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Chronic arthropathy management in haemophilia:
assessing the impact of a new model of care
Healthcare costs are rising and are recognised as being
unsustainable at the current rate of expenditure in New Zealand. Cost is a major
consideration in the management of haemophilia, a lifelong bleeding disorder,
predominantly due to the expensive factor replacement therapy required for
patients with severe disease.
The challenge for clinicians managing high-cost chronic
conditions such as haemophilia is to show leadership by innovation and a
preparedness to do things differently with the aim of achieving the best value
for money without compromising quality of care.
With this objective in mind the Auckland DHB Regional
Haemophilia Centre introduced a modified multidisciplinary treatment approach
for adult patients with severe haemophilia in 2009. It is recognised that more
than 85% of all bleeding episodes are within the peripheral musculoskeletal
system with the overwhelming majority occurring within knees, ankles and elbows
(1). As few as four bleeds into a single joint prior to epiphyseal fusion can
mediate an irreversible cycle of joint destruction with long-term haemophilic
arthropathy when primary prophylaxis, the current standard of care, is not used
(2, 3).
Many of our adult patients were unable to be treated with
primary prophylactic factor replacement during their younger years and therefore
have significant arthritic joint disease. Most however find it impossible to
differentiate between bleeding-associated joint pain and pain secondary to the
underlying arthropathy when joint symptoms occur and usually default to managing
the symptoms with expensive factor concentrate replacement therapy. This is
relatively ineffective if the pain is due to arthritis and therefore
inappropriately costly for the healthcare system. The goal of our modified
management approach was to optimise the use of factor replacement by ensuring an
early correct diagnosis of the precise cause of joint pain and providing the
correct intervention.
We selected our highest-user adult patients, including both
those receiving ‘secondary’ prophylaxis and ‘on demand’
treatment regimens. All patients had a past medical history of recurrent joint
bleeds and significant haemophilic arthropathy involving at least one joint.
Updated studies of the factor peak level and half-life were
performed to ensure that each dose (based on body weight) and the weekly dosing
regimen resulted in an adequate duration of response. Overweight patients were
also educated about weight reduction to potentially reduce both the required
dose size and the impact of excess weight on their joints. All patients within
the cohort were encouraged to report suspected ‘bleeds’ as soon as
they occurred and a rapid assessment pathway introduced enabling immediate or
early assessment with the goal being within 24 hours of the symptoms being
reported.
Product usage was closely monitored when symptoms were due
to an acute bleed but arthritic symptoms were managed aggressively with
effective analgesia using the funded Cox-II inhibitor Meloxicam and
physiotherapy. A low impact, low resistance exercise-based rehabilitation
programme was provided under the supervision of our senior haemophilia
physiotherapy practitioner to improve muscle strength, proprioception and
biomechanics with a focus on reducing the load on arthritic joints, improving
aerobic capacity and emphasising the importance of continued weight
control.
An audit of the service was undertaken. The analysis
included the 29 highest users of factor VIII/ IX (excluding inhibitor patients)
in the wider Auckland region for 2009/10 financial year compared to product
orders for the same individuals in the 2010/11 year. In the 2009/10 financial
year these 29 patients had total product orders of 5,312,500iu (international
units) at a cost of approximately NZ$1 per unit.
In the following 2010/11 financial year these same patients
recorded total product orders of 4,295,000iu, a year-on-year reduction of 19%.
Over the same period, data collected independently of this audit revealed that
orders for the most commonly used FVIII concentrates (used by 80% of patients in
the region) had fallen from an average of 400,000iu/ month to 245,000iu/ month,
a 39% reduction consistent with the findings from the audited patient
group.
A patient satisfaction audit was developed. Twenty two
patients were asked to complete the questionnaire and return it by post. A 68%
response rate was achieved. Patients either agreed or strongly agreed to each of
the nine question fields which assessed their perception of the knowledge of
their condition by the clinical team, interdisciplinary communication within the
team, direct access to the specialist nurse or physiotherapy care, a timely
response to all patient queries and overall usefulness of the service. Crucially
all respondents either agreed or strongly agreed that the service had improved
over the preceding 12 months, indicating that they did not perceive the changed
model of care to be a purely cost-saving exercise.
In summary, this revised treatment approach resulted in a
19% reduction in year-on-year product orders for the audit population
corresponding to an indicative saving in excess of one million dollars. The
approach was multifaceted but in essence was directed towards early diagnosis of
pain not attributable to a joint bleed and reducing the likelihood that factor
concentrate is used inappropriately for a prolonged period for an incorrect
indication. This meant a change for patients who had become used to relatively
independent home therapy management afforded by the more widespread availability
and ease of use of high specific activity recombinant factor concentrates.
The patient satisfaction audit during the same period
confirmed patient acceptance and a positive perception of the closer supervision
of product use. Cost saving was achieved without compromising patient outcome.
Ian d’Young
Physiotherapy Practitioner and National Clinical Lead for Haemophilia Physiotherapy Auckland District Health Board iand@adhb.govt.nz Dr Laura Young
Consultant Haematologist Department of Haematology, Auckland District Health Board Mary Brasser
Nurse Specialist Auckland DHB Haemophilia Centre, Auckland District Health Board Dr Paul Ockelford
Consultant Haematologist Department of Haematology, Auckland District Health Board References:
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