data dialogue discovery - bbts · unit age at transfusion (days) pilot - aneg. pre-pilot - aneg....
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Data ...Dialogue ....Discovery .....
Account for Blood
Dr Karen BailieSNBTS, Glasgow
BBTS 2017
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AfBSnapshot
STEDData Mart
ACaDMeData Mart
AfB Data Mart
Blood Bank Systems
Patient file Stock file
Stock PositionReports
Clinical Context Reports
Transfusion Activity Reports
Stock Management
Reports
InputProcessingOutput
AfBRoutine, up-to-date national data on the supply & use of blood components(2009 to date)
ACaDMeNHSS hospital episode data provide the clinical context in which blood components are used.
Linkage By rules for date & clinical priority; updated monthly (after ACaDMe load)
AfB Data Flows
Similar Data:Netherlands (2010)Scandinavia (2012)
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AfB OutputsMetrics• Patients & procedures
• Transfused patients & procedures
• Units transfused
• Units fated
Comparisons• By Consultant responsible for care
• By hospital (type) / Health Board
• Temporal
Routine reports• Stock transactions
• Surgical blood use
• Age & gender specific blood use
• Blood use by other clinical group
Ad hoc data• NHSS Clinical teams
• SNBTS management info e.g. HEV/HCV
• BBT research & audit programme
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Using AfB data to understand patterns of blood use
Transfusion Epidemiology
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Temporal Trends in Blood Use
05,000
10,00015,00020,00025,00030,000
Num
ber o
f uni
ts /
patie
nts
Year
Platelets
Booked in
Units transfused
Patientstraansfused
05,000
10,00015,00020,00025,00030,000
Num
ber o
f uni
ts /
patie
nts
Year
FFP
Booked in
Units transfused
Patientstraansfused
0500
1,0001,5002,0002,5003,0003,5004,000
Num
ber o
f uni
ts /
patie
nts
Year
Cryoprecipitate
Booked in
Units transfused
Patients traansfused
0
50,000
100,000
150,000
200,000
250,000
Num
ber o
f uni
ts /
patie
nts
Year
Red cells
Booked in
Units transfused
Patientstransfused
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Transfusion Rates by Age & Gender(2016 data)
0
20
40
60
80
100
120
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200
0 - 45 - 9 10 -14
15 -19
20 -24
25 -29
30 -34
35 -39
40 -44
45 -49
50 -54
55 -59
60 -64
65 -69
70 -74
75 -79
80 -84
85 -89
90+
Uni
ts tr
ansf
used
per
100
0 po
pula
tion
Age band (years)
RBCs
MaleFemale
0
2
4
6
8
10
12
14
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0 - 45 - 9 10 -14
15 -19
20 -24
25 -29
30 -34
35 -39
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45 -49
50 -54
55 -59
60 -64
65 -69
70 -74
75 -79
80 -84
85 -89
90+
Uni
ts tr
ansf
used
per
100
0 po
pula
tion
Age band (years)
Platelets
MaleFemale
0
2
4
6
8
10
12
0 - 45 - 9 10 -14
15 -19
20 -24
25 -29
30 -34
35 -39
40 -44
45 -49
50 -54
55 -59
60 -64
65 -69
70 -74
75 -79
80 -84
85 -89
90+
Uni
ts tr
ansf
used
per
100
0 po
pula
tion
Age band (years)
FFPMale
Female
Component All UnitsTransfused
Units transfused with missing data
% units with missing data
RBCs 136131 2459 1.8%
Platelets 21034 707 3.3%
FFP 14460 643 4.3%
Cryo 2197 258 10.5%
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Transfusion Rates by Age & Gender
Red Cell Transfusion Rates▼over time greater in older
age groups
Red Cell Transfusion RatesMales > Females
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Red Cell Use by Clinical Setting
‘Other’ includes:•Radiology•Psychiatry•Dental•GP
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Red Cell Use by Primary Diagnosis(ICD10 Chapter)
CancerHaematology
GastrointestinalInjuries
Circulatory
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Red Cell Use by Primary Diagnosis(ICD10 Chapter)
Respiratory“Other”
GenitourinaryMusculoskeletal
Obstetrics
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Red Cell Use: The future?
0
20000
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2009 2010 2011 2012 2013 2014 2015 2016 2024 2029 2034 2039
Unitsper Annum
Year
Red Cell Units Transfused: Actual (2009-16) & Predicted based on demographic change
Assumes no change to current drivers of clinical use (rates):•Disease incidence & prevalence•Transfusion triggers•Blood conservation•Anaemia management •New treatments•New surgical techniques•Eligible patients
Actual RBC use
Predicted RBC use
?
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Using AfB data to inform clinical transfusion practice
Hospital Transfusion Committees
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Adult Group O D neg RBC
2009 2010 2011 2012 2013 2014 2015 2016Units booked in (all groups) 182900 191011 179704 176967 171183 161379 154615 145029O Neg Units Booked in 22129 23706 22658 22615 23294 21410 20353 19737O Neg Units Transfused 19918 21871 21455 21664 21408 19050 18287 17762
0
50000
100000
150000
200000
250000
Number of Units
Red Cell Demand from Hospital Blood Banks
All groups: ▼20.5%O Neg: ▼10.8%O Neg Tx: ▼10.8%
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Group O Rh(D) Red Cell Use
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Group O Rh(D) Red Cell Use
Correlation coefficient R2
% O neg units outdated 0.498 0.247% O neg units not transfused 0.599 0.358% O neg units cross-grouped 0.838 0.696
Each point represents the data for an individual blood bank over a quarter year
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Group O Rh(D) ‘Cross grouping’
Reason for Cross Group Number of units
Proportion of units
Proportion with O Rh(D) positive recipient
Emergency transfusion 181 21% 50%
Serological 129 15% 44%
ABO Availability 48 6% 0
Short date (≤5 days to exp) 368 43% 86%
Unknown 131 15% 84%
Total 857 100% 67%
• National Scottish audit (2012) • Adult red cell units cross grouped in 2 months (October & November)• KPI for cross-grouping reduction set in 2014• Local re-audit
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Surgical Blood Use Dashboard
Pre-filtered for Health Board
Select Hospital
Select blood component
Filter-responsive graphs
Hover-over pop-up details box
6 year trends
Top-10 display
Scroll down to view more
Select procedure
Standard STED measures
National hospital type comparisons
Latest financial year data table
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Reviewing the MSBOS• Actual blood use per patient by surgical
procedure– % patients transfused; no. of units transfused
• Individual Hospital / Health Board data• Compare with current MSBOS • Inform & agree change – mostly reduction
– Cross match to Group & Save– Group & save to no sample
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Using AfB data to assess demand and monitor new policy impact
Policy Impact
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Confirmatory Group PolicyPotential impact on demand for O, D negative blood?Base data: 2015 activity; Historical data: 2009-2015
• Red cell units issued on first sample (i.e. No historical sample in dataset)– All recipient groups: 18.3%– Non-O D negative recipients: 16.6%
• Red cell units transfused on first sample:– All recipient groups: 14.5%– Non-O D negative recipients:13.1%
• ‘Urgency’ of transfusion: – Within 1 hour of sample receipt: 0.9% transfusions (all recipient groups)– Within 2 hours of sample receipt: 2.3% transfusions (all recipient groups) – Within 6 hours of issue: 18% transfusions (all recipient groups)
• In practice - none - yet!– Efficiency vs urgency influences turnaround time– Returns to stock – Use of units that would otherwise have time expired– Use of units that would otherwise have been cross-grouped
Additional 15,000 units per annum
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Confirmatory Group Policy
2013 2014 2015 2016Implemented 12191 11354 11071 10857Not Implemented 11103 10056 9282 8880
0
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Number of O Neg units booked in
O Neg demand: 2nd sample policy vs no policy
16 Blood Banks
0 Blood Banks
2 Blood Banks
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Using AfB data to measure and improve supply chain performance
Innovate UK Knowledge Transfer Partnership
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The blood supply chainTransfusion
Manufacturing
P&T
Raw Material supplierDonor
Services
DeliveryFinished goods
Units returned to blood bank
Units reserved to patient
Donor Patient
Demand
Central stock
Dispatch
Hospital stock
Order placed
Clinical order
Patient demand: Transfusion requirement
Whole blood donation
Supply
SNBTS
A good supply chain aligns all their activities to fulfil the requirements of the end customer …. Patients (& clinicians)• Over supply is wasteful• Under supply impairs quality of care with potential for
adverse patient outcomes
Collection quantity
Demand signal moves backwards with each level responding to a signal generated from the preceding downstream level
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We measure bullwhip using the classic amplification ratio (AR):
𝐴𝐴𝐴𝐴𝐵𝐵/𝐴𝐴 = 𝐶𝐶𝐶𝐶𝐶𝐶𝐵𝐵𝐶𝐶𝐶𝐶𝐶𝐶𝐴𝐴
CoV = Coefficient of variationA,B = supply chain echelons where A is closest to the end consumer
transfused booked In donatedAR Ratios 1.75 1.26 CoV 28.3% 49.5% 62.6%
StDev 46.8 89.4 117.9
Avg units pd 165 181 188
AR > 1 indicates presence of Bullwhip
Bullwhip in the blood supply chain The bullwhip effect occurs when the demand signals in the supply chain are amplified as they move backwards through the supply chain
• Inventory swings• Surplus expedited
deliveries• Surplus inventory
TIMEX• Older age of blood at
transfusion• Pressure on upstream
supply chain activities
Impact
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Bullwhip in the blood supply chain
Bullwhip ratios between supply chain echelons for different RBC components
Present in all blood groups except for ABNEG
Most amplification is introduced by hospital blood banks
Ampl
ifica
tion
Dam
peni
ng
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Causes of Bullwhip in the Blood Supply Chain
02468
101214161820
No.
of u
nits
Demand amplification ONEG RBC at Hospital A
transfusedbooked in
Causes of Bullwhip
Price fluctuations/ promotions
Order ‘Just in case’
Different experiences/ comfortable stock
level
Not sure how many units will
be returned
Over-reaction to clinical orders demand signal
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An Inventory Replenishment PilotAim: To determine the impact of a data driven inventory replenishment model on blood bank ordering volatility and the bullwhip effect
Case StudyBlood bank at a large acute hospitalInventory control policy: Target Stock Level/Order up to with Cycle Safety StockPolicy was tested on 5 high volume, fast moving RBC components:
ANEG RBC APOS RBC BPOS RBC
ONEG RBC OPOS RBC
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Impact on Ordering & BullwhipPRE PILOT ANEG APOS BPOS ONEG OPOS
Average order size 1.25 6.93 1.73 2.88 9.93No. of positive order days 15 32 18 21 38
Av. interval between orders 3.7 1.8 3.1 2.7 1.5CoV order size 1.74 1.14 1.85 1.65 1.03
PILOT ANEG APOS BPOS ONEG OPOSAverage order size 1.93 5.86 1.88 2.73 8.34
No. of positive order days 18 52 22 22 52Av. interval between orders 3.1 1.1 2.5 2.5 1.1
CoV order size 2.17 1.11 1.83 1.58 0.88% Change CoV order size +25% -3% -11% -4% -14%
Less volatile ordering
Smaller, more frequent ordering
Reduction in BullwhipANEG APOS BPOS ONEG OPOS
Pre Pilot Bullwhip Ratio 1.48 1.83 1.89 1.84 1.96Pilot Bullwhip Ratio 1.64 1.70 1.51 1.20 1.59
AR Change +0.16 -0.13 -0.38 -0.64 -0.37% AR Change +10.6% -7.09% -19.8% -35.0% -19.2%
If all blood banks adopted measures to reduce order volatility, then the cumulative effect would smooth the aggregate demand signal thus reducing pressure on blood processing and collection activities, and improve the match between supply and demand.......
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0%
2%
4%
6%
8%
10%
12%
14%
8 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 35
% o
f uni
ts
Unit age at transfusion (days)
Pilot - ANEG
Pre-Pilot - ANEG
Pilot: 18.71Pre pilot: 24.08
Impact on component age at transfusion & deliveries• More regular use of scheduled deliveries, and 50% reduction in use of
costly ad hoc deliveries of RBC components• Average component age at transfusion revealed a reduction in age of
between 0.7 days (APOS) to 7.2 days (BPOS)
5.37 day reduction
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Data, Dialogue, Discovery...
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Acknowledgements
• Dr Katherine Forrester Transfusion Researcher, SNBTS
• BBT teams throughout Scotland
• Siu Cheng & Dr Christine Rutherford KTP Project Team, Heriot Watt University
• Innovate UK (KTP 9479)