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Efficacy of Hybrid Systems in Comparison to the Rigid Spondylodesis in Lumbar-spine Fusion (D-Rod)

Primary Purpose

Spondylolisthesis

Status
Terminated
Phase
Not Applicable
Locations
Germany
Study Type
Interventional
Intervention
Experimental: hybrid system
Active Comparator: Plif
Sponsored by
University of Cologne
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Spondylolisthesis focused on measuring degenerative disc disease, spondylolisthesis, Lumbar spine, fusion, adjacent instability

Eligibility Criteria

30 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Key- Inclusion Criteria:

  1. Male or female >30 years of age
  2. Lumbar spine pathology with indication for monosegmental PLIF
  3. Radiological signs of a degeneration of the adjacent segment without instability

Key Exclusion Criteria:

  1. Radiological signs of existing instability of the adjacent segment
  2. Normal endplates and no disc desiccation in MRI in the adjacent seg-ment
  3. Previous surgery of the lumbar spine

Sites / Locations

  • University hospital, Department of orthopedics & traumasurgery
  • University hospital, Department of orthopedics

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Active Comparator

Arm Label

hybrid system

Plif posterior lumbar intervertebral fusion

Arm Description

hybrid system (PLIF + flexible pedicle screw system above the fusion) (Dynamic Rod®: AESCULAP AG, Tuttlingen: Germany

Conventional monosegmental posterior lumbar intervertebral fusion (PLIF) (Fixateur: S4®: AESCULAP AG, Cage: Wave® Cage, Fa. AMT®)

Outcomes

Primary Outcome Measures

Oswestry Disability Index
ODI (cross-cultural adaption of the ODI version 2.1 for use with German-speaking patients) - this is one of the condition-specific questionnaires recommended for use with back pain patients. The ODI is a standardized, patient-completed questionnaire which gives a subjective percentage score of level of function (disability) in activities of daily living for those rehabilitating from low back pain. The questionnaire examines perceived level of disability in 10 everyday activities of daily living

Secondary Outcome Measures

SF-36
The baseline and follow-up values after 6 weeks after the operation as well as 6 ,12,24,36 months after baseline of the SF-36 (Short-Form-36)-Measured Outcome regarding the Physical Component Summary (PCS). The baseline and follow-up values after 6 weeks after the operation as well as 6 and 12 months after baseline of the SF-36 (Short-Form-36)-Measured Outcome regarding the Physical Component Summary (PCS).
Mental Component Summary (MCS) and individual dimensions and subscales of the Mental Component Summary (MCS) and individual dimensions and subscales of SF-36
Mental Component Summary (MCS) and individual dimensions and subscales of the SF-36 follow-up values after 6 weeks after the operation as well as 6, 12,24 and 36 months after baseline
COMI questionnaire (version 2008)-
COMI questionnaire (version 2008)- a patient-oriented, short, multidimensional outcome instrument validated for patients with spinal disorders

Full Information

First Posted
May 8, 2013
Last Updated
September 15, 2015
Sponsor
University of Cologne
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1. Study Identification

Unique Protocol Identification Number
NCT01852526
Brief Title
Efficacy of Hybrid Systems in Comparison to the Rigid Spondylodesis in Lumbar-spine Fusion
Acronym
D-Rod
Official Title
Clinical Trial (Phase II, Therapeutic Explorative) of the Efficacy of Hybrid Systems in Comparison to the Rigid Spondylodesis in Fusion-surgery in the Lumbar Spine: a Prospective, Randomised, Monocenter Pilotstudy
Study Type
Interventional

2. Study Status

Record Verification Date
September 2015
Overall Recruitment Status
Terminated
Why Stopped
device failure
Study Start Date
March 2013 (undefined)
Primary Completion Date
February 2017 (Anticipated)
Study Completion Date
July 2017 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
University of Cologne

4. Oversight

Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This study is designed as a randomized, parallel-group, therapy-controlled trial in a clinical care setting at a university hospital. Patients presenting to our outpatient clinic with degenerative disc disease or spondylolisthesis will be assessed against study inclusion and exclusion criteria. After informed consent and randomization of patients, surgery will be performed. Follow-up examinations will take place immediately after treatment during hospital stay, and then after another 6 and 24 weeks, for a total study duration of 6 months. Data will be assessed after 12, 24 and 36 months for a supplemental investigation. A further assessment will be performed every year, owing to the possibility that a statement regarding ASD cannot be given after 36 months. Experimental research in this trial will be performed with the approval of the ethics committee of the medical faculty of the University of Cologne and of the university of Halle.
Detailed Description
Patients over 30 years of age presenting to our outpatient clinic with degenerative disc disease or spondylolisthesis and indications for monosegmental lumbar spine fusion are eligible for trial inclusion. Indication for the fusion procedure will not be stated earlier than after 6 months of conservative therapy. Patients with spondylolisthesis have to respond positively to facet joint injection. Radiologic inclusion criteria are summarized in the appendix. Prerequisite to inclusion is the presence of radiologic degeneration of the adjacent segment (Pfirrmann grades II-IV in MRI findings) without signs of instability. Definition of radiologic and clinical instability as well as further inclusion criteria are summarized in the appendix. Study subjects will be approached and recruited by experienced spine surgeons. A number of 150 patients per year, who undergo primary monosegmental fusion in the department, is estimated for the screening procedure. A recruitment rate of 30 patients per year is anticipated. Patients will receive one of two treatments: Conventional monosegmental posterior lumbar intervertebral fusion (PLIF) Hybrid system (PLIF + flexible pedicle screw system above the fusion) Control group - conventional PLIF The control group will receive a monosegmental posterior lumbar spine fusion with an intervertebral cage (PLIF). This is the current well-established therapy for several pathologies of the lumbar spine (e.g. spondylolisthesis, degenerative disc disease). Thus, the control group will receive the standard of care. This is the only acceptable control/comparison in a trial of this kind. Surgery will be performed using the following devices: S4® AESCULAP AG, Cage: Wave® Cage, Fa. AMT® Intervention group - hybrid system The intervention group will receive a hybrid system with PLIF and a flexible pedicle screw system above the fusion. Surgery will be performed using the following devices: S4® Dynamic rod: AESCULAP AG (Tuttlingen) Only skilled spine surgeons (experience of at least 30 fusion-procedures) will participate in the trial. Intraoperative photo documentation will help preventing variations of the procedure (e.g. enlargement of decompression/approach). We will also provide an instructional movie on the standards of the procedures and the rating of the x-rays. All patients will receive a surgical drain, to be removed 2 days post-surgery. Both groups of patients will receive physical therapy, beginning on the day after surgery. Patients will be discharged only after sufficient convalescence with unremarkable wound healing. Hospital admission lasting 8-10 days will be necessary. Physical therapy will be performed during the inpatient period. After hospital discharge, physical therapy will be continued under outpatient conditions. This therapy will not be standardized in order to reflect reality. Adverse and Serious Adverse Events Adverse Event An Adverse Event is any untoward medical occurrence in a study patient that may or may not have a causal relationship with the study treatment. Abnormal laboratory test values will be recorded as AE only if they require treatment. Concomitant Diseases In this context, deterioration of a pre-existing disease is also to be regarded as an Adverse Event. But it will not be regarded as an Adverse Event if it is due to a treatment that was already planned before the patient was enrolled in the study. Pregnancy In this study, the occurrence of pregnancy is considered as an Adverse Event. Before surgery, laboratory tests will be conducted to exclude pregnancy in women below 50 years of age. Laboratory Test Values Any abnormal laboratory test values during the study will be checked for plausibility and evaluated for clinical relevance by the responsible investigator. If during the study, an abnormal test value is found that, in the baseline visit, was not considered to be clinically relevant, but is now considered to be clinically relevant, it must be recorded as an AE in the eCRF. Serious Adverse Event The present clinical study is not subject to the Sections 20-23a of the German Medical Product Law (Medizinproduktgesetz - MPG), but its definitions will apply here. A Serious Adverse Event is any untoward occurrence in a clinical trial or in a performance evaluation text subject to approval that directly or indirectly leads to death; or have led, could have led, or could lead to a serious deterioration in the state of health of a study subject, of a user or of another person, irrespective of whether the occurrence has been caused by the medical product. This definition of a SAE will serve as basis for the documentation of Serious Adverse Events during the study. . Ascertainment of AE and SAE The study centre concerned is responsible for recording and reporting AEs and SAEs. The study director/main investigator will ensure that all persons involved in the treatment of the study patients are fully aware of their responsibilities in the event of Adverse Events. At each visit, the patients will be asked if they have experienced any Adverse/Serious Events. The Adverse Events will be recorded both in the patients' medical record and in the survey questionnaires. At each visit, the physician will review the patients' medical records to determine whether Adverse Events have occurred. If an Adverse Event occurs, the patient in question, irrespective of the causal relationship between the Adverse Event and the study treatment, must be kept under constant supervision. In any case, the patient must remain under observation until the symptoms have subsided, or the laboratory test values have returned to acceptable levels, or a plausible explanation has been found for the Adverse Event, or until the patient has died, or has been discharged from the study (last visit after 6 months or 36 months). All Adverse Events will be recorded in the CFR, including the following information: Time and date of start and end Gravity Relationship to the study therapy Serious or not serious Expected or not expected

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Spondylolisthesis
Keywords
degenerative disc disease, spondylolisthesis, Lumbar spine, fusion, adjacent instability

7. Study Design

Primary Purpose
Treatment
Study Phase
Not Applicable
Interventional Study Model
Parallel Assignment
Masking
None (Open Label)
Allocation
Randomized
Enrollment
5 (Actual)

8. Arms, Groups, and Interventions

Arm Title
hybrid system
Arm Type
Experimental
Arm Description
hybrid system (PLIF + flexible pedicle screw system above the fusion) (Dynamic Rod®: AESCULAP AG, Tuttlingen: Germany
Arm Title
Plif posterior lumbar intervertebral fusion
Arm Type
Active Comparator
Arm Description
Conventional monosegmental posterior lumbar intervertebral fusion (PLIF) (Fixateur: S4®: AESCULAP AG, Cage: Wave® Cage, Fa. AMT®)
Intervention Type
Device
Intervention Name(s)
Experimental: hybrid system
Other Intervention Name(s)
D-Rod
Intervention Description
The intervention group will receive a hybrid system with PLIF and a flexible pedicle screw system above the fusion. Surgery will be performed using the following devices (Dynamic Rod® Hersteller: AESCULAP AG, Tuttlingen
Intervention Type
Device
Intervention Name(s)
Active Comparator: Plif
Other Intervention Name(s)
S4® AESCULAP AG, Cage: Wave® Cage, Fa. AMT®
Intervention Description
monosegmental PLIF
Primary Outcome Measure Information:
Title
Oswestry Disability Index
Description
ODI (cross-cultural adaption of the ODI version 2.1 for use with German-speaking patients) - this is one of the condition-specific questionnaires recommended for use with back pain patients. The ODI is a standardized, patient-completed questionnaire which gives a subjective percentage score of level of function (disability) in activities of daily living for those rehabilitating from low back pain. The questionnaire examines perceived level of disability in 10 everyday activities of daily living
Time Frame
6 month
Secondary Outcome Measure Information:
Title
SF-36
Description
The baseline and follow-up values after 6 weeks after the operation as well as 6 ,12,24,36 months after baseline of the SF-36 (Short-Form-36)-Measured Outcome regarding the Physical Component Summary (PCS). The baseline and follow-up values after 6 weeks after the operation as well as 6 and 12 months after baseline of the SF-36 (Short-Form-36)-Measured Outcome regarding the Physical Component Summary (PCS).
Time Frame
6 weeks and 6 ,12,24,36 months
Title
Mental Component Summary (MCS) and individual dimensions and subscales of the Mental Component Summary (MCS) and individual dimensions and subscales of SF-36
Description
Mental Component Summary (MCS) and individual dimensions and subscales of the SF-36 follow-up values after 6 weeks after the operation as well as 6, 12,24 and 36 months after baseline
Time Frame
6 weeks,6, 12,24 and 36 months after baseline
Title
COMI questionnaire (version 2008)-
Description
COMI questionnaire (version 2008)- a patient-oriented, short, multidimensional outcome instrument validated for patients with spinal disorders
Time Frame
6 weeks, 6, 12, 24, 36 month after baseline

10. Eligibility

Sex
All
Minimum Age & Unit of Time
30 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Key- Inclusion Criteria: Male or female >30 years of age Lumbar spine pathology with indication for monosegmental PLIF Radiological signs of a degeneration of the adjacent segment without instability Key Exclusion Criteria: Radiological signs of existing instability of the adjacent segment Normal endplates and no disc desiccation in MRI in the adjacent seg-ment Previous surgery of the lumbar spine
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Jan Siewe, Dr.
Organizational Affiliation
University Hospital of Cologne
Official's Role
Principal Investigator
Facility Information:
Facility Name
University hospital, Department of orthopedics & traumasurgery
City
Cologne
State/Province
NRW
ZIP/Postal Code
50924
Country
Germany
Facility Name
University hospital, Department of orthopedics
City
Halle
State/Province
Sachsen-Anhalt
ZIP/Postal Code
06112
Country
Germany

12. IPD Sharing Statement

Citations:
PubMed Identifier
25189113
Citation
Siewe J, Bredow J, Oppermann J, Koy T, Delank S, Knoell P, Eysel P, Sobottke R, Zarghooni K, Rollinghoff M. Evaluation of efficacy of a new hybrid fusion device: a randomized, two-centre controlled trial. BMC Musculoskelet Disord. 2014 Sep 5;15:294. doi: 10.1186/1471-2474-15-294.
Results Reference
derived
Links:
URL
http://orthopaedie-unfallchirurgie.uk-koeln.de/
Description
Related Info

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Efficacy of Hybrid Systems in Comparison to the Rigid Spondylodesis in Lumbar-spine Fusion

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