The meta- analysis of the current evidence base showed that minimally invasive THA is associated with a significantly increased risk of transient lateral femoral cutaneous nerve palsy ( p = 0.006 ) with no significantly better outcome
Over the past decade , minimally invasive surgery has gained popularity as a means of optimising early postoperative rehabilitation and increasing patient satisfaction and cosmesis following  total hip arthroplasty ( THA ) .
However , this surgical exposure has also been associated with increased risk of iatrogenic nerve injury and implant mal-positioning due to limited visibility compared to conventionally larger surgical incisions .
The purpose of this meta- analysis was to compare the outcomes of these two surgical exposures .
Comparison of early postoperative functional levels following total hip replacement using minimally invasive versus standard incisions. A prospective randomized blinded trial
Objective : To compare the results of single-incision minimally invasive total hip replacement ( ≤ 10 cm ) to st and ard-incision ( 16 cm ) total hip replacement in the early postoperative period with respect to functional and mobilizing ability ( transfers , mobilizing , walking and stair assessment ) . Setting : Orthopaedic wards of a regional orthopaedic centre . Subjects : Two hundred and nineteen total hip replacement patients were tested between December 2003 and June 2004 . Interventions : Patients were r and omized to either total hip replacement through a minimally invasive ( ≤ 10 cm ) or st and ard incision ( 16 cm ) . A single surgeon performed all procedures using the same type of component fixation . Postoperative physiotherapy assessment and treatment was st and ardized . Analgesia was also st and ardized . All patients , physiotherapy staff and assessors were blinded to the incision used . Main outcome measures : Patients were tested two days post operatively and were assessed for the following activities : transfer from supine to sit , transfer from sitting to st and ing , mobilizing , ascending and descending stairs and weight-bearing . Results : The shorter incision offered no significant improvement in patient ability in relation to transfer from lying to sitting , transfer from sitting to st and ing , mobilizing or weight-bearing . Ascending/descending stairs gave a total time for the minimal incision of 38.7 s against 40.8 s for a st and ard incision . There was no difference in walking velocity between the st and ard incision and minimal incision groups two days post operatively ( minimal incision = 0.26 m/s versus st and ard incision = 0.26 m/s ) or six weeks post operatively ( minimal incision = 0.90 m/s versus st and ard incision = 0.93 m/s ) . There was no difference between groups with respect to walking aids at six-week review . The mean length of stay for the minimally invasive approach was 3.65 days ( SD 2.04 ) against 3.68 days ( SD 2.45 ) for the st and ard approach . This was not significantly different . Conclusion : Total hip replacement performed through a minimally invasive incision of ≤ 10 cm compared with a st and ard incision of 16 cm offers no significant benefit in terms of the rate or ability of patients to mobilize and perform functional tasks necessary for safe discharge
The meta- analysis of the current evidence base showed that minimally invasive THA is associated with a significantly increased risk of transient lateral femoral cutaneous nerve palsy ( p = 0.006 ) with no significantly better outcome
Over the past decade , minimally invasive surgery has gained popularity as a means of optimising early postoperative rehabilitation and increasing patient satisfaction and cosmesis following  total hip arthroplasty ( THA ) .
However , this surgical exposure has also been associated with increased risk of iatrogenic nerve injury and implant mal-positioning due to limited visibility compared to conventionally larger surgical incisions .
The purpose of this meta- analysis was to compare the outcomes of these two surgical exposures .