DOS 2017

DOS Kongressen 2017 ·

145

Good mid-term results after hip arthroscopy: a retro-

spective study of 84 patients with femoroacetabular

impingement followed for a minimum of 6 year

Niels Christian Kaldau, Stig Brorson, Bent Lund

Orthopedic, Aleris-Hamlet Hospital; Orthopedic, Herlev Hospital; Orthopedic

Background:

Short-term outcome after hip arthroscopy for femoroacetabular

impingement (FAI) have been reported to be successful. However, mid-term

and long-term outcome are sparsely reported.

Purpose / Aim of Study:

To report the mid-term patient-reported outcome

in a consecutive cohort and to investigate the relationship between cartilage

lesions and the conversion rate to total hip arthroplasty (THA).

Materials and Methods:

Eighty-four FAI patients with a joint space width of

> 3 mm operated by the senior author were retrospectively followed for 6–8

years. The conversion rate to THA, the peri- operative findings and the patient-

reported outcome (HAGOS, HSAS, and EQ5D) were assessed

Findings / Results:

Fifteen out of 84 (18 %) patients were converted to THA.

The 5-year cumulative conversion rate was 17,1 % (CI: 8.5 %; 24.9 %). The

THA group was significantly older (p=0.021), with a mean age of 46.7 years

(95% CI: 42.8; 50.6) compared to 39.7 years (95% CI: 36.9; 42.4) in the non-

conversion group. In the THA group 13 out of 15 patients were 40 years or

older (p=0.009). A high-grade acetabular cartilage lesion was associated with a

higher risk of conversion to THA. Thirteen out of 15 with Beck grade 3–4 were

converted (p=0.015). No significant associations were observed between the

peri-operative findings and PROMs in the non-conversion group. Sixty- four

patients out of 69 (93 %) were willing to have the arthroscopy performed again.

Conclusions:

The mid-term results of arthroscopic hip- preserving surgery

show conversion rates to THA of 18 %, high patient satisfaction and good func-

tional outcome. High-grade cartilage lesions and an age of 40 years and older

are risk factors for conversion to THA.

No conflicts of interest reported

97.