Treatment and prevention of pain due to vaso-occlusive crises in adults with sickle cell disease: an educational void. Blood. 2008;111:997-1003. [PMID: 17940207 DOI: 10.1182/blood-2007-07-089144]

Patient Perspectives of Sickle Cell Management in the Emergency Department

Sickle cell disease (SCD) is a common genetic blood disorder predominantly affecting African Americans in the United States. The objective of this study was to use a multimethods approach to describe how patients with SCD in North Carolina perceive the care they receive in emergency departments (EDs). Fourteen participants completed an interview (n = 10) or 2 focus groups (n = 2 per focus group) and 51 completed surveys. Sixty percent of participants with pain attack "very much" or "quite a bit" avoided going to the ED for care because of prior bad experiences and 50% of participants reported waiting 120 minutes or more in the ED for treatment of their sickle cell pain. Participants reported that stigma associated with provider perception of drug-seeking behavior is a persistent problem in the ED. Participant recommendations warrant further investigation to address persistent SCD quality-of-care concerns in the ED.

Outcomes of an Emergency Department Observation Unit-Based Pathway for the Treatment of Uncomplicated Vaso-occlusive Events in Sickle Cell Disease

STUDY OBJECTIVE

This was a prospective, pre-post, 13-year observational study documenting the multiyear implementation of an observation unit sickle cell pathway for patients with uncomplicated vaso-occlusive events.

METHODS

The sickle cell pathway begins with rapid triage to identify patients with uncomplicated vaso-occlusive events for immediate transfer to the observation unit and initiation of patient-controlled analgesia followed by repeated evaluations of pain and identification of other complications. Data were abstracted from the electronic medical record or observation unit database. The sickle cell pathway was initiated in April 2006. Major revisions of it were carried out in June 2009 (physician evaluation occurs in sickle cell pathway and only patient-controlled analgesia administration of medications) and October 2010 (multidisciplinary management and individual dosing).

RESULTS

Annual ED visits ranged between 287 and 528. The preimplementation hospital admission rate was 33% (123/368), 3-day return rate 16% (60/368), and 30-day return rate 67% (248/368). Refinements to the sickle cell pathway have resulted in a decrease in admission rate to 20% (258/1276); 3-day return rate, to 3.6% (46/1,276); and 30-day return rate, to 41% (525/1,276) for the past 3 years.

CONCLUSION

The use of a sickle cell pathway for the treatment of uncomplicated vaso-occlusive events has been effective in providing rapid treatment and reducing hospital admissions. However, it was not only the intervention and its refinement that made the sickle cell pathway successful. With the Consolidated Framework for Implementation Research, it was discerned that outer setting factors of organizational commitment to the care of patients with SCD, inner setting factors of learning climate and leadership engagement, individuals, and process contributed to the success of the sickle cell pathway.

Microvascular thrombosis: experimental and clinical implications

A significant amount of clinical and research interest in thrombosis is focused on large vessels (eg, stroke, myocardial infarction, deep venous thrombosis, etc.); however, thrombosis is often present in the microcirculation in a variety of significant human diseases, such as disseminated intravascular coagulation, thrombotic microangiopathy, sickle cell disease, and others. Further, microvascular thrombosis has recently been demonstrated in patients with COVID-19, and has been proposed to mediate the pathogenesis of organ injury in this disease. In many of these conditions, microvascular thrombosis is accompanied by inflammation, an association referred to as thromboinflammation. In this review, we discuss endogenous regulatory mechanisms that prevent thrombosis in the microcirculation, experimental approaches to induce microvascular thrombi, and clinical conditions associated with microvascular thrombosis. A greater understanding of the links between inflammation and thrombosis in the microcirculation is anticipated to provide optimal therapeutic targets for patients with diseases accompanied by microvascular thrombosis.

Utilization, financial outcomes and stakeholder perspectives of a re-organized adult sickle cell program

In 2011 Yale New Haven Hospital, in response to high utilization of acute care services and widespread patient and health care personnel dissatisfaction, set out to improve its care of adults living with sickle cell disease. Re-organization components included recruitment of additional personnel; re-locating inpatients to a single nursing unit; reducing the number of involved providers; personalized care plans for pain management; setting limits upon access to parenteral opioids; and an emphasis upon clinic visits focused upon home management of pain as well as specialty and primary care. Outcomes included dramatic reductions in inpatient days (79%), emergency department visits (63%), and hospitalizations (53%); an increase in outpatient visits (31%); and a decrease in costs (49%). Providers and nurses viewed the re-organization and outcomes positively. Most patients reported improvements in pain control and life style; many patients thought the re-organization process was unfair. Their primary complaint was a lack of shared decision-making. We attribute the contrast in these perspectives to the inherent difficulties of managing recurrent acute and chronic pain with opioids, especially within the context of the imbalance in wellness, power, and privilege between persons living with sickle cell disease, predominantly persons of color and poor socio-economic status, and health care organizations and their personnel.

Clinical Impact of Warmed Intravenous Saline in Sickle Cell Patients With Vasoocclusive Episodes

OBJECTIVES

In children with sickle cell disease treated for vasoocclusive episodes (VOEs), it is unknown if the temperature of infused fluids impacts clinical outcomes. We compared infusions of warmed and nonwarmed saline for treatment of VOE. We also assessed the tolerability and feasibility of infusing warmed saline in patients with VOEs.

METHODS

Patients aged 4 to 21 years with sickle cell disease presenting to the emergency department with VOE were randomized to infusions of warmed (37.5°C, experimental arm) versus nonwarmed (22°C-24°C, controls) saline. Intravenous opioids were administered according to previously established guidelines. We compared hospital admission rates, pain scores, disposition times, dosages of opioid, and comfort.

RESULTS

Eighty of 92 visits were eligible (40 per arm). The mean age of enrollees was 14 years, and 53% were female. Hospital admission rates were comparable (63% experimental arm and 55% control arm, P = 0.5). Pain score reduction (-2.9 and -2.6, P = 0.52), median morphine equivalents (0.23 mg/kg and 0.25 mg/kg, P = 0.58), and mean treatment-to-disposition times (158 minutes and 155 minutes, P = 0.85) were also similar. Global comfort was higher in children who received warmed saline (4 vs 3, P = 0.01). There were no adverse events reported in patients who received warmed saline.

CONCLUSIONS

It is feasible and tolerable to infuse warmed saline for the treatment of VOE, and it is well tolerated. Patient comfort was higher in those patients who received warmed saline, but there was no improvement in admission rates, disposition times, pain scores, and opioid dosages.

Increased acute care utilization in a prospective cohort of adults with sickle cell disease

The ESCAPED (Examining Sickle Cell Acute Pain in the Emergency vs Day Hospital) trial is an ongoing prospective study comparing outcomes of people with sickle cell disease (SCD) seeking care for acute pain management in either an emergency department or specialty infusion clinic. The objective of this paper is to describe the baseline characteristics and health care utilization of patients in the trial. This is a multicenter study across 4 US cities that enrolled all adults with SCD living within 60 miles (96.6 km) of a study site who were expected to have acute care utilization over the study period. Twenty-one percent of participants had no acute care visits in the first 12 months of follow-up. Using negative binomial regression, we describe subject characteristics that predict acute care utilization. Three hundred ninety-one subjects have completed 12 months of follow-up with a mean age of 34.5 years (standard deviation, 11.4), 60% are female. Fifty-four percent of subjects with hemoglobin SS disease and 46% with hemoglobin SC disease had 3 or more acute visits over the study period. The prevalence of chronic pain in this cohort was 68%. Predictors of higher rates of acute care utilization included being unemployed, having chronic pain, being on chronic transfusion therapy, having a history of stroke, and being on disability or on Medicaid. This is the first prospective cohort in the modern era, and it demonstrates much higher rates of acute care utilization than reported in the Cooperative Study of Sickle Cell Disease.

Thyroid hemodynamic alterations in Egyptian patients with sickle cell disease: relation to disease severity, total body iron and thyroid function

Background: Intraparenchymal thyroid Doppler measurements might be considered a useful index of the thyroid status as well as micro-circulation elsewhere in the body among sickle cell disease (SCD) patients. The authors aim to evaluate the intra-thyroidal hemodynamic changes and thyroidal volume in SCD patients and its relation to the disease severity, and thyroid functions tests as well as iron overload state. Methods: Sixty SCD patients, randomly recruited from the regular attendants of the Pediatric Hematology Clinic, Ain Shams University, Cairo, Egypt, were studied focusing on the disease duration, the transfusion history, the recorded Hydroxyurea, and chelation therapies and the vaso-occlusive crises history. Thyroid Doppler ultrasonography [Thyroid volume, Resistance index (RI) and pulsatility index (PI)] was performed and liver & cardiac MRI were assessed. Results: Thirteen (21.7%) of the SCD patients had hypothyroidism by thyroid function tests. SCD patients had significantly higher RI and PI values and a lower thyroid volume compared to the control group. No significant correlations were found between the thyroid functions tests and the thyroid Doppler parameters; a negative correlation of the disease duration to the thyroid volume and a positive one to RI & PI values were found. The mean serum ferritin did not significantly correlate to the thyroid Doppler indices nor did Liver and cardiac MRI results. Conclusion: The authors demonstrated an increased intra-thyroidal RI & PI and a decreased thyroid volume among SCD patients which might be related to impaired thyroidal microcirculation and vasculopathy rather than iron overload.

A Qualitative Study of Chronic Pain and Self-Management in Adults with Sickle Cell Disease

Acute, intermittent vaso-occlusive pain is the hallmark of sickle cell disease (SCD) and is associated with substantial morbidity and impaired quality of life (QOL). The subgroup of adults with SCD who transition from recurrent, acute pain to chronic, persistent pain have even greater QOL impairment and higher rates of healthcare utilization. Self-management is central to SCD management; however, its role in chronic pain management is not established. This qualitative study was conducted to answer the following research questions: (1) What is the chronic pain experience of adults with SCD? (2) What self-management strategies do adults with SCD use for chronic pain? and (3) Do adults with SCD have any needs in the self-management of chronic pain? Eighteen Black adults with SCD completed a demographics questionnaire and an interview. The majority of the participants were 21-30 years of age (mean 33.5, SD 7.6), female (61.1%), employed at least part-time (61.1%), single/never married (72.2%), and had a SCD type of sickle cell anemia (55.5%). Interview analysis revealed three major themes: (1) the chronic pain experience; (2) strategies for managing chronic pain; and (3) challenges and needs in managing chronic pain. Study findings can be used to support chronic pain management among adults with SCD. Further research is needed to devise and implement effective strategies for the prevention and management of chronic SCD pain.

Five lessons learned about long-term pain management in adults with sickle cell disease

Chronic pain affects one-half of adults with sickle cell disease (SCD). Despite the prevalence of chronic pain, few studies have been performed to determine the best practices for this patient population. Although the pathophysiology of chronic pain in SCD may be different from other chronic pain syndromes, many of the guidelines outlined in the pain literature and elsewhere are applicable; some were consensus-adopted in the 2014 National Heart, Lung, and Blood Institute SCD Guidelines. Recommended practices, such as controlled substance agreements and monitoring of urine, may seem unnecessary or counterproductive to hematologists. After all, SCD is a severe pain disorder with a clear indication for opioids, and mistrust is already a major issue. The problem, however, is not with a particular disease but with the medicines, leading many US states to pass broad legislation in attempts to curb opioid misuse. These regulations and other key tenets of chronic pain management are not meant to deprive adults with SCD of appropriate therapies, and their implementation into hematology clinics should not affect patient-provider relationships. They simply encourage prudent prescribing practices and discourage misuse, and should be seen as an opportunity to more effectively manage our patient's pain in the safest manner possible. In line with guideline recommendations as well as newer legislation, we present five lessons learned. These lessons form the basis for our model to manage chronic pain in adults with SCD.

Opioid prescription practices at discharge and 30-day returns in children with sickle cell disease and pain

BACKGROUND

Acute pain episodes in children with sickle cell disease (SCD) represent a leading cause of readmissions. We examined prescription practices at the time of discharge in children with SCD presenting with acute pain to determine their impact on 30-day emergency department (ED) revisits and readmissions.

METHODS

In this single-institution, 5-year retrospective study, we reviewed 290 encounters of patients with SCD aged 7-21 years hospitalized or discharged from the ED with acute pain. We reviewed demographic, treatment and discharge data, and 30-day returns, defined as ED revisits and readmissions within 30 days of discharge. Bivariate and multivariable analyses were performed to evaluate the association between discharge prescription practices and 30-day returns.

RESULTS

Compared to hospitalizations, treat-and-release ED visits for acute pain were associated with a higher incidence of 30-day returns (OR = 2.7 [95% CI: 1.5-4.8], P < 0.01). We found no association between prescribed opioid frequency (scheduled vs. as-needed) and 30-day returns (OR = 1.12 [95% CI: 0.62-2.02], P = 0.70). By multivariable logistic regression, the prescription of nonsteroidal anti-inflammatory drugs (NSAIDs) only, without opioids, after treat-and-release ED visits was independently associated with a higher frequency of 30-day ED revisits (OR = 6.9 [95% CI: 1.3-37.3], P = 0.03) but not readmissions.

CONCLUSION

Variability exists in opioid prescription practices after discharge in children with SCD and pain episodes. Prescription of NSAIDs only, without opioids, was an independent predictor of higher 30-day ED revisits. Formalized studies to better understand factors that influence returns, including outpatient opioid management, are warranted in this population.

Sickle cell disease in adults: developing an appropriate care plan

BACKGROUND

Sickle cell disease (SCD) is primarily characterized by pain. This chronic pain with acute exacerbations is the most common reason for hospital visits, admissions, and readmissions, particularly in young adults (aged 18–39 years). People who present to the hospital for pain crises often report that nurses lack knowledge of SCD and, consequently, they do not provide appropriate, timely care.

OBJECTIVES

Because pain episodes often result in hospital admissions, this article highlights prominent issues that staff nurses need to know.

METHODS

Using a review of the literature and case studies, the authors provide recommendations to improve care of adults with SCD.

FINDINGS

No objective signs of a sickle cell pain crisis exist. Patients react to pain in different ways and use various coping mechanisms in response. Suspected opioid addiction should not affect the provision of nursing care. Pain must be treated appropriately to decrease the potential for prolonged admissions and/or readmissions. Patients are to be acknowledged as experts and collaborated with in developing an appropriate plan of care. Advocacy on behalf of the patient is important for better communication with providers. With this knowledge, nurses will be better equipped to provide the appropriate and timely care required to manage pain crises experienced by individuals living with SCD.

Shift in Emergency Department Provider Attitudes Toward Patients With Sickle Cell Disease

Patients with sickle cell disease frequently seek care in the emergency department. They have reported experiencing negative attitudes from emergency providers. This study was undertaken to evaluate change in emergency provider attitudes toward patients with sickle cell disease over a 2.5-year time period when several educational efforts were ongoing. The General Perceptions about Sickle Cell Disease Patients Scale was used to measure emergency provider attitudes at 2 emergency departments at baseline, 6 months, and 30 months into the project. Analyses of covariance were used to test for effects of site, time, and provider type, as well as their interactions, on Negative attitudes, Uneasiness With Care, and Positive Attitudes subscale scores, after controlling for years of provider experience. The number of surveys returned at the 3 time points was 216, 182, and 113, respectively. The mean Negative Attitudes subscale scores decreased significantly over time, with significantly higher mean Negative Attitudes subscale scores reported by nurses than by physicians. The mean Uneasiness With Care subscale scores did not differ significantly over time, but the mean score was significantly higher for physicians than for nurses. The mean Positive Attitudes subscale scores significantly improved over time, with physicians tending to have a higher mean Positive Attitudes subscale scores than nurses. During the observation period, there was improvement in attitudes, with a decline in mean Negative Attitudes subscale scores and increase in mean Positive Attitudes subscale scores. Physicians reported better attitudes than nurses.

Novel insights in the management of sickle cell disease in childhood

Sickle cell disease (SCD) is a life-threatening genetic disorder characterized by chronic hemolytic anemia, vascular injury and multiorgan dysfunctions. Over the last few decades, there have been significant improvements in SCD management in Western countries, especially in pediatric population. An early onset of prophylaxis with Penicillin and a proper treatment of the infections have increased the overall survival in childhood. Nevertheless, management of painful episodes and prevention of organ damage are still challenging and more efforts are needed to better understand the mechanisms behind the development of chronic organ damages. Hydroxyurea (Hydroxycarbamide, HU), the only medication approved as a disease-modifying agent by the United States Food and Drug Administration and the European Medicines Agency, is usually under-used, especially in developing countries. Currently, hematopoietic stem-cell transplantation is considered the only curative option, although its use is limited by lack of donors and transplant-related toxicity. SCD symptoms are similar in children and adults, but complications and systemic organ damages increase with age, leading to early mortality worldwide. Experts in comprehensive care of young patients with SCD, especially those approaching the transition age to adulthood, are missing, leading people to rely on urgent care, increasing health care utilization costs and inappropriate treatments. It would be important to establish programs of comprehensive healthcare for patients with SCD from birth to adulthood, to improve their quality and expectancy of life.

Educational intervention to improve the health outcomes of children with sickle cell disease

INTRODUCTION

Although sickle cell disease (SCD) is the most common single gene disorder worldwide, caregivers of children do not have adequate knowledge about the illness and its management. The purpose of this study was to assess the efficacy of education along with tailored written materials in changing the behaviors of caregivers to help them provide better care for children with SCD.

METHODS

A preintervention and postintervention quasi-experimental design was used. A convenience sample of 43 caregivers of 57 children were asked to complete a questionnaire related to their knowledge of SCD before and after educational sessions. The educational sessions (the intervention) were provided to caregivers at the Children's Cancer Center in Lebanon by one registered nurse, one certified pediatric nurse practitioner, and one pediatric hematologist. Emergency department (ED) visits and hospitalizations were compared 2 months before and 2 months after the intervention.

RESULTS

A statistically significant increase was found in the knowledge of caregivers about the cause, symptoms, and management of the disease. A statistically significant decrease occurred in the number of hospitalizations before and after the intervention but not in the number of visits to the ED. Multiple regression analysis found that none of the background variables were related to knowledge, ED visits, or hospitalizations.

CLINICAL IMPLICATIONS

Education and written materials written in a simple language that is understood by 5th-graders were beneficial in improving the knowledge of caregivers and in decreasing the number of hospitalizations of children with SCD.

An unequal burden: poor patient-provider communication and sickle cell disease

OBJECTIVE

To assess disparities in the quality of healthcare provider communication experienced by African-American adults with and without sickle cell disease (SCD) in the U.S.

METHODS

Poor provider communication was assessed by the Provider Communication subscale of the Consumer Assessment of Healthcare Plans and Systems survey. The SCD sample was obtained from participants in a multicenter observational study of healthcare experiences. The national African-American sample data was obtained from published national estimates.

RESULTS

The SCD sample was more likely than the national sample to report poor communication in 3 out of 4 communication domains: listening (22.3% vs. 11.5%, p<0.0001); showing respect (26.1% vs. 9.5%, p<0.0001); and spending enough time (38.3% vs. 16.2%, p<0.0001). Differences were consistent in young, but not old, patients and showed some variation by self-reported health status and education.

CONCLUSIONS

The communication difficulties experienced by persons with SCD do not appear reducible to their predominantly African-American race, but may result from more disease-specific factors.

PRACTICE IMPLICATIONS

Healthcare providers should take particular care in recognizing and demonstrating recommended communication skills with SCD patients as these patients may be particularly vulnerable to, and cognizant of, poor quality interactions.

Use of a clinical pathway to improve the acute management of vaso-occlusive crisis pain in pediatric sickle cell disease

BACKGROUND

The most common, debilitating morbidity of sickle cell disease (SCD) is vaso-occlusive crisis (VOC) pain. Although guidelines exist for its management, they are generally not well-followed, and research in other pediatric diseases has shown that clinical pathways improve care. The purpose of our study was to determine whether a clinical pathway improves the acute management of sickle cell vaso-occlusive crisis (VOC) pain in the pediatric emergency department (PED).

PROCEDURE

Pain management practices were prospectively investigated before and after the initiation of a clinical pathway in the PED of an urban, tertiary care center with 50,000 ED visits per year and approximately 200 active sickle cell patients. The pathway included instructions for triage, monitoring, medication administration, and timing of assessments and interventions. Data were eligible from 35 pre-pathway and 33 post-pathway visits. Primary outcome was time interval to administration of first analgesic medication. Statistical analysis was by Student's t-test, using natural-log-transformed data for outcomes with skewed distribution curves.

RESULTS

Time interval to first analgesic improved from 74 to 42 minutes (P = 0.012) and to first opioid from 94 to 46 minutes (P = 0.013). The percentage of patients who received ketorolac increased from 57% to 82% (P = 0.03). Decrease in time interval to subsequent pain score assessment was not statistically significant (110 to 72 minutes (P = 0.07)), and change in pain score was not different (P = 0.25).

CONCLUSIONS

The use of a clinical pathway for sickle cell VOC in the PED can improve important aspects of pain management and merits further investigation and implementation.

Sickle cell disease pain management and the medical home

Pain is the most common cause for hospitalization and acute morbidity in sickle cell disease (SCD). The consequences of SCD-related pain are substantial, affecting both the individual and the health care system. The emergence of the patient-centered medical home (PCMH) provides new opportunities to align efforts to improve SCD management with innovative and potentially cost-effective models of patient-centered care. The Department of Health and Human Services has designated SCD as a priority area with emphasis on creating PCMHs for affected patients. The question for patients, clinicians, scientists, and policy-makers is how the PCMH can be designed to address pain, the hallmark feature of SCD. This article provides a framework of pain management within the PCMH model. We present an overview of pain and pain management in SCD, gaps in pain management, and current care models used by patients and discuss core PCMH concepts and multidisciplinary team–based PCMH care strategies for SCD pain management.

Management of sickle cell disease from childhood through adulthood

Sickle cell disease (SCD) is a genetic disorder characterised by anaemia and "sickling" of red blood cells, leading to chronic haemolytic anaemia, vascular injury, and organ dysfunction. Although children and adults experience many similar symptoms and problems, complications increase with age, leading to early mortality. Hydroxyurea (hydroxycarbamide), the only US Food and Drug Administration-approved treatment, continues to be under-utilised and other treatments available to children are often inaccessible for adults. Haematopoietic stem-cell transplantation is a curative option, but is limited by a lack of donors and concerns for transplant-related toxicities. Although comprehensive programs exist in paediatrics, affected adults may not have access to preventative and comprehensive healthcare because of a lack of providers or care coordination. They are often forced to rely on urgent care, leading to increased healthcare utilisation costs and inappropriate treatment. This problem highlights the importance of primary care during the transition from paediatrics to adulthood.

Current management of sickle cell anemia

Proper management of sickle cell anemia (SCA) begins with establishing the correct diagnosis early in life, ideally during the newborn period. The identification of affected infants by neonatal screening programs allows early initiation of prophylactic penicillin and pneumococcal immunizations, which help prevent overwhelming sepsis. Ongoing education of families promotes the early recognition of disease-released complications, which allows prompt and appropriate medical evaluation and therapeutic intervention. Periodic evaluation by trained specialists helps provide comprehensive care, including transcranial Doppler examinations to identify children at risk for primary stroke, plus assessments for other parenchymal organ damage as patients become teens and adults. Treatment approaches that previously highlighted acute vaso-occlusive events are now evolving to the concept of preventive therapy. Liberalized use of blood transfusions and early consideration of hydroxyurea treatment represent a new treatment paradigm for SCA management.

Emergency provider analgesic practices and attitudes toward patients with sickle cell disease

STUDY OBJECTIVE

We determine whether emergency provider attitudes and demographics are associated with adherence to national guidelines for the management of acute sickle cell disease pain.

METHODS

We conducted a cross-sectional survey of emergency providers at the 2011 annual American College of Emergency Physicians Scientific Assembly, using a validated instrument to assess provider attitudes and self-reported analgesic practices toward patients with sickle cell disease. Multivariable, relative risk regressions were used to identify factors associated with adherence to guidelines.

RESULTS

There were 722 eligible participants, with a 93% complete response rate. Most providers self-reported adherence to the cornerstones of sickle cell disease pain management, including parenteral opioids (90%) and redosing opioids within 30 minutes if analgesia is inadequate (85%). Self-reported adherence was lower for other recommendations, including use of patient-controlled analgesia, acetaminophen, non-steroidal anti-inflammatory drugs and hypotonic fluids for euvolemic patients. Emergency providers in the highest quartile of negative attitudes were 20% less likely to redose opioids within 30 minutes for inadequate analgesia (risk ratio 0.8; 95% confidence interval [CI] 0.7 to 0.9). High-volume providers (those who treat more than 1 sickle cell disease patient per week), were less likely to redose opioids within 30 minutes for inadequate analgesia (risk ratio 0.9; 95% CI 0.8 to 0.9). Pediatric providers were 6.6 times more likely to use patient-controlled analgesia for analgesia (95% CI 2.6 to 16.6).

CONCLUSION

The majority of emergency providers report that they adhere to national guidelines about use of opioids for sickle cell disease-related acute pain episodes. Other recommendations have less penetration. Negative attitudes toward individuals with sickle cell disease are associated with lower adherence to guidelines.

Sickle cell disease pain management and the medical home

Pain is the most common cause for hospitalization and acute morbidity in sickle cell disease (SCD). The consequences of SCD-related pain are substantial, affecting both the individual and the health care system. The emergence of the patient-centered medical home (PCMH) provides new opportunities to align efforts to improve SCD management with innovative and potentially cost-effective models of patient-centered care. The Department of Health and Human Services has designated SCD as a priority area with emphasis on creating PCMHs for affected patients. The question for patients, clinicians, scientists, and policy-makers is how the PCMH can be designed to address pain, the hallmark feature of SCD. This article provides a framework of pain management within the PCMH model. We present an overview of pain and pain management in SCD, gaps in pain management, and current care models used by patients and discuss core PCMH concepts and multidisciplinary team-based PCMH care strategies for SCD pain management.

Intranasal fentanyl versus intravenous morphine in the emergency department treatment of severe painful sickle cell crises in children: study protocol for a randomised controlled trial

BACKGROUND

Children with sickle cell disease (SCD) frequently and unpredictably present to the emergency department (ED) with pain. The painful event is the hallmark acute clinical manifestation of SCD, characterised by sudden onset and is usually bony in origin. This study aims to establish if 1.5mcg/kg of intranasal fentanyl (INF; administered via a Mucosal Atomiser Device, MAD™) is non-inferior to intravenous morphine 0.1 mg/kg in severe SCD-associated pain.

METHODS/DESIGN

This study is a randomised,double-blind, double-dummy active control trial of children (weighing more than 10 kg) between 1 year and 21 years of age with severe painful sickle cell crisis. Severe pain is defined as rated seven or greater on a 0 to 10 age-appropriate numeric pain scale or equivalent. The trial will be conducted in a single tertiary urban paediatric ED in Dublin, Ireland. Each patient will receive a single active agent and a single placebo via the intravenous and intranasal routes. All clinical and research staff, patients and parents will be blinded to the treatment allocation. The primary endpoint is severity of pain scored at 10 min from administration of the study medications. Secondary endpoints include pain severity measured at 0, 5, 15, 20, 30, 60 and 120 min after the administration of analgesia, proportion of patients requiring rescue analgesia and incidence of adverse events. The trial ends at 120 min after the administration of the study drugs. A clinically meaningful difference in validated pain scores has been defined as 13 mm. Setting the permitted threshold to 50% of this limit (6 mm) and assuming both treatments are on average equal, a sample size of 30 patients (15 per group) will provide at least 80% power to demonstrate that INF is non-inferior to IV morphine with a level of significance of 0.05.

DISCUSSION

This clinical trial will inform of the role of INF 1.5mcg/kg via MAD in the acute treatment of severe painful sickle cell crisis in children in the ED setting.

TRIAL REGISTRATION

Current Controlled Trials ISRCTN67469672 and EudraCT no. 2011-005161-20.

Pharmacokinetics, pharmacodynamics, and pharmacogenetics of hydroxyurea treatment for children with sickle cell anemia

Hydroxyurea therapy has proven laboratory and clinical efficacies for children with sickle cell anemia (SCA). When administered at maximum tolerated dose (MTD), hydroxyurea increases fetal hemoglobin (HbF) to levels ranging from 10% to 40%. However, interpatient variability of percentage of HbF (%HbF) response is high, MTD itself is variable, and accurate predictors of hydroxyurea responses do not currently exist. HUSTLE (NCT00305175) was designed to provide first-dose pharmacokinetics (PK) data for children with SCA initiating hydroxyurea therapy, to investigate pharmacodynamics (PD) parameters, including HbF response and MTD after standardized dose escalation, and to evaluate pharmacogenetics influences on PK and PD parameters. For 87 children with first-dose PK studies, substantial interpatient variability was observed, plus a novel oral absorption phenotype (rapid or slow) that influenced serum hydroxyurea levels and total hydroxyurea exposure. PD responses in 174 subjects were robust and similar to previous cohorts; %HbF at MTD was best predicted by 5 variables, including baseline %HbF, whereas MTD was best predicted by 5 variables, including serum creatinine. Pharmacogenetics analysis showed single nucleotide polymorphisms influencing baseline %HbF, including 5 within BCL11A, but none influencing MTD %HbF or dose. Accurate prediction of hydroxyurea treatment responses for SCA remains a worthy but elusive goal.

Increased clearance of morphine in sickle cell disease: implications for pain management

Acute vaso-occlusive painful episodes associated with sickle cell disease (SCD) are frequently treated with morphine. Many SCD individuals require relatively higher doses of morphine to achieve optimal analgesia. We studied pharmacokinetics of morphine in SCD to explore if altered disposition could be a factor contributing to increased requirement of morphine in this population. The study subjects were in steady state of health to avoid the effect of hemodynamic changes associated with vaso-occlusion on morphine disposition. The plasma concentrations of morphine and its major metabolites were measured at timed intervals in 21 SCD subjects after they received a single .1 mg/Kg infusion of morphine sulfate. USCPACK software was used to fit candidate pharmacokinetic models. Noncompartmental pharmacokinetic parameters for morphine were calculated. Morphine clearance was 2.4-3.6 L/h, half-life was .3-.7 hours, AUC(0-∞) was 27.7-42.5 ng∗h/mL, and volume of distribution was .96-3.38 L/kg. Clearance of morphine in the study population was 3-10 folds higher than published estimates in the non-SCD population, with correspondingly lower AUC and half-life. Volume of distribution was similar. This observation suggests that due to increased clearance SCD individuals may require higher dose and frequency of morphine to achieve comparable plasma levels.

PERSPECTIVE

Accelerated clearance of morphine likely related to increased hepatic and renal blood flow may be responsible for increased requirement of morphine in SCD. Although SCD individuals may require higher and more frequent doses of morphine, inter-individual variability of morphine disposition highlights the importance of individualization of the therapy.

Hydroxyurea and acute painful crises in sickle cell anemia: effects on hospital length of stay and opioid utilization during hospitalization, outpatient acute care contacts, and at home

CONTEXT

Exploratory findings from the randomized, double-blind, placebo-controlled, multicenter study of hydroxyurea (MSH) in sickle cell anemia (SS). Recurrent acute painful crises may be mild, moderate, or severe in nature and often require treatment at home, in acute care facilities as outpatients, and in the hospital with oral and/or parenteral opioids.

OBJECTIVES

The objectives of this study were to determine the effects of hydroxyurea (HU) on length of stay (LOS) in hospital and opioid utilization during hospitalization, outpatient acute care contacts, and at home.

METHODS

Data from patient diaries, follow-up visit forms, and medical contact forms for the 299 patients enrolled in the MSH were analyzed. Types and dosages of at home, acute care, and in-hospital analgesic usage were explored descriptively.

RESULTS

At-home analgesics were used on 40% of diary days and 80% of two-week follow-up periods, with oxycodone and codeine the most frequently used. Responders to HU used analgesics on fewer days. During hospitalization, 96% were treated with parenteral opioids, with meperidine the most frequently used; oxycodone was the most commonly used oral medication. The average LOS for responders to HU was about two days less than for other groups, and their cumulative time hospitalized during the trial was significantly less than for nonresponders or placebo groups (P<0.022). They also had the lowest doses of parenteral opioids during acute care crises (P=0.015).

CONCLUSION

Beneficial effects of HU include shortening the duration of hospitalization because of acute painful episodes and reducing the net amount of opioid utilization.

How I use hydroxyurea to treat young patients with sickle cell anemia

Hydroxyurea has many characteristics of an ideal drug for sickle cell anemia (SCA) and provides therapeutic benefit through multiple mechanisms of action. Over the past 25 years, substantial experience has accumulated regarding its safety and efficacy for patients with SCA. Early proof-of-principle studies were followed by prospective phase 1/2 trials demonstrating efficacy in affected adults, then adolescents and children, and more recently infants and toddlers. The phase 3 National Heart, Lung and Blood Institute-sponsored Multicenter Study of Hydroxyurea trial proved clinical efficacy for preventing acute vaso-occlusive events in severely affected adults. Based on this cumulative experience, hydroxyurea has emerged as an important therapeutic option for children and adolescents with recurrent vaso-occlusive events; recent evidence documents sustained long-term benefits with prevention or reversal of chronic organ damage. Despite abundant evidence for its efficacy, however, hydroxyurea has not yet translated into effective therapy for SCA. Because many healthcare providers have inadequate knowledge about hydroxyurea, patients and families are not offered treatment or decline because of unrealistic fears. Limited support for hydroxyurea by lay organizations and inconsistent medical delivery systems also contribute to underuse. Although questions remain regarding its long-term risks and benefits, current evidence suggests that many young patients with SCA should receive hydroxyurea treatment.

A randomized, controlled clinical trial of ketoprofen for sickle-cell disease vaso-occlusive crises in adults

Vaso-occlusive crisis (VOC) is the primary cause of hospitalization of patients with sickle-cell disease. Treatment mainly consists of intravenous morphine, which has many dose-related side effects. Nonsteroidal antiinflammatory drugs have been proposed to provide pain relief and decrease the need for opioids. Nevertheless, only a few underpowered trials of nonsteroidal antiinflammatory drugs for sickle-cell VOC have been conducted, and conflicting results were reported. We conducted a phase 3, double-blind, randomized, placebo-controlled trial with ketoprofen (300 mg/day for 5 days), a nonselective cyclooxygenase inhibitor, for severe VOC in adults. A total of 66 VOC episodes were included. The primary efficacy outcome was VOC duration. The secondary end points were morphine consumption, pain relief, and treatment failure. Seven VOC episodes in each group were excluded from the analysis because of treatment failures. No significant between-group differences were observed for the primary outcome or the secondary end points. Thus, although ketoprofen was well-tolerated, it had no significant efficacy as treatment of VOC requiring hospitalization. These findings argue against its systematic use in this setting.

Utility of WHOQOL-BREF in measuring quality of life in sickle cell disease

Background

Sickle cell disease is the commonest genetic disorder in Jamaica and most likely exerts numerous effects on quality of life (QOL) of those afflicted with it. The WHOQOL-Bref, which is a commonly utilized generic measure of quality of life, has never previously been utilized in this population. We have sought to study its utility in this disease population.

Methods

491 patients with sickle cell disease were administered the questionnaire including demographics, WHOQOL-Bref, Short Form-36 (SF-36), Flanagan's quality of life scale (QOLS) and measures of disease severity at their routine health maintenance visits to the sickle cell unit. Internal consistency reliabilities, construct validity and "known groups" validity of the WHOQOL-Bref, and its domains, were examined; and then compared to those of the other instruments.

Results

All three instruments had good internal consistency, ranging from 0.70 to 0.93 for the WHOQOL-Bref (except the 'social relationships' domain), 0.86–0.93 for the SF-36 and 0.88 for the QOLS. None of the instruments showed any marked floor or ceiling effects except the SF-36 'physical health' and 'role limitations' domains. The WHOQOL-Bref scale also had moderate concurrent validity and showed strong "known groups" validity.

Conclusion

This study has shown good psychometric properties of the WHOQOL-Bref instrument in determining QOL of those with sickle cell disease. Its utility in this regard is comparable to that of the SF-36 and QOLS.