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CompletedNCT01495143Updated Sep 15, 2014

Surgical Stress Measured by Microdialysis

An interventional study of Posterolateral lumbar fusion surgery in Trauma, sponsored by Northern Orthopaedic Division, Denmark. Completed. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-09-15.

Sponsored by Northern Orthopaedic Division, Denmark · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
16
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

Paraspinal muscle damage is inevitable during conventional posterior lumbar fusion surgery. Minimal invasive surgery is postulated to result in less muscle damage and better outcome. The aim of this study is to monitor metabolic changes of the paraspinal muscle and to evaluate paraspinal muscle damage during surgery using microdialysis (MD).

Read the detailed description

Posterior approach is a common and important surgical procedure for various lumbar diseases. Owing to the anatomy, the damage of paraspinal muscle is inevitable during conventional posterior lumbar fusion surgery. Degeneration and malfunction of the paraspinal muscle might associate with pain and inferior postoperative clinical outcome.

02

Conditions studied

  • Trauma

Keywords

  • Glucose
  • Lactate pyruvate ratio
  • Glycerol
  • Paraspinal muscle
  • Microdialysis
03

In context

Lead sponsor

Northern Orthopaedic Division, Denmark is the lead sponsor of 61 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • patients who undergo conventional instrumented posterolateral lumbar fusion.

Exclusion criteria

Exclusion criteria:

  • previous fusion
  • chronic metabolic disease
  • tumor or metastasis
  • postoperative surgical complications and complications during surgery
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
16 participants (actual)

Study arms

  • Active comparator
    Healthy group

    Eight healthy volunteers (five males and three females) with a body mass index of 23.8 and without chronic metabolic disease or low back pain. They are all non-smokers and non-medicated.

    Procedure: Posterolateral lumbar fusion surgery

  • Experimental
    Surgery group

    Two MD catheters is placed in the paraspinal muscle at the level of midpoint of incision bilaterally. A reference catheter is placed in the deltoid muscle.

    Procedure: Posterolateral lumbar fusion surgery

Interventions

  • ProcedurePosterolateral lumbar fusion surgery

    Two MD catheters with 1% lidocaine 1-2 ml are placed in the paraspinal muscle.

    Also known as: Lumbar diseases

06

What researchers measure

Primary outcomes

  1. The glycerol concentration

    To study whether the glucerol concentration can be used to evaluate surgery related paraspinal muscle damage

    Time frame: Two hours

07

Study locations

No study locations are listed for this record.

08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 15, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01495143
Lead sponsor
Northern Orthopaedic Division, Denmark
Responsible party
Sponsor
First posted
Dec 19, 2011
Start date
Jan 2007
Primary completion
Dec 2007
Completion
Jun 2008
Last update
Sep 15, 2014

Study contacts

Gang Ren, MD, PhD
principal investigator · Orthopaedic Division, North Denmark Region, Aalborg University Hospital, Denmark

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2014. You cannot join it, but the record below documents what was studied.

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