Clinical trial NCT02294747: Trochanteric Hip Fractures (AO A2) SHS With or Without Trochanteric Stabilizing Plate - Rct Using RSA
Official title: Trochanteric Hip Fractures (AO A2) Treated With Sliding Hip Screw With or Without Trochanteric Stabilizing Plate - a Randomized Controlled Trial Using Radiostereometry.
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hip Fractures
Trochanteric Fractures
Intertrochanteric Fractures
Lead sponsor: Oslo University Hospital
Sponsor class: OTHER
Collaborators: name: Diakonhjemmet Hospital
First posted: 2014-11-19
Enrollment: 31
Sex: ALL
Minimum age (years): 50
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Trochanteric fractures represent about half of the hip fractures (with femoral neck fractures as the other half). Trochanteric hip fractures are almost always treated surgically with internal fixation of the fracture. However there is a debate ongoing for what is the appropriate implant to use. For stable fracture patterns the evidence seems to be in favor of the sliding hip screw, but for the unstable fractures it is more unclear whether to use a intramedullary nail or sliding hip screw with or without a lateral support plate (TSP). The role of the TSP in clinical use remains unclear and very little has been published about this, but it is believed to be an important contributor of stability to the sliding hip screw construct. We are planning a randomized controlled trial on trochanteric hip fractures to establish a method for implanting the tantalum markers, to observe the fracture healing process and to further investigate the role of the TSP.

Detailed description: Trochanteric fractures represent about half of the hip fractures (with femoral neck fractures as the other half), and are almost always treated surgically with internal fixation of the fracture. However, there is an ongoing debate on what is the appropriate implant to use. For stable fracture patterns the evidence seems to be in favour of the sliding hip screw, whereas for the unstable fractures it is unclear whether an intramedullary nail or a sliding hip screw with or without a lateral support plate should be the implant of choice. A series of studies is now planned at Oslo University Hospital in collaboration with Diakonhjemmet Hospital in hope to further clarify this debate. The use of the lateral/trochanteric support plate (TSP) is widespread in some regions (e.g. Norway, Sweden and parts of Britain), but virtually never used other places. The role of the TSP remains unclear and very little has been published on it's use, even though it is believed to be an important contributor of stability to the sliding hip screw construct.

Trochanteric fractures are mainly caused by a direct trauma, i.e mainly a fall from own height in the elderly. The fractures are most often classified using the Müller AO classification or the Evans/Jensen, but several other classification systems also exist. The ideal classification system should be easily applicable, reliable, and aid in treatment decision making.

The treatment of trochanteric fractures comprise perioperative and operative modalities. The perioperative modalities consist among others of medical optimalization preoperatively, early rehabilitation and prevention of new fractures by treating osteoporosis and preventing new falls. The main scope of the current study will, however, be the operative modalities.

Surgery for trochanteric fractures is performed mainly with fracture reduction on a traction table and internal fixation, using either an intramedullary (IM) nail or a sliding hip screw (SHS), both available in various designs from different manufacturers. The latest Cochrane review did not conclude on which implant is the superior. However, among stable fractures there are less reoperations with the SHS, mainly due to peri-implant femoral fractures after operation with an IM nail that. The more unstable fractures, namely the reverse oblique and subtrochanteric fractures, may obtain better results using an intramedullary nail, probably due to less secondary dislocations with resulting varus deformity, shaft-medialization and shortening. The evidence for this is, however, weak and the role of the TSP remains unclear.

Radiostereometry (RSA) is the most precise and accurate method to measure motion in vivo between different segments in orthopaedic research. To do so, radio-opaque tantalum markers are implanted into the bone defining different segments. Stereoradiographs are performed over time to detect movement and monitor the healing (or non healing) process. This movement can be calculated both as translations and rotations. They are ideal to describe and compare the stability of fracture systems. RSA has been used successfully in earlier studies on fracture healing. Due to the high accuracy and precision, RSA yield reliable results with relatively small study-groups. We plan to use RSA to measure fracture dislocation and time to healing in our studies.

The study will be on the function of the trochanteric support plate and it´s ability to prevent secondary dislocation in AO 31 A2 fractures. We will utilize RSA for measurements during follow-up.

Eligibility criteria: Inclusion Criteria:

* AO 31-A2
* able to walk independently, aids such as crutches or walker allowed
* able to consent
* fit for surgery with SHS with or without TSP

Exclusion Criteria:

* not willing or able to attain follow up
* previous fracture or surgery with retained metal work in the same hip
* concomitant disease that will shorten life expectancy

Primary outcomes:
measure: Fracture displacement during healing measured with radiostereometry
timeFrame: 52 weeks
Secondary outcomes:
measure: Perioperative blood loss
timeFrame: 1 week
measure: Time of surgery
timeFrame: 1 week
measure: Eq5d
timeFrame: 52 weeks
measure: Eq5d
timeFrame: 26 weeks
measure: Eq5d
timeFrame: 12 weeks
measure: Eq5d
timeFrame: 8 weeks
measure: Eq5d
timeFrame: 4 weeks
measure: Time to union as measured by RSA (cessation of motion) and radiographs
timeFrame: Will be examined at 4, 8, 12, 26 and 52 weeks
measure: Time to union as measured by plain radiographs and clinical findings
timeFrame: Will be examined at 4, 8, 12, 26 and 52 weeks
measure: Harris Hip Score
timeFrame: 52 weeks
measure: Harris Hip Score
timeFrame: 26 weeks
measure: Harris Hip Score
timeFrame: 12 weeks
measure: Harris Hip Score
timeFrame: 8 weeks
measure: Harris Hip Score
timeFrame: 4 weeks
measure: Postoperative pain (NRS) while in hospital
timeFrame: 1 week
measure: Timed Up and Go (Tug) test
timeFrame: 4 weeks
measure: Timed Up and Go (Tug) test
timeFrame: 8 weeks
measure: Timed Up and Go (Tug) test
timeFrame: 12 weeks
measure: Timed Up and Go (Tug) test
timeFrame: 26 weeks
measure: Timed Up and Go (Tug) test
timeFrame: 52 weeks
measure: Pain (NRS)
timeFrame: 4 weeks
measure: Pain (NRS)
timeFrame: 8 weeks
measure: Pain (NRS)
timeFrame: 12 weeks
measure: Pain (NRS)
timeFrame: 26 weeks
measure: Pain (NRS)
timeFrame: 52 weeks
measure: Satisfaction with operated hip (NRS)
timeFrame: 4 weeks
measure: Satisfaction with operated hip (NRS)
timeFrame: 8 weeks
measure: Satisfaction with operated hip (NRS)
timeFrame: 12 weeks
measure: Satisfaction with operated hip (NRS)
timeFrame: 26 weeks
measure: Satisfaction with operated hip (NRS)
timeFrame: 52 weeks
measure: Motion during healing as measured by radiostereometry.
timeFrame: 52 weeks
measure: Motion during healing as measured by plain radiographs.,
timeFrame: 52 weeks
Other outcomes:
measure: Reoperation for healing problems
timeFrame: 52 weeks
measure: Mortality
timeFrame: 52 weeks
Locations:
city: Oslo
country: Norway
facility: Orthopedic Center, Ulleval University Hospital
city: Oslo
country: Norway
facility: Diakonhjemmet Hospital
Study officials:
affiliation: Oslo University Hospital
name: Frede Frihagen, PhD
role: PRINCIPAL_INVESTIGATOR
References: