Knee Aspiration
Conditions
Brief summary
The purpose of this study is: * To determine the accuracy of intraarticular placement with the transpatellar tendon approach as compared to the suprapatellar approach. Patients undergoing knee arthroscopy will be consented for study of the injection of the fluid into the joint prior to portal placement or commencement of knee replacement. Patients will be randomized to receive injections via the transpatellar tendon or superolateral approach. Using injectable contrast and fluoroscopy, the placement of injections into the knee will be evaluated for accuracy. Injection attempts with contrast fluid that uniformly coats the articular surface on sagittal and coronal radiographs will be counted as successful. A concentration of contrast fluid in extraarticular fat will be counted as a failure. Hypothesis: The rate of accuracy of intraarticular placement of the needle tip via the transpatellar tendon approach to knee aspiration is greater than that of the superolateral approach. * To determine the distribution of contrast material with the transpatellar tendon and superolateral apporaches. Using a previously described evaluation technique of dividing the knee into seven compartments, sagittal and coronal fluoroscopy images will be evaluated to determine the distribution of contrast fluid. Hypothesis: Contrast injected into the knee via the trasnpatellar tendon approach will penetrate as many compartments of the knee as contrast injected via the superolateral approach.
Interventions
PROCEDURETranspatellar Approach
The transpateller approach for the injection of the dye will be used.
PROCEDURESuprapatellar
The suprapatellar approach will be used for the injection of the dye.
Sponsors
Denver Health and Hospital Authority
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
* undergoing elective arthroscopic surgery of the knee * age greater than 18 years old and less than 80 years old * able to consent to a research study
Exclusion criteria
* allergy to contrast dye, iodine or shellfish * currently pregnant * acute fracture or dislocation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The development of an easier approach to aspirating the knee may lead to improved accuracy of intraarticular needle placement by less experienced practitioners and more anatomically difficult knees. | 1 time (intraop) |
Countries
United States
Outcome results
None listed