In Vivo Arthroscopic Behavior of the Infrapatellar Plica of the Knee
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|ClinicalTrials.gov Identifier: NCT00643487|
Recruitment Status : Completed
First Posted : March 26, 2008
Results First Posted : May 18, 2016
Last Update Posted : April 24, 2018
|Condition or disease||Intervention/treatment|
|Anterior Knee Pain Syndrome||Procedure: observation of the behavior of the infrapatellar plica|
The infrapatellar plica (IPP) of the human knee is vestigial remnant of the embryologic division between the medial and lateral compartments of the knee, present in 85.5% of knees1, felt by some to be of no clinical significance other than acting as a block to visualization an movement during arthroscopy.2 S.J. Kim 3,4, C.R. Boyd 5, and B. Demirag 2006 have documented successful relier of anterior knee pain after resection of the IPP. This study seeks to assess the relationship between knee motion, activation of the extensor apparatus, and the IPP, in essence, the kinematics of the contents of the anterior compartment of the knee. The hypothesis to be evaluated is:
the infrapatellar plica is a structure of fundamental biomechanical significance, allowing the transmission of force from the extensor apparatus to the distal femur through the fat pad, and acting as a restraint and a modulator of fad pad mobility.
Subjects will be identified by the PI at their office visit. The subject will be consented. The consent will be discussed and verified in a second office visit before surgery. The subject will undergo arthroscopy specifically directed toward identifying and treating known pathology. Once this is finished, if an IPP is present, it will be injected with radiographic contrast material. A series of maneuvers will be performed involving passive and active motion of the knee and active contraction of the quadriceps apparatus. Videotape recording and fluoroscopy will be undertaken. The plica will be removed. Another fluoroscopy will be performed. The patient will be followed according to the standard practice for arthroscopy and the defined pathology.
|Study Type :||Observational|
|Actual Enrollment :||8 participants|
|Official Title:||In Vivo Arthroscopic Behavior of the Infrapatellar Plica of the Knee|
|Study Start Date :||February 2006|
|Actual Primary Completion Date :||January 2013|
|Actual Study Completion Date :||January 2013|
observation of the behavior of the infrapatellar plica
Procedure: observation of the behavior of the infrapatellar plica
Local anesthesia using bupivicaine will be initiated. The IPP, if present will be injected with contrast material. In order to minimize discomfort, lidocaine 1%, in as small a volume as possible, will be injected into the fat pad under direct vision to avoid any intra-articular damage from the #25 needle. Radiographic visualization will be verified and the knee taken through a full range of passive and active exercises. Active quadriceps contraction in the subject will be performed at 0, 15, 30 60 and 90 degrees of flexion. In so far as is technically possible, the behavior of the IPP will be videotaped and recorded on lateral fluoroscopy.
Other Name: Knee surgery
- Number of Participants With Successful Recording. [ Time Frame: During procedure, on average one hour. ]Observe the behavior of the IPP of the knee by fluoroscopy. A complete recording was obtained in 2 patients: this implied that the plica,central body, and fat pad were visualized. The patients then completed a series of manouevres which demonstrated the mechanical behavior of the infrapatellar plica-fat pad complex.
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 ClinicalTrials.gov identifier (NCT number): NCT00643487
|United States, New York|
|SUNY Upstate Medical University|
|Syracuse, New York, United States, 13202|
|Principal Investigator:||Thomas V Smallman, MD||State University of New York - Upstate Medical University|