Local Anaesthesia vs Regional Block for Arteriovenous Fistulae
NCT ID: NCT01706354
Last Updated: 2012-10-15
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
NA
126 participants
INTERVENTIONAL
2012-10-31
2015-10-31
Brief Summary
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Detailed Description
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In a proportion of patients, CKD will progress to end stage renal disease (ESRD). This is defined as an irreversible decline in kidney function for which renal replacement therapy (RRT) is required if the patient is to survive. In one UK study, 4% of patients with CKD progressed to develop ESRD requiring RRT over a five and a half year follow up period. The decision to commence RRT takes into account symptoms of biochemical disturbance, in conjunction with the risks and inconvenience of starting RRT. European Best Practice Guidelines recommend that RRT should commence when the estimated Glomerular Filtration Rate (eGFR) falls below 15ml/min/1.73m2 or when symptoms of uraemia, fluid overload or malnutrition are resistant to medical therapy. In an asymptomatic patient, an eGFR of below 6ml/min/1.73m2 would also prompt the initiation of dialysis. It is known that the life expectancy of patients receiving RRT is shorter than that of the general population and varies further dependent on underlying diagnosis and age. For example, the median survival for a patient in Scotland aged 45 - 64 years starting RRT for glomerulonephritis is 7.7 years, whereas the median survival of a patient in the same age group with a diagnosis of diabetic nephropathy is 2.9 years. The life expectancy of a male of the same age group within the general Scottish population is 24.2 years. Instituting RRT prolongs life and reduces the incidence of vasculo-occlusive events in patients with ESRD. As such, patients with CKD should be monitored by a nephrologist in order that timely referral for preparation for RRT can be made.
Renal replacement therapy may come in the form of haemodialysis, peritoneal dialysis or renal transplantation, and may be managed both in and out of hospital. Haemodialysis (HD) remains the most common modality of first RRT in Scotland; of 2885 patients commencing RRT during the period 2005-2009, 2264 received HD. In order to undergo HD, there must be a connection between the patient's vascular system and the dialysis machine. The most common method is surgical creation of an arteriovenous fistula (AVF), into which a needle can be inserted that in turn is connected to a dialysis machine. In 2009, 75% of Scottish patients undergoing HD underwent formation of an arteriovenous fistula (AVF). Other options for vascular access include arteriovenous grafts using synthetic materials and long-term central venous catheters, though these are associated with higher rates of occlusive and infective complications. AVF are currently regarded as the optimal form of vascular access for HD and are recommended by National guidelines. There is excellent evidence that good quality, stable vascular access is a major factor in determining survival in this group of CKD patients. Unfortunately however, around 24% - 35% of arteriovenous fistulae (AVF) fail at an early stage. Some anaesthetic techniques can influence intraoperative blood flow and venous diameter, factors which are associated with fistula success. There remains no conclusive evidence that any particular anaesthetic technique can significantly influence long term surgical outcome. This study aims to investigate whether a regional, compared to local, anaesthetic technique can affect fistula patency.
Conditions
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Keywords
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Study Design
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RANDOMIZED
SINGLE_GROUP
TREATMENT
DOUBLE
Study Groups
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Local anaesthetic
Infiltration of local anaesthetic into the surgical site by the surgeon using a combination of 0.5% L-bupivicaine prior to incision and 1% lignocaine topically after the wound is opened. Maximum dose limits of 2mg/kg for bupivicaine, and 3mg/kg for lignocaine will be observed, recognising that these are additive.
Local Anaesthetic
Infiltration of local anaesthetic into the surgical site by the surgeon using a combination of 0.5% L-bupivicaine prior to incision and 1% lignocaine topically after the wound is opened. Maximum dose limits of 2mg/kg for bupivicaine, and 3mg/kg for lignocaine will be observed, recognising that these are additive.
Regional anaesthetic
Ultrasound guided brachial plexus block. Supraclavicular will be the block performed unless there is a contraindication in which case axillary block may be used. A 1:1 mixture of 0.5% L-bupivicaine and 1.5% lignocaine with adrenaline (1 in 200,000) will be injected, up to a volume of 40ml but using a minimum of 25ml. Maximum dose limits of 2mg for bupivicaine and 7mg/kg for lignocaine with adrenaline will be observed, recognising that these are additive.
Regional anaesthetic
Ultrasound guided brachial plexus block. Supraclavicular will be the block performed unless there is a contraindication in which case axillary block may be used. A 1:1 mixture of 0.5% L-bupivicaine and 1.5% lignocaine with adrenaline (1 in 200,000) will be injected, up to a volume of 40ml but using a minimum of 25ml. Maximum dose limits of 2mg for bupivicaine and 7mg/kg for lignocaine with adrenaline will be observed, recognising that these are additive.
Interventions
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Local Anaesthetic
Infiltration of local anaesthetic into the surgical site by the surgeon using a combination of 0.5% L-bupivicaine prior to incision and 1% lignocaine topically after the wound is opened. Maximum dose limits of 2mg/kg for bupivicaine, and 3mg/kg for lignocaine will be observed, recognising that these are additive.
Regional anaesthetic
Ultrasound guided brachial plexus block. Supraclavicular will be the block performed unless there is a contraindication in which case axillary block may be used. A 1:1 mixture of 0.5% L-bupivicaine and 1.5% lignocaine with adrenaline (1 in 200,000) will be injected, up to a volume of 40ml but using a minimum of 25ml. Maximum dose limits of 2mg for bupivicaine and 7mg/kg for lignocaine with adrenaline will be observed, recognising that these are additive.
Eligibility Criteria
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Inclusion Criteria
* Adult patients \>18 years old
* Competent to give consent
* Scheduled for primary AVF formation at either radial or brachial artery.
Exclusion Criteria
* Coagulopathy
* Infection at the anaesthetic or surgical site.
* Patient preference for general or alternative anaesthesia
* Significant peripheral neuropathy or neurologic disorder affecting the upper extremity
* Pregnancy
* Previous AVF creation
* Known cephalic vein occlusion, central vein stenosis, brachial or radial artery stenosis
* Vein or artery less than 1.8mm, as measured by ultrasound
18 Years
ALL
No
Sponsors
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NHS Greater Glasgow and Clyde
OTHER
Emma Aitken
OTHER
Responsible Party
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Emma Aitken
Clinical Research Fellow Department of Renal Surgery
Principal Investigators
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Marc Clancy, MBBS FRCS
Role: PRINCIPAL_INVESTIGATOR
NHS Greater Glasgow and Clyde
Locations
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Department of Renal Surgery, Western Infirmary
Glasgow, , United Kingdom
Countries
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Central Contacts
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Facility Contacts
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Marc Clancy, MBBS PhD FRCS
Role: primary
Emma Aitken, MBChB MRCS
Role: backup
References
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Aitken E, Kearns R, Gaianu L, Jackson A, Steven M, Kinsella J, Clancy M, Macfarlane A. Long-Term Functional Patency and Cost-Effectiveness of Arteriovenous Fistula Creation under Regional Anesthesia: a Randomized Controlled Trial. J Am Soc Nephrol. 2020 Aug;31(8):1871-1882. doi: 10.1681/ASN.2019111209. Epub 2020 Jul 24.
Aitken E, Jackson A, Kearns R, Steven M, Kinsella J, Clancy M, Macfarlane A. Effect of regional versus local anaesthesia on outcome after arteriovenous fistula creation: a randomised controlled trial. Lancet. 2016 Sep 10;388(10049):1067-1074. doi: 10.1016/S0140-6736(16)30948-5. Epub 2016 Aug 1.
Macfarlane AJ, Kearns RJ, Aitken E, Kinsella J, Clancy MJ. Does regional compared to local anaesthesia influence outcome after arteriovenous fistula creation? Trials. 2013 Aug 19;14:263. doi: 10.1186/1745-6215-14-263.
Other Identifiers
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12/WS/0199
Identifier Type: -
Identifier Source: org_study_id