Impact of a Pharmacist-Directed Anticoagulation Service on the Quality and Safety of Heparin-Induced Thrombocytopenia Management

Quality improvement approaches to heparin-induced thrombocytopenia: a scoping review

Background

Heparin-induced thrombocytopenia (HIT) is a relatively uncommon condition characterized by 2 exceedingly common phenomena in hospitalized patients: thrombocytopenia and heparin exposure. Consequently, HIT is frequently overdiagnosed and inappropriately treated. These issues are the focus of many quality improvement (QI) initiatives.

Objectives

In this scoping review, we identified and characterized all published QI studies on improving the diagnosis and management of HIT.

Methods

We conducted a systematic literature search through April 2022 for studies reporting on QI interventions regarding the diagnosis, treatment, and/or prevention of HIT.

Results

Thirty studies were included in the final review. Studies were separated into 5 groups based on the focus of the interventions: increasing HIT recognition, reducing HIT incidence, reducing HIT overdiagnosis, promoting safer HIT management, and creating HIT task forces. Nine studies focused on the implementation of 4Ts score calculator into electronic medical record orders for HIT testing, while only 1 evaluated the impact of reducing unfractionated heparin use in favor of low-molecular-weight heparin. Six studies focused on the implementation of direct thrombin inhibitor management protocols, while none evaluated the use of alternative anticoagulants in HIT management.

Conclusion

The bulk of published HIT QI research focused on reducing overdiagnosis and promoting safer direct thrombin inhibitor therapy, while minimal attention has been devoted to HIT prevention and the use of evidence-based alternative HIT therapies.

Critical Care Pharmacists: A Focus on Horizons

Critical care pharmacy has evolved rapidly over the last 50 years to keep pace with the rapid technological and knowledge advances that have characterized critical care medicine. The modern-day critical care pharmacist is a highly trained individual well suited for the interprofessional team-based care that critical illness necessitates. Critical care pharmacists improve patient-centered outcomes and reduce health care costs through three domains: direct patient care, indirect patient care, and professional service. Optimizing workload of critical care pharmacists, similar to the professions of medicine and nursing, is a key next step for using evidence-based medicine to improve patient-centered outcomes.

The impact of an electronic hospital system on therapeutic drug monitoring

WHAT IS KNOWN AND OBJECTIVE

Australian hospitals have undergone a transformation with both a review and expansion of traditional roles of healthcare professionals and the implementation of an ieMR. The implementation of an ieMR brings large scale organizational change within the health system especially for staff with direct patient contact. This is changing the future of healthcare and the roles of healthcare professionals. There is minimal research on the impact of these electronic systems on the people and processes required to realise the improvements in patient care such as therapeutic drug monitoring (TDM) and the role of the pharmacist within the TDM process. The literature has discussed the use of computerised programs to assist with the interpretation of results and calculating of doses but the impact of an ieMR on the TDM process has not been discussed. This study undertook a retrospective analysis at an Australian tertiary hospital to investigate the impact of a digital hospital system on TDM within the facility.

METHODS

A 2-year retrospective audit was conducted on TDM at an Australian Tertiary Hospital. The periods were 2016 (a paper-based hospital) and 2018 (ieMR). Patients were identified using the pathology database. Patients were excluded if under the age of 18, in an outpatient setting or the emergency department. Progress notes, medication charts, ieMR and other relevant pathology were reviewed. They were assessed for appropriateness of the timing of collection, compliance to recommended TDM guidelines, and pharmacist documentation.

RESULTS AND DISCUSSION

A total of 2926 observations were included in the analysis. There was as similar percentage of appropriately collected samples between the paper-based system (2016) and the digital hospital system (2018) with 59% and 58% respectively. Results of logistic regression analysis models show the effect of year was not significant with regards to TDM for either a sample being appropriate or the dose adjustment being appropriate. Samples for TDM were more likely to be appropriate if the pharmacist had documented advice but less likely with regards to appropriate dose adjustment. This study considered the effect of introducing a hospital wide digital system on TDM processes. Overall, the results indicate no difference between the paper-based system and ieMR for appropriate samples and doses adjustments.

WHAT IS NEW AND CONCLUSION

To our knowledge, this is the first study of this kind looking at the impact of a digital hospital system on TDM. The introduction of a digital hospital system does not appear to have made improvement on the effective use of TDM. Inappropriate sampling as seen in this study can lead to ineffective clinical management of patients, inefficient use of time, and waste of financial resources. Further work is required to incorporate specific guidance and recommendations within the digital system to optimize TDM.

Position Paper on Critical Care Pharmacy Services: 2020 Update

OBJECTIVES

To provide a multiorganizational statement to update recommendations for critical care pharmacy practice and make recommendations for future practice. A position paper outlining critical care pharmacist activities was last published in 2000. Since that time, significant changes in healthcare and critical care have occurred.

DESIGN

The Society of Critical Care Medicine, American College of Clinical Pharmacy Critical Care Practice and Research Network, and the American Society of Health-Systems Pharmacists convened a joint task force of 15 pharmacists representing a broad cross-section of critical care pharmacy practice and pharmacy administration, inclusive of geography, critical care practice setting, and roles. The Task Force chairs reviewed and organized primary literature, outlined topic domains, and prepared the methodology for group review and consensus. A modified Delphi method was used until consensus (> 66% agreement) was reached for each practice recommendation. Previous position statement recommendations were reviewed and voted to either retain, revise, or retire. Recommendations were categorized by level of ICU service to be applicable by setting and grouped into five domains: patient care, quality improvement, research and scholarship, training and education, and professional development.

MAIN RESULTS

There are 82 recommendation statements: 44 original recommendations and 38 new recommendation statements. Thirty-four recommendations represent the domain of patient care, primarily relating to critical care pharmacist duties and pharmacy services. In the quality improvement domain, 21 recommendations address the role of the critical care pharmacist in patient and medication safety, clinical quality programs, and analytics. Nine recommendations were made in the domain of research and scholarship. Ten recommendations were made in the domain of training and education and eight recommendations regarding professional development.

CONCLUSIONS

Critical care pharmacists are essential members of the multiprofessional critical care team. The statements recommended by this taskforce delineate the activities of a critical care pharmacist and the scope of pharmacy services within the ICU. Effort should be made from all stakeholders to implement the recommendations provided, with continuous effort toward improving the delivery of care for critically ill patients.

Non-medical prescribing versus medical prescribing for acute and chronic disease management in primary and secondary care

BACKGROUND

A range of health workforce strategies are needed to address health service demands in low-, middle- and high-income countries. Non-medical prescribing involves nurses, pharmacists, allied health professionals, and physician assistants substituting for doctors in a prescribing role, and this is one approach to improve access to medicines.

OBJECTIVES

To assess clinical, patient-reported, and resource use outcomes of non-medical prescribing for managing acute and chronic health conditions in primary and secondary care settings compared with medical prescribing (usual care).

SEARCH METHODS

We searched databases including CENTRAL, MEDLINE, Embase, and five other databases on 19 July 2016. We also searched the grey literature and handsearched bibliographies of relevant papers and publications.

SELECTION CRITERIA

Randomised controlled trials (RCTs), cluster-RCTs, controlled before-and-after (CBA) studies (with at least two intervention and two control sites) and interrupted time series analysis (with at least three observations before and after the intervention) comparing: 1. non-medical prescribing versus medical prescribing in acute care; 2. non-medical prescribing versus medical prescribing in chronic care; 3. non-medical prescribing versus medical prescribing in secondary care; 4 non-medical prescribing versus medical prescribing in primary care; 5. comparisons between different non-medical prescriber groups; and 6. non-medical healthcare providers with formal prescribing training versus those without formal prescribing training.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures expected by Cochrane. Two review authors independently reviewed studies for inclusion, extracted data, and assessed study quality with discrepancies resolved by discussion. Two review authors independently assessed risk of bias for the included studies according to EPOC criteria. We undertook meta-analyses using the fixed-effect model where studies were examining the same treatment effect and to account for small sample sizes. We compared outcomes to a random-effects model where clinical or statistical heterogeneity existed.

MAIN RESULTS

We included 46 studies (37,337 participants); non-medical prescribing was undertaken by nurses in 26 studies and pharmacists in 20 studies. In 45 studies non-medical prescribing as a component of care was compared with usual care medical prescribing. A further study compared nurse prescribing supported by guidelines with usual nurse prescribing care. No studies were found with non-medical prescribing being undertaken by other health professionals. The education requirement for non-medical prescribing varied with country and location.A meta-analysis of surrogate markers of chronic disease (systolic blood pressure, glycated haemoglobin, and low-density lipoprotein) showed positive intervention group effects. There was a moderate-certainty of evidence for studies of blood pressure at 12 months (mean difference (MD) -5.31 mmHg, 95% confidence interval (CI) -6.46 to -4.16; 12 studies, 4229 participants) and low-density lipoprotein (MD -0.21, 95% CI -0.29 to -0.14; 7 studies, 1469 participants); we downgraded the certainty of evidence from high due to considerations of serious inconsistency (considerable heterogeneity), multifaceted interventions, and variable prescribing autonomy. A high-certainty of evidence existed for comparative studies of glycated haemoglobin management at 12 months (MD -0.62, 95% CI -0.85 to -0.38; 6 studies, 775 participants). While there appeared little difference in medication adherence across studies, a meta-analysis of continuous outcome data from four studies showed an effect favouring patient adherence in the non-medical prescribing group (MD 0.15, 95% CI 0.00 to 0.30; 4 studies, 700 participants). We downgraded the certainty of evidence for adherence to moderate due to the serious risk of performance bias. While little difference was seen in patient-related adverse events between treatment groups, we downgraded the certainty of evidence to low due to indirectness, as the range of adverse events may not be related to the intervention and selective reporting failed to adequately report adverse events in many studies.Patients were generally satisfied with non-medical prescriber care (14 studies, 7514 participants). We downgraded the certainty of evidence from high to moderate due to indirectness, in that satisfaction with the prescribing component of care was only addressed in one study, and there was variability of satisfaction measures with little use of validated tools. A meta-analysis of health-related quality of life scores (SF-12 and SF-36) found a difference favouring usual care for the physical component score (MD 1.17, 95% CI 0.16 to 2.17), but not the mental component score (MD 0.58, 95% CI -0.40 to 1.55). However, the quality of life measurement may more appropriately reflect composite care rather than the prescribing component of care, and for this reason we downgraded the certainty of evidence to moderate due to indirectness of the measure of effect. A wide variety of resource use measures were reported across studies with little difference between groups for hospitalisations, emergency department visits, and outpatient visits. In the majority of studies reporting medication use, non-medical prescribers prescribed more drugs, intensified drug doses, and used a greater variety of drugs compared to usual care medical prescribers.The risk of bias across studies was generally low for selection bias (random sequence generation), detection bias (blinding of outcome assessment), attrition bias (incomplete outcome data), and reporting bias (selective reporting). There was an unclear risk of selection bias (allocation concealment) and for other biases. A high risk of performance bias (blinding of participants and personnel) existed.

AUTHORS' CONCLUSIONS

The findings suggest that non-medical prescribers, practising with varying but high levels of prescribing autonomy, in a range of settings, were as effective as usual care medical prescribers. Non-medical prescribers can deliver comparable outcomes for systolic blood pressure, glycated haemoglobin, low-density lipoprotein, medication adherence, patient satisfaction, and health-related quality of life. It was difficult to determine the impact of non-medical prescribing compared to medical prescribing for adverse events and resource use outcomes due to the inconsistency and variability in reporting across studies. Future efforts should be directed towards more rigorous studies that can clearly identify the clinical, patient-reported, resource use, and economic outcomes of non-medical prescribing, in both high-income and low-income countries.

Impact of Platelet Functional Assays on the Cost of Treating Suspected Heparin-Induced Thrombocytopenia

Objectives:

To investigate the potential cost savings of using functional platelet assays to confirm the diagnosis of heparin-induced thrombocytopenia (HIT).

Methods:

This was a single-center study conducted in the United States. We performed a retrospective cost of illness analysis of suspected HIT, comparing patients with the serotonin release assay (SRA) ordered as part of their diagnostic evaluation to those who did not. The primary clinical end point was a composite of mortality and major bleed.

Results:

A total of 147 patients met the study’s inclusion criteria. An SRA was ordered in 53 patients of whom 17% were positive. Overall, SRA use did not reduce the composite primary clinical end point (32.1% vs 33%, P = .911). Also, there was no difference in the total cost of hospital stay (US $84781.1 vs US $78534.4, P = .409) nor in the direct medical costs related to HIT management (US $7473.5 vs US $8402.4, P = .393). Early ordering of the SRA (within 48 hours) was associated with shorter length of stay (20 vs 27 days, P = .029) but without a difference in cost of treatment.

Conclusion:

The use of SRA did not reduce the costs or improve clinical outcomes in patients with suspected HIT.

Pharmacist contributions as members of the multidisciplinary ICU team

Critical care pharmacy services in the ICU have expanded from traditional dispensing responsibilities to being recognized as an essential component of multidisciplinary care for critically ill patients. Augmented by technology and resource utilization, this shift in roles has allowed pharmacists to provide valuable services in the form of assisting physicians and clinicians with pharmacotherapy decision-making, reducing medication errors, and improving medication safety systems to optimize patient outcomes. Documented improvements in the management of infections, anticoagulation therapy, sedation, and analgesia for patients receiving mechanical ventilation and in emergency response help to justify the need for clinical pharmacy services for critically ill patients. Contributions to quality improvement initiatives, scholarly and research activities, and the education and training of interdisciplinary personnel are also valued services offered by clinical pharmacists. Partnering with physician and nursing champions can garner support from hospital administrators for the addition of clinical pharmacy critical care services. The addition of a pharmacist to an interprofessional critical care team should be encouraged as health-care systems focus on improving the quality and efficiency of care delivered to improve patient outcomes.

The impact of pharmacist-directed patient education and anticoagulant care coordination on patient satisfaction

BACKGROUND

Patient satisfaction data played a role in determining Medicare reimbursement as of October 2012. Clinical pharmacy services could improve satisfaction of hospital inpatients but it is unclear whether this relates to performance on standardized hospital surveys.

OBJECTIVE

To describe the impact on patient satisfaction of patient education and follow-up care coordination provided by an inpatient pharmacist-directed anticoagulation service (PDAS).

METHODS

This study was conducted at an urban, tertiary care hospital. PDAS is a clinical pharmacy service that has improved transition-of-care, safety, and efficacy involving anticoagulation at our institution. Patients receiving inpatient anticoagulation during February 2001-April 2007 (pre-PDAS) and December 2008-December 2010 (post-PDAS), who responded to a mail-in survey, were included. Survey items included satisfaction ("How satisfied were you with the medical care?"), amount of information ("Was the amount of information you received about your medicine...?"), clarity of information ("Was the clarity of the information about your medicine...?"), answer quality ("Were the answers to your questions about your medicine...?"), and spoke to a pharmacist ("Did a pharmacist speak with you during your stay?"). Response options for amount of information, clarity of information, answer quality, and satisfaction used a symmetric 5-point Likert-type scale, with options 1-5 indicating most to least positive, respectively. Options 1-2 were considered positive and options 3-5 were considered negative. Primary analysis compared patient satisfaction (defined as rate of positive responses) between pre-PDAS and post-PDAS respondents. χ² test was used for all comparisons.

RESULTS

Surveys were distributed to 1694 patients after discharge, with 687 (40.6%) responding. Post-PDAS respondents had improved patient satisfaction for all positive response items, compared to pre-PDAS scores. Amount of information increased by 37.2%, clarity of information increased by 35.2%, answer quality increased by 29.5%, and satisfaction increased by 10.6% (p < 0.001 for all comparisons).

CONCLUSIONS

Hospitals deploying focused programs with systematic approaches to patient-pharmacist communication may positively impact patient satisfaction.

Safety and effectiveness outcomes of an inpatient collaborative drug therapy management service for direct thrombin inhibitors

PURPOSE

The impact of a collaborative drug therapy management (CDTM) agreement enabling pharmacist-managed direct thrombin inhibitor (DTI) therapy was evaluated.

METHODS

A retrospective chart review was conducted to compare selected outcome measures between cohorts of adults who received argatroban or bivalirudin therapy for suspected heparin-induced thrombocytopenia (HIT) before (n = 25) and after (n = 25) the implementation of an institutional DTI protocol under which properly trained and credentialed pharmacists have a primary role in dosing and monitoring DTI infusions. The primary endpoints were the mean time to attainment of activated partial thromboplastin time (aPTT) values in a specified therapeutic range and the proportion of total inpatient treatment time during which aPTT values were in that range. Secondary endpoints included the incidence of major and minor bleeding and the incidence of medication errors.

RESULTS

After implementation of the DTI protocol, therapeutic aPTT values were achieved more rapidly (a mean of 3.4 hours in the postimplementation cohort versus a mean of 7.7 hours in the preimplementation cohort, p = 0.009) and maintained more consistently. Rates of bleeding and overall mortality were similar in the two groups; the frequencies of documented medication errors were 12% and 40% in the postimplementation and preimplementation cohorts, respectively (p = 0.05).

CONCLUSION

A pharmacist-driven DTI program resulted in improved effectiveness and safety outcomes, as demonstrated by improved attainment of target aPTT values and a decreased frequency of medication errors.

2011 John M. Eisenberg Patient Safety and Quality Awards. The Henry Ford Health System No Harm Campaign: a comprehensive model to reduce harm and save lives. innovation in patient safety and quality at the local level

BACKGROUND

In 2008 Henry Ford Health System launched its "No Harm Campaign," designed to integrate harm-reduction interventions into a systemwide initiative and, ultimately, to eliminate harm from the health care experience.

METHODS

The No Harm Campaign aims to decrease harm events through enhancing the system's culture of safety by reporting and studying harm events, researching causality, identifying priorities, and redesigning care to eliminate harm. The campaign uses a comprehensive set of 27 measures for harm reduction, covering infection-, medication-, and procedure-related harm, as well as other types of harm, all of which are combined to comprise a unique global harm score. The campaign's objective is to reduce all-cause harm events systemwide by 50% by 2013. A wide range of communication processes, from systemwide leadership retreats to daily e-mail news sent to all employees and physicians, is used to promote the campaign. In addition, the campaign is on the intranet "Knowledge Wall," where monthly dashboards, meeting minutes, and best practices and the work of our teams and collaboratives are documented and shared.

RESULTS

From 2008 through 2011, a 31% reduction in harm events and an 18% reduction in inpatient mortality occurred systemwide.

DISCUSSION

Building infrastructure, creating a culture of safety, providing employee training and education, and improving work process design are critical to systemwide implementation of harm-reduction efforts. Key actions for ongoing success focus on leadership, disseminating performance, putting everyone to work, and stealing ideas through national and local collaborations. A financial model was created to assess cost-savings of reducing harm events; early results total nearly $10 million in four years.

How I treat heparin-induced thrombocytopenia

Heparin-induced thrombocytopenia is a prothrombotic adverse drug effect induced by platelet-activating antibodies against multimolecular complexes of platelet factor 4 and heparin. Diagnosis rests on a clinical assessment of disease probability and laboratory testing. Management involves immediate discontinuation of heparin and initiation of an alternative anticoagulant. Because of the frequency of thrombocytopenia among heparinized patients, the limited specificity of widely available immunoassays, the limited availability of more specific functional assays, and clinicians' fears of missing a case of true disease, overtesting, overdiagnosis, and overtreatment have become common. As a result, a substantial number of thrombocytopenic patients are unnecessarily exposed to costly alternative anticoagulants and their attendant risk of bleeding. In this review, we describe not only our approach to the evaluation and management of patients with heparin-induced thrombocytopenia, but also the measures we use to minimize misdiagnosis and unnecessary treatment of patients without the disease. In addition, we propose areas of investigation for improvement of the diagnosis and management of this potentially fatal disorder.