenic and non-neurogenic conditions

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
2,309 patients more than 18 years old with neurogenic or non-neurogenic voiding dysfunction who performed urodynamic studies

Inclusion Criteria:

  • Indications and selection of patients for conduction of urodynamic studies (UDS) were followed as the recommendation of ICS (international continence society).

Exclusion Criteria:

  • Patients with indwelling catheters, urinary tract infection and urinary stones were excluded from this study

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01154946

Layout table for location information
Korea, Republic of
Seoul National University Hospital
Seoul, Korea, Republic of, 110-744
Sponsors and Collaborators
Seoul National University Hospital
Layout table for investigator information
Principal Investigator: Seung-June Oh, M.D.,Ph.D. Seoul National University Hospital
Layout table for additonal information
Responsible Party: Seoul National University Hospital Identifier: NCT01154946    
Other Study ID Numbers: DAC
First Posted: July 1, 2010    Key Record Dates
Last Update Posted: July 1, 2010
Last Verified: June 2010
Keywords provided by Seoul National University Hospital:
detrusor after-contraction
urinary bladder, overactive
bladder dysfunction