Trial document





This trial has been registered retrospectively.
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  DRKS00011274

Trial Description

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Title

Influencing factors of pelvic lift during cup insertion in total hip arthroplasty in supine position

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Trial Acronym

[---]*

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URL of the Trial

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Brief Summary in Lay Language

Movement of the pelvis during implantation of a total hip arthroplasty (THA) has a major influence on the positioning of the acetabular cup. Strong traction caused by retractors leads to iatrogenic pelvic lift and can thus be partly responsible for cup malpositioning. The objective of this study was to investigate such factors that influence pelvic lift.

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Brief Summary in Scientific Language

Movement of the pelvis during implantation of a total hip arthroplasty (THA) has a major influence on the positioning of the acetabular cup. Strong traction caused by retractors leads to iatrogenic pelvic lift and can thus be partly responsible for cup malpositioning. The objective of this study was to investigate such factors that influence pelvic lift.
Methods: The dynamic movement of the pelvis was measured during implantation of a THA in 67 patients. This was done by measuring the acceleration using the SensorLog app on a smartphone.
Results: At its maximum, the pelvis was lifted by an average of 6.7°. When impacting the press-fit cup, the surgical side was raised by 4.4° compared with the time of skin incision. This lift at the time of cup implantation correlates significantly with the BMI and the patient's abdominal and pelvic circumference.
Conclusions: Every surgeon performing THA must be aware of the pelvic lift during an operation. Especially in patients with a high BMI, a large abdominal or large pelvic circumference, there is an increased risk of malpositioning of the acetabular cup. When impacting the cup, we recommend releasing the traction of the retractor, so that the pelvis can tilt back into its natural position and thus the anticipated cup positioning can be implemented as exactly as possible

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Organizational Data

  •   DRKS00011274
  •   2016/11/29
  •   [---]*
  •   yes
  •   Approved
  •   4440-04/15, Ethikkommission der Friedrich-Schiller-Universität Jena an der Medizinischen Fakultät
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Secondary IDs

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Health Condition or Problem studied

  •   M16.1 -  Other primary coxarthrosis
  •   M16.3 -  Other dysplastic coxarthrosis
  •   M16.7 -  Other secondary coxarthrosis
  •   implantation of a total hip arthroplasty
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Interventions/Observational Groups

  •   The dynamic movement of the pelvis was measured during implantation of a THA in 67 patients. This was done by measuring the acceleration using the SensorLog app on a smartphone.
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Characteristics

  •   Non-interventional
  •   Other
  •   Single arm study
  •   Open (masking not used)
  •   [---]*
  •   Uncontrolled/Single arm
  •   Other
  •   Single (group)
  •   N/A
  •   N/A
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Primary Outcome

Intraoperative measurement of pelvic lift during implantation of the cup while primary THA (total hip arthroplasty) by measuring the acceleration using the SensorLog app on a smartphone

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Secondary Outcome

weight, height, BMI, circumference of waste and hip, waste/hip ratio of included patients, indication, age, gender, duration of surgery, used implants

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Countries of Recruitment

  •   Germany
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Locations of Recruitment

  • University Medical Center 
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Recruitment

  •   Actual
  •   2015/06/15
  •   80
  •   Monocenter trial
  •   National
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Inclusion Criteria

  •   Both, male and female
  •   no minimum age
  •   no maximum age
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Additional Inclusion Criteria

Coxarthrosis with the indication for primary THA

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Exclusion Criteria

posttraumatic coxarthrosis,
surgical intervention performed on ipsilateral hip joint

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Addresses

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    • Waldkrankenhaus "Rudolf Elle" GmbH
    • Klosterlausnitzer Straße 81
    • 07607  Eisenberg
    • Germany
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    •   036691 8-0
    •   036691 8-1125
    •   [---]*
    •   [---]*
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    • Waldkrankenhaus "Rudolf Elle" GmbH
    • Mr.  Doktor  Steffen  Brodt 
    • Klosterlausnitzer Straße 81
    • 07607  Eisenberg
    • Germany
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    • Waldkrankenhaus "Rudolf Elle" GmbH
    • Mr.  Doktor  Steffen  Brodt 
    • Klosterlausnitzer Straße 81
    • 07607  Eisenberg
    • Germany
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Sources of Monetary or Material Support

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    • Universitätsklinikum Jena, Campus EisenbergLehrstuhl für Orthopädie
    • Mr.  Professor  Georg  Matziolis 
    • Klosterlausnitzer Straße 81
    • 07607  Eisenberg
    • Germany
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Status

  •   Recruiting complete, follow-up complete
  •   2016/02/16
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Trial Publications, Results and other Documents

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* This entry means the parameter is not applicable or has not been set.