Arif H. Kamal

How to Interpret and Pursue an Abnormal Prothrombin Time, Activated Partial Thromboplastin Time, and Bleeding Time in Adults

The prothrombin time (PT) and activated partial thromboplastin time (APTT) are among the most commonly ordered coagulation tests. In 2005, more than 140,000 PT and more than 95,000 APTT tests were performed at Mayo Clinic. The most common indications for ordering these tests include anticoagulant monitoring, initial evaluation of hemorrhage, and, although not generally indicated, routine preoperative screening. In addition, the bleeding time (BT) test, which is infrequently performed, is still available in certain institutions. Abnormal results from these tests (prolonged PT, APTT, and BT), especially from tests conducted for initial evaluation of hemorrhage or for preoperative screening, may pose a diagnostic dilemma to the nonhematologist. We review the essential factors affecting test results; provide a practical approach to the evaluation of a prolonged PT, APTT, and BT; and offer suggestions on which reflexive tests are appropriate and when to consider a subspecialty consultation.

Safety and benefit of discontinuing statin therapy in the setting of advanced, life-limiting illness: a randomized clinical trial.

IMPORTANCE For patients with limited prognosis, some medication risks may outweigh the benefits, particularly when benefits take years to accrue; statins are one example. Data are lacking regarding the risks and benefits of discontinuing statin therapy for patients with limited life expectancy. OBJECTIVE To evaluate the safety, clinical, and cost impact of discontinuing statin medications for patients in the palliative care setting. DESIGN, SETTING, AND PARTICIPANTS This was a multicenter, parallel-group, unblinded, pragmatic clinical trial. Eligibility included adults with an estimated life expectancy of between 1 month and 1 year, statin therapy for 3 months or more for primary or secondary prevention of cardiovascular disease, recent deterioration in functional status, and no recent active cardiovascular disease. Participants were randomized to either discontinue or continue statin therapy and were monitored monthly for up to 1 year. The study was conducted from June 3, 2011, to May 2, 2013. All analyses were performed using an intent-to-treat approach. INTERVENTIONS Statin therapy was withdrawn from eligible patients who were randomized to the discontinuation group. Patients in the continuation group continued to receive statins. MAIN OUTCOMES AND MEASURES Outcomes included death within 60 days (primary outcome), survival, cardiovascular events, performance status, quality of life (QOL), symptoms, number of nonstatin medications, and cost savings. RESULTS A total of 381 patients were enrolled; 189 of these were randomized to discontinue statins, and 192 were randomized to continue therapy. Mean (SD) age was 74.1 (11.6) years, 22.0% of the participants were cognitively impaired, and 48.8% had cancer. The proportion of participants in the discontinuation vs continuation groups who died within 60 days was not significantly different (23.8% vs 20.3%; 90% CI, -3.5% to 10.5%; P=.36) and did not meet the noninferiority end point. Total QOL was better for the group discontinuing statin therapy (mean McGill QOL score, 7.11 vs 6.85; P=.04). Few participants experienced cardiovascular events (13 in the discontinuation group vs 11 in the continuation group). Mean cost savings were

Tamoxifen Pharmacogenomics: The Role of CYP2D6 as a Predictor of Drug Response

3.37 per day and

Natural History of Paclitaxel-Associated Acute Pain Syndrome: Prospective Cohort Study NCCTG N08C1

716 per patient. CONCLUSIONS AND RELEVANCE This pragmatic trial suggests that stopping statin medication therapy is safe and may be associated with benefits including improved QOL, use of fewer nonstatin medications, and a corresponding reduction in medication costs. Thoughtful patient-provider discussions regarding the uncertain benefit and potential decrement in QOL associated with statin continuation in this setting are warranted. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT01415934.

Idiopathic Systemic Capillary Leak Syndrome (Clarkson's Disease): The Mayo Clinic Experience

Tamoxifen continues to be a standard endocrine therapy for the prevention and treatment of estrogen receptor (ER)‐positive breast cancer. Tamoxifen can be considered a classic “pro‐drug,” requiring metabolic activation to elicit pharmacological activity. CYP2D6 is the rate‐limiting enzyme catalyzing the conversion of tamoxifen into metabolites with significantly greater affinity for the ER and greater ability to inhibit cell proliferation. Both genetic and environmental (drug‐induced) factors that alter CYP2D6 enzyme activity directly affect the concentrations of the active tamoxifen metabolites and the outcomes of patients receiving adjuvant tamoxifen. The a priori knowledge of the pharmacogenetic variation known to abrogate CYP2D6 enzyme activity may provide a means by which the hormonal therapy of breast cancer can be individualized.

Community-based palliative care: the natural evolution for palliative care delivery in the U.S.

PURPOSE The characteristics and natural history of the paclitaxel-acute pain syndrome (P-APS) and paclitaxels more chronic neuropathy have not been well delineated. METHODS Patients receiving weekly paclitaxel (70 to 90 mg/m(2)) completed daily questionnaires and weekly European Organisation for Research and Treatment of Cancer (EORTC) Chemotherapy-Induced Peripheral Neuropathy (CIPN) -20 instruments during the entire course of therapy. RESULTS P-APS symptoms peaked 3 days after chemotherapy. Twenty percent of patients had pain scores of 5 to 10 of 10 with the first dose of paclitaxel. Sensory neuropathy symptoms were more prominent than were motor or autonomic neuropathy symptoms. Of the sensory neuropathy symptoms, numbness and tingling were more prominent than was shooting or burning pain. Patients with higher P-APS pain scores with the first dose of paclitaxel appeared to have more chronic neuropathy. CONCLUSION These data support that the P-APS is related to nerve pathology as opposed to being arthralgias and/or myalgias. Numbness and tingling are more prominent chronic neuropathic symptoms than is shooting or burning pain.

Further data supporting that paclitaxel-associated acute pain syndrome is associated with development of peripheral neuropathy†

OBJECTIVE To determine clinical features, natural history, and outcome of a well-defined cohort of 25 consecutive patients with idiopathic systemic capillary leak syndrome (SCLS) evaluated at a tertiary care center. PATIENTS AND METHODS Records of patients diagnosed as having SCLS from November 1, 1981, through April 30, 2008, were reviewed. Descriptive statistics were used to analyze patient demographics, clinical features, complications, and therapeutic interventions. RESULTS Of the 34 patients whose records were reviewed, 25 fulfilled all diagnostic criteria for SCLS. The median age at diagnosis of SCLS was 44 years. Median follow-up of surviving patients was 4.9 years, and median time to diagnosis from symptom onset was 1.1 years (interquartile range, 0.5-4.1 years). Flulike illness or myalgia was reported by 14 patients (56%) at onset of an acute attack of SCLS, and rhabdomyolysis developed in 9 patients (36%). Patients with a greater decrease in albumin level had a higher likelihood of developing rhabdomyolysis (p=.03). Monoclonal gammopathy, predominantly of the IgG-κ type, was found in 19 patients (76%). The progression rate to multiple myeloma was 0.7% per person-year of follow-up. The overall response rate to the different therapies was 76%, and 24% of patients sustained durable (>2 years) complete remission. The estimated 5-year overall survival rate was 76% (95% confidence interval, 59%-97%). CONCLUSION Systemic capillary leak syndrome, a rare disease that occurs in those of middle age, is usually diagnosed after a considerable delay from onset of symptoms. The degree of albumin decrement during an attack correlates with development of rhabdomyolysis. A reduction in the frequency and/or the severity of attacks was seen in nearly three-fourths of patients who were offered empirical therapies. The rate of progression to multiple myeloma appears to be comparable to that of monoclonal gammopathy of undetermined significance.

Further Data Supporting That Paclitaxel-Associated Acute Pain Syndrome Is Associated With Development of Peripheral Neuropathy North Central Cancer Treatment Group Trial N08C1

Palliative care in the U.S. has evolved from a system primarily reliant on community-based hospices to a combined model that includes inpatient services at most large hospitals. However, these two dominant approaches leave most patients needing palliative care-those at home (including nursing homes) but not yet ready for hospice-unable to access the positive impacts of the palliative care approach. We propose a community-based palliative care (CPC) model that spans the array of inpatient and outpatient settings in which palliative care is provided and links seamlessly to inpatient care; likewise, it would span the full trajectory of advanced illness rather than focusing on the period just before death. Examples of CPC programs are developing organically across the U.S. As our understanding of CPC expands, standardization is needed to ensure replicability, consistency, and the ability to relate intervention models to outcomes. A growing body of literature examining outpatient palliative care supports the role of CPC in improving outcomes, including reduction in symptom burden, improved quality of life, increased survival, better satisfaction with care, and reduced health care resource utilization. Furthermore the examination of how to operationalize CPC is needed before widespread implementation can be realized. This article describes the key characteristics of CPC, highlighting its role in longitudinal care across patient transitions. Distinguishing features include consistent care across the disease trajectory independent of diagnosis and prognosis; inclusion of inpatient, outpatient, long-term care, and at-home care delivery; collaboration with other medical disciplines, nursing, and allied health; and full integration into the health care system (rather than parallel delivery).

Dyspnea Review for the Palliative Care Professional: Treatment Goals and Therapeutic Options

Paclitaxel causes an acute pain syndrome (P‐APS), occurring within days after each dose and usually abating within days. Paclitaxel also causes a more classic peripheral neuropathy, which steadily increases in severity with increasing paclitaxel total doses. Little detail is available regarding the natural history of these 2 syndromes, or any relationship between them, although a recent publication does provide natural history data about weekly paclitaxel, supporting an association between the severity of P‐APS and eventual peripheral neuropathy symptoms.

Prevalence and Predictors of Burnout Among Hospice and Palliative Care Clinicians in the U.S.

Paclitaxel causes an acute pain syndrome (P‐APS), occurring within days after each dose and usually abating within days. Paclitaxel also causes a more classic peripheral neuropathy, which steadily increases in severity with increasing paclitaxel total doses. Little detail is available regarding the natural history of these 2 syndromes, or any relationship between them, although a recent publication does provide natural history data about weekly paclitaxel, supporting an association between the severity of P‐APS and eventual peripheral neuropathy symptoms.