CClinicalTrials.gg
Status unknownNCT03886116Updated Sep 27, 2021

Effect of Pre-operative Forearm Exercises on Arterial Venous Fistula Maturation and Blood Flow

An interventional study of Exercise in End Stage Renal Disease and Arteriovenous Fistula, sponsored by Singapore General Hospital. Status unknown at 1 site in Singapore. Open to participants aged 21 Years to 90 Years. Per ClinicalTrials.gov, last updated 2021-09-27.

Sponsored by Singapore General Hospital · Not applicable, Interventional, and Supportive care

The sponsor has not verified this record recently (last verified Sep 2021), so the status shown — last known as Recruiting — may be out of date.

From the registry’s dates

  • Registered 3 months after the study started (first participant enrolled Nov 2018, registered Mar 2019).
Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
21 Years to 90 Years
Sex
All
01

Study summary

This study will investigate the effect of pre-operative exercise on hemodynamics in the fistula artery and vein, Pre and Post Arteriovenous Fistula Formation as well as the suitability of Cannulation of Arteriovenous Fistula at 12 weeks Post Surgery.

This is a randomised control study with 20 patients each in the Control arm (Group A) or the Exercise arm (Group B). The subjects will be randomised into 1:1 into one of the two groups.

The patients will have an ultrasound doppler vein mapping done prior surgery and the necessary follow up visits.

Read the detailed description

The incident and prevalent population on renal replacement therapy for End Stage Renal Disease (ESRD) is steadily increasing in Singapore as well as other countries worldwide. Around 85 - 90% of the prevalent dialysis population is on Hemodialysis and Arteriovenous Fistula (AVF).

AVF is considered the Gold standard for safe and effective vascular access for hemodialysis treatment due to its low rates of complication. However, Primary Failure rate of AVFs remain high at around 20 - 25% depending on the site of the surgery, contributed by several factors including the diameter of the artery and the vein used for AVF formation.

If Pre-operative exercise improves the hemodynamics of the AVF and aids the maturation rate in our study, it can be incorporated into clinical guidelines to reduce the primary failure rate of AVF.

Even though, there is sufficient evidence to support the beneficial role of the forearm exercises on fistula blood flow and maturation, there are no studies looking at the effects of Pre-Operative Exercise on AVF maturation. Our Study is aiming to fulfil this gap in knowledge.

02

Conditions studied

  • End Stage Renal Disease
  • Arteriovenous Fistula

Keywords

  • Arteriovenous Fistula
  • AVF Maturation
  • Pre Operative exercise
03

In context

Kidney Failure, Chronic

2,085 studies on the registry are indexed under Kidney Failure, Chronic; 260 are open to participants now.

This study's planned enrollment of 40 is below the median of 55 across 1,557 interventional studies indexed under Kidney Failure, Chronic.

Browse Kidney Failure, Chronic studies →

Lead sponsor

Singapore General Hospital is the lead sponsor of 266 studies on the registry; 57 are open to participants now.

Of its 8 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

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

04

Who can participate

Ages eligible
21 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Age >=21 to \<= 90.
  • Chronic Kidney Failure patients with Estimated Glomerular Filtration Rate (eGFR) less than 20mls/min.
  • Haemodialysis is chosen as their modality of renal replacement therapy.

Exclusion criteria

Exclusion Criteria:

  • Potential fistula vein diameter \<= 3mm (with application of tornique) on initial vein mapping.
  • Known Left ventricular ejection fraction of less than 20% on Echo diagram.
  • Previous stroke effecting the AVF arm.
  • Calcified brachial or radial arteries and/or duplex evidence of stenosis of >= 50%
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (estimated)

Study arms

  • Active comparator
    Exercise

    Patient randomized are required to squeeze a soft ball 10 times for a set. They are required to perform 3 sets of 10 squeezes each at a 1 Minute interval. 3 sets of exercises to be performed twice in the Morning and Evening, for a total of 6 weeks.

    Other: Exercise

  • No intervention
    No Exercise

    Patient is not required to do any exercise.

Interventions

  • OtherExercise

    3 sets of 10 forearm exercises performed twice in the Morning and Evening for 6 weeks.

06

What researchers measure

Primary outcomes

  1. Change of Diameter of the vein at 5cm, 10cm & 15cm from wrist joint/elbow joint

    Measure with the use of an Ultrasound Doppler

    Time frame: Baseline, 1 Week Pre-Op, 6 Weeks Post-Op

  2. Diameter of the Artery - Brachial & Radial

    Measure with the use of an Ultrasound Doppler

    Time frame: Baseline

  3. Diameter of the Artery used for AVF

    Measure with the use of an Ultrasound Doppler

    Time frame: 1 Week Pre-Op

  4. Change of Blood Flow Rate in the Artery

    Measure with the use of an Ultrasound Doppler

    Time frame: Baseline, 1 Week Pre-Op, 6 Weeks Post-Op

  5. Diameter of the fistula vein at 5cm, 10cm & 15cm from anastomosis

    Measure with the use of an Ultrasound Doppler

    Time frame: 6 Weeks Post-Op

  6. Diameter of the artery 2cm above anastomosis

    Measure with the use of an Ultrasound Doppler

    Time frame: 6 Weeks Post-Op

  7. Suitability for Cannulation

    Measure with the use of an Ultrasound Doppler

    Time frame: 6 Weeks Post-Op

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Study locations

1 of 1 sites recruiting
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References and documents

Publications

  • Kong S, Lee KS, Kim J, Jang SH. The effect of two different hand exercises on grip strength, forearm circumference, and vascular maturation in patients who underwent arteriovenous fistula surgery. Ann Rehabil Med. 2014 Oct;38(5):648-57. doi: 10.5535/arm.2014.38.5.648. Epub 2014 Oct 30. PubMed 25379494 ↗
  • Salimi F, Majd Nassiri G, Moradi M, Keshavarzian A, Farajzadegan Z, Saleki M, Nikpoor A, Ghane M. Assessment of effects of upper extremity exercise with arm tourniquet on maturity of arteriovenous fistula in hemodialysis patients. J Vasc Access. 2013 Jul-Sep;14(3):239-44. doi: 10.5301/jva.5000123. Epub 2013 Jan 3. PubMed 23283645 ↗
  • Uy AL, Jindal RM, Herndon TW, Yuan CM, Abbott KC, Hurst FP. Impact of isometric handgrip exercises on cephalic vein diameter in non-AVF candidates, a pilot study. J Vasc Access. 2013 Apr-Jun;14(2):157-63. doi: 10.5301/jva.5000116. Epub 2012 Dec 12. PubMed 23258587 ↗
  • Rus RR, Ponikvar R, Kenda RB, Buturovic-Ponikvar J. Effect of local physical training on the forearm arteries and veins in patients with end-stage renal disease. Blood Purif. 2003;21(6):389-94. doi: 10.1159/000073441. PubMed 14586181 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 27, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03886116
Lead sponsor
Singapore General Hospital
Responsible party
Sponsor
First posted
Mar 22, 2019
Start date
Nov 28, 2018
Primary completion
Dec 2021 (estimated)
Completion
Dec 2021 (estimated)
Last update
Sep 27, 2021

Study contacts

Tang Tjun Yip
Contact
tang.tjun.yip@singhealth.com.sg
65767986
Irdina Izwani Bte Shrmani
Contact
irdina.izwani.shrmani@sgh.com.sg
Tang Tjun Yip
principal investigator · Singapore General Hospital
Lee Qing Wei Shaun
principal investigator · Singapore General Hospital

Oversight

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

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This study is status unknown, as verified in Sep 2021. You cannot join it, but the record below documents what was studied.

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