ClinicalTrials.gg
CompletedNCT03315481Updated Oct 20, 2017

Ultrasound Guided Repositioning of a New Suture-Method Catheter for Adductor Canal Block

An interventional study of SAX catheter insertion and LAX catheter insertion in Anesthesia, Pain, Postoperative and Pain, sponsored by Nordsjaellands Hospital. Completed at 1 site in Denmark. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-10-20.

Sponsored by Nordsjaellands Hospital · Not applicable, Interventional, and Device feasibility

Phase
Not applicable
Study type
Interventional
Enrollment
12
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 180 studies in Pain, Postoperative with a site in Denmark — 8 open to participants now, 9 under way, 2 of them phase 3. Pain, Postoperative · Denmark.

Enrollment
121st of 129
12 · median 72
Started
2017
with 11 others
No phase
36 of 180
2 open now
Registered
109th of 180
by date
Lead sponsor
8 of 180
Nordsjaellands Hospital

Among the 180 studies in Pain, Postoperative with a site in Denmark, this one is the 121st largest by enrollment of the 129 interventional ones that give a count, is one of 12 that started in 2017, is one of 36 with no phase, and was the 109th registered.

Pain, Postoperative

5,644 studies on the registry are indexed under Pain, Postoperative; 1,229 are open to participants now.

Browse Pain, Postoperative studies →

Open to participants now

8 of the 180 studies in Pain, Postoperative with a site in Denmark are open now. Recruiting first, the newest first:

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All 8 open studies →

A study can be open while its sites in Denmark have not opened yet or have stopped. Only those recruiting at a site in Denmark →

Who these studies take

Of the 678 Pain, Postoperative studies recruiting now, 241 (36%) set no upper age limit and 328 (48%) stop at 75 or younger; 74 take children under 18; 128 take healthy volunteers.

This study: 18 Years and older · all sexes · healthy volunteers too.

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02

Study summary

This is a randomized clinical trial in healthy volunteers. 12 volunteers will have suture-method catheters placed in the adductor canal of each leg using the long-axis plane and short-axis plane technique. The investigators will inject LA in both catheters to confirm correct position. Following return of cold sensation the catheter is then displaced intentionally. The orifice is identified by injection of isotonic saline to ensure a proper displacement (spread outside of the adductor canal) and the distance from the delivery orifice of the catheter to the adductor canal is noted. A second investigator will assess distance from the LA delivery orifice of the catheter to the adductor canal using hydrodissection with isotonic saline to pinpoint the delivery orifice and subsequently reposition the catheter to obtain LA spread within the adductor canal. Successful repositioning is defined as a combination of LA spread within the adductor canal and loss of cold sensation on the medial part of the lower leg.

Read the detailed description

The study objective is to investigate whether it is possible to reposition a displaced suture-method catheter using ultrasound.

A peripheral nerve catheter will be inserted on each side under US guidance. An investigator will insert one catheter in the short-axis plane of the adductor canal using an in plane technique: The needle is inserted through the vastus medialis into the adductor canal and exits superficial to the femoral artery through the sartorius muscle.

The second catheter is inserted from proximal to distal direction in the long-axis plane using a combination of in-plane and out-of-plane techniques.

10mL of isotonic saline is used for hydro-dissection for both catheter insertions to facilitate placement. Both catheters are injected with 15 mL LA with an immediate assessment of the spread being within or outside the adductor canal.

Loss of cold sensation in the cutaneous saphenous nerve innervation area will be evaluated 15 minutes after injection by another investigator, who is blinded to allocation and randomization.

Following return of normal sensory function the catheter is then intentionally displaced at least 2 cm outside the adductor canal in the direction of the entry or exit site according to randomization. The distance from the LA delivery orifice of the catheter to the adductor canal is noted. Adequate displacement requires that injection of isotonic saline does not result in spread within the adductor canal.

A third investigator will assess distance from the LA delivery orifice of the catheter to the adductor canal and subsequently reposition the catheter using saline to pinpoint location of the delivery orifice. Once the catheter is repositioned LA is injected. The US scan during LA injection is performed with a fourth investigator present to evaluate for satisfactory spread within the adductor canal. The 2 investigators will not communicate regarding the assessment of spread within the adductor canal.

Evaluation of cold sensation on the medial part of the lower leg is performed 15 minutes after 15mL LA (lidocaine 10 mg/mL) injection by investigator 2. The catheters are then removed and the study is completed.

Distance from catheter delivery orifices to the adductor canal is defined as following:

Distance from the LA delivery orifice to the fascia surrounding the adductor canal is noted in the short axis group. The distance from the LA delivery orifice to the penetration of the aponeurosis lying just below the sartorius muscle is noted in the long axis group. Both represent anatomical reference points for the adductor canal.

Satisfactory spread within the adductor canal is defined as following:

The LA injection spreads deeper along the lateral side of the femoral artery, observed in the two-dimensional plane while producing minimal displacement of the roof and the overlying sartorius muscle.

The injection may spread occasionally superficially over the femoral artery within the canal and will then force the artery deeper. If the injection spreads more medially and superficially over the saphenous nerve and femoral artery in an anterolateral to posteromedial direction, initially resembling the injections within the adductor canal but separates the sartorius muscle from the femoral artery by lifting the sartorius muscle medially off the hyperechoic roof of the adductor canal it is considered not to spread within the adductor canal.13

Successful primary placement and subsequent repositioning is defined as the combination of satisfactory spread within the adductor canal (assessed using SAX visualization of the adductor canal for both catheters) and loss of cold sensation.

03

Conditions studied

  • Anesthesia
  • Pain, Postoperative
  • Pain
  • Pain, Joint
04

Who can participate

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

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female ≥18 years of age.
  • ≤ II.
  • Written obtained from subject and ability for subject to comply with the requirements of the study.

Exclusion criteria

Exclusion Criteria:

  • Previous surgery or ongoing pain or other disability of investigated region resulting in sensory or neurologic deficits in the investigated region.
  • Allergy to LA.
  • Pregnancy (all female participants will be tested for urine hCG), breastfeeding, or unwilling to practice during participation in the study.
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ASA physical status

The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
12 participants (actual)

Study arms

  • Active comparator
    SAX catheter insertion

    Ultrasound guided cather insertion in the short axis (SAX) of the adductor canal. Injection of lidocaine through the catheter

    Procedure: SAX catheter insertion

  • Active comparator
    LAX catheter insertion

    Ultrasound guided cather insertion in the long axis (LAX) of the adductor canal. Injection of lidocaine through the catheter

    Procedure: LAX catheter insertion

Interventions

  • ProcedureSAX catheter insertion

    Suture-method catheter inserted in the short axis of the adductor canal

  • ProcedureLAX catheter insertion

    Suture-method catheter inserted in the long axis of the adductor canal

06

What researchers measure

Primary outcomes

  1. Successful repositioning

    Defined as a combination of spread within the adductor canal and loss of cold sensation on the medial part of the lower leg after repositioning and second LA injection. - investigator 3 will evaluate spread and investigator 2 will evaluate cold sensation

    Time frame: 15 min after second injection

Secondary outcomes

  1. Successful primary placement

    Defined as a combination of spread within the adductor canal and loss of cold sensation after initial LA injection - investigator 1 will evaluate spread and investigator 2 will evaluate cold sensation

    Time frame: 15 min after first injection

  2. Estimation of Limits of Agreement

    in evaluation of displacement distance of the catheter between investigator 1 and 3

    Time frame: within 15 minutes, after displacement/repositioning.(recorded by after displacement and repeated just before attempted repositioning)

  3. Interrater agreement for satisfactory spread within the adductor Canal, (Cohen's Kappa)

    Investigator 3 and 4 will independently evaluate spread within the adductor canal.

    Time frame: recorded immediately after second LA injection

07

Study locations

1 site
  • Nordsjællands Hospital
    Hillerød, 3400, Denmark
08

References and documents

Publications

  • Jordahn ZM, Lyngeraa TS, Grevstad U, Rothe C, Lundstrom LH, Lange KHW. Ultrasound guided repositioning of a new suture-method catheter for adductor canal block - a randomized pilot study in healthy volunteers. BMC Anesthesiol. 2018 Oct 24;18(1):150. doi: 10.1186/s12871-018-0615-4. PubMed 30355334 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2017 to primary completion in Apr 2017, 1 month.

Of 2,094 non-industry interventional studies with no phase under Pain, Postoperative, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 6 and three quarters within 23. This study's 1 month is below that.

Counting every sponsor, half of 2,107 studies reached it within 11 months; a quarter within 6 and three quarters within 23.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 1, 2017
First posted
Oct 20, 2017
StartActual
Mar 7, 2017
Primary completionActual
Apr 18, 2017
CompletionActual
Apr 18, 2017
Last update
Oct 20, 2017
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 20, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03315481
Lead sponsor
Nordsjaellands Hospital
Responsible party
Sponsor
First posted
Oct 20, 2017
Start date
Mar 7, 2017
Primary completion
Apr 18, 2017
Completion
Apr 18, 2017
Last update
Oct 20, 2017

Study contacts

Tobias S Lyngeraa, MD
principal investigator · Research Unit, Department of Anaesthesiology and Intensive Care, Nordsjaellands Hospital Hilleroed

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2017. You cannot join it, but the record below documents what was studied.

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