Clinical trial NCT00284622: HTO With and Without Arthroscopy
Official title: A Randomized Clinical Trial to Compare the Effectiveness of High Tibial Osteotomy With or Without Arthroscopy of the Knee Joint on Quality of Life, Functional Ability and Pain for Patients With Medical Compartment Osteoarthritis of the Knee
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: PHASE2
Conditions: Medial Compartment Osteoarthritis of the Knee
Keywords: HTO
Arthroscopy
Osteoarthritis
Alignement
Varus gonarthrosis
Lead sponsor: Fowler Kennedy Sport Medicine Clinic
Sponsor class: OTHER
First posted: 2006-02-01
Enrollment: 98
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: FACTORIAL
Primary purpose: TREATMENT

Brief summary: It remains unknown if a concomitant arthroscopic knee debridement would increase the benefits of surgery (quality of life and functional ability) for young active patients with medial compartment OA of the knee and varus alignmen. This additional procedure has a low incidence of morbidity and would potentially allow for treatment of meniscal tears and articular damage, as well as joint lavage to remove debris and inflammatory factors. A trial is needed to determine whether HTO with concomitant knee arthroscopy will result in better overall outcomes for this patient group.The objective is to compare the quality of life, functional status, pain, and swelling of patients who undergo an HTO with or without a concomitant knee joint arthroscopy to address additional joint pathology

Detailed description: Arthroscopy for degenerative conditions of the knee is among the most widely employed orthopaedic procedures, but its effectiveness (like the effectiveness of many surgical operations) has never been proven in prospective trials. The evidence supporting the use of arthroscopy in treatment algorithms for knee OA comes largely from case series and cohort studies. These studies have shown that about 50% of patients report pain relief following the procedure. Predictors of poor outcome following arthroscopy include marked mal-alignment, restricted range of motion, advanced radiographic changes, and prior surgery. Improved outcomes are predicted by preoperative mechanical symptoms caused by loose bodies, meniscal tears, or radiographic evidence of mild articular degeneration.

The proposed study is a randomized clinical trial.

Each patient will undergo a preoperative MRI of their affected knee joint to identify existing pathology (e.g. meniscal tears, loose bodies, chondral flaps). The results of the MRI will not be revealed to physicians, patients or data collectors. This will ensure that we have information on the existing joint pathology within each group and that prognostic variables between groups were sufficiently balanced (i.e. comparable rates of similar pathology per group). The primary outcome measure is self-reported quality of life (WOMAC). Secondary measures include self-reported functional ability (LEFS), swelling, pain and frequency of analgesic use (patient diary), and general health (SF-36). Assessments will take place preoperatively and at 3, 6 and 12 months postoperatively.

Eligibility criteria: Inclusion Criteria:

* patients with medial compartment osteoarthritis as determined by clinical examination and plain radiographs.
* scheduled for an HTO

Exclusion Criteria:

1. Evidence of other significant knee pathology,
2. Active joint or systemic infection,
3. Major medical illness that would preclude undergoing surgery,
4. Patients who are unwilling or unable to be assessed according to study protocol for one year following surgery
5. Major psychiatric illness, developmental handicap or inability to read and understand the English language

Primary outcomes:
measure: self-reported quality of life (WOMAC).
timeFrame: 2 years
Secondary outcomes:
measure: self-reported functional ability (LEFS),
timeFrame: 2 years
measure: swelling
timeFrame: 2 years
measure: pain
timeFrame: 2 yrs
measure: frequency of analgesic use (patient diary),
timeFrame: 3 mths
measure: general health (SF-36).
timeFrame: 2 yrs
Other outcomes:
Locations:
city: London
country: Canada
facility: Fowler Kennedy Sport Medicine Clinic
state: Ontario
Study officials:
affiliation: Fowler Kennedy Sport Medicine Clinic
name: J. Robert Giffin, MD, FRCSC
role: PRINCIPAL_INVESTIGATOR
References: