Patient flow to carotid endarterectomy: hastening the patient journey
Manar Khashram,* Justin A. Roake*† and David R. Lewis*†
*University of Otago, Christchurch School of Medicine and
†Department of Vascular, Endovascular and Transplant Surgery. Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand
Key words
audit, carotid endarterectomy (CEA), delay, guideline,
timing.
Abbreviations
CEA, Carotid Endarterectomy; TIA, transient ischaemic
attack; US, ultrasound.
Correspondence
Dr Manar Khashram, University of Otago, Christchurch
School of Medicine, PO Box 4345, Christchurch 8013,
New Zealand. Email: manar.khashram@gmail.com
M. Khashram MbChB; J. A. Roake MbChB, DPhil,
FRCS, FRACS; D. R. Lewis MBChB MD EBSQ(vasc)
FRACS, FRCS
Accepted for publication 23 August 2009.
doi: 10.1111/j.1445-2197.2010.05308.x
Abstract
Background: Early carotid endarterectomy (CEA) after stroke or transient ischaemic
attack is the proposed standard of care to prevent recurrent ischaemic events in
selected patients. The aim of this study was to investigate if this standard is achieved
in a tertiary vascular unit.
Methods: This was a clinical audit. CEAs performed from 1 January 2006 to 31
December 2008 at Christchurch hospital were identified. The value stream from initial
presentation to surgery was mapped in two phases (phase 1; 2006–2007 and phase 2;
2008). Patients who had carotid intervention for asymptomatic carotid lesions were
excluded.
Results: The relevant patient journey was documented in 81 patients (55 phase 1; 26
phase 2). Median time from initial presentation to carotid ultrasound was 5 days in
phase 1 and 6 days in phase 2. Time from presentation to vascular surgery review was
22 days in phase 1 and 13 days in phase 2. Time from presentation to CEA significantly
reduced from 83 to 32 days between phases (P < 0.005).
Conclusions: There has been a significant decrease in time from presentation to
operation between phase 1 and 2. The most significant change is reduced delay
between vascular surgery review and CEA. There has been no improvement in urgency
of referral for imaging or surgical review. This part of the patient journey is a target for
improvement.
Introduction
The risk of recurrent stroke after a minor stroke or a transient
ischaemic stroke is highest in the first 90 days. Urgent carotid
endarterectomy (CEA) for transient ischaemic attacks (TIA)/minor
strokes has been accepted as standard practice to prevent the
maximum number of strokes in selected patients. The Carotid Endar-
terectomy Trial Collaborators (CETC) published the pooled analysis
from the three randomized controlled trials (VeteransAffairs (VA)
study, North American Symptomatic Carotid Endarterectomy Trial
(NASCET) and European Carotid Surgery Trial (ECST)) showing
that CEA generated the lowest numbers needed to prevent strokes
when surgery was performed within 2 weeks from the neurological
event compared to over 12 weeks.
1
Up to 15% of ischaemic strokes are associated with significant
(>50%) ipsilateral carotid stenosis and the risk of recurrent events is
higher in patients with carotid atherosclerotic disease.
2
Several trials
have shown a substantial reduction in stroke risk when TIA/minor
strokes are managed acutely (medically and surgically) compared to
outpatient or ‘standard’ treatment.
3–5
Despite this, published evidence also shows that urgent CEA
practice is only being offered in a few institutes. Reasons for
delays are multifactorial and include lack of education, a possible
increase in operative risk with early CEA, lower priority compared
to other conditions such as heart disease and cancer and reduced
research funding.
6
Recently, observational studies from Canada,
United Kingdom, Australia and New Zealand showed discrepancy
in TIA management and, subsequently, delays in performing
CEA.
7–10
Most of the barriers to urgent management have been attributed to
delays in referrals and access to resources. Knowing these benefits,
the question arises: How could symptomatic patients be diagnosed,
have appropriate investigations and management in this small
window of opportunity?
In January 2008, the Department of Vascular Surgery at
Christchurch Hospital adopted an informally agreed policy to
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