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Biomedical subjects

Michael H Allen

Publications and source records attributed to Michael H Allen.

33 records · Page 2Linked to original sources
PubMed2004

Phenomenology of rapid-cycling bipolar disorder: data from the first 500 participants in the Systematic Treatment Enhancement Program.

OBJECTIVE: This study compared demographic and phenomenological variables between bipolar patients with and without rapid cycling as a function of bipolar I versus bipolar II status. METHOD: The authors examined demographic, historical, and symptomatic features of patients with and without rapid cycling in a cross-sectional study of the first 500 patients with bipolar I or bipolar II disorder enrolled in the Systematic Treatment Enhancement Program for Bipolar Disorder, a multicenter project funded by the National Institute of Mental Health designed to evaluate the longitudinal outcome of patients with bipolar disorder. RESULTS: Rapid-cycling bipolar disorder occurred in 20% of the study group. Rapid-cycling patients were more likely to be women, although the effect was somewhat more pronounced among bipolar I patients than bipolar II patients. In addition, rapid-cycling bipolar patients experienced onset of their illness at a younger age, were more often depressed at study entry, and had poorer global functioning in the year before study entry than nonrapid-cycling patients. Rapid-cycling patients also experienced a significantly greater number of depressive and hypomanic/manic episodes in the prior year. A lifetime history of psychosis did not distinguish between rapid and nonrapid-cycling patients, although bipolar I patients were more likely to have experienced psychosis than bipolar II patients. CONCLUSIONS: Patients with rapid-cycling bipolar disorder demonstrate a greater severity of illness than nonrapid-cycling patients on a number of clinical measures. This study highlights the need to refine treatments for rapid cycling to reduce the overall morbidity and mortality of patients with this illness course modifier.

Adult↗
PubMed2003

Treatment of behavioral emergencies: a summary of the expert consensus guidelines.

OBJECTIVES: Behavioral emergencies are a common and serious problem for consumers, their communities, and the healthcare settings on which they rely, but there is little research to guide provider responses to this challenge. Key constructs such as agitation have not been adequately operationalized so that the criteria defining a behavioral emergency are vague. A significant number of deaths of patients in restraint has focused government and regulators on these issues, but a consensus about key elements in the management of behavioral emergencies has not yet been articulated by the provider community. The authors assembled a panel of 50 experts to define the following elements: the threshold for emergency interventions, the scope of assessment for varying levels of urgency and cooperation, guiding principles in selecting interventions, and appropriate physical and medication strategies at different levels of diagnostic confidence and for a variety of etiologies and complicating conditions. METHOD: A written survey with 808 decision points was completed by 50 experts. A modified version of the RAND Corporation 9-point scale for rating appropriateness of medical decisions was used to score options. Consensus on each option was defined as a non-random distribution of scores by chi-square "goodness-of-fit" test. We assigned a categorical rank (first line/preferred choice, second line/ alternate choice, third line/usually inappropriate) to each option based on the 95% confidence interval around the mean rating. Guideline tables were constructed describing the preferred strategies in key clinical situations. RESULTS: The expert panel reached consensus on 83% of the options. The relative appropriateness of emergency interventions was ascertained for a continuum of behaviors. When asked about the frequency with which emergency interventions (parenteral medication, restraint, seclusion) were required in their services, 47% of the experts reported that such interventions were necessary for 1%-5% of patients seen in their services and 32% for 6%-20%. In general, the consensus of this panel lends support to many elements of recent regulations from the Health Care Financing Administration (now the Centers for Medicare and Medicaid Services), including the timing of clinician assessment and reassessment and the intensity of nursing care. However, the panel did not endorse the concept of "chemical restraint," instead favoring the idea that medications are treatments for target behaviors in behavioral emergencies even when the causes of these behaviors are not well understood. Control of aggressive behavior emerged as the highest priority during the emergency; however, preserving the physician-patient relationship was rated a close second and became the top priority in the long term. Oral medications, particularly concentrates, were clearly preferred if it is possible to use them. Benzodiazepines alone were top rated in 6 of 12 situations. High-potency conventional antipsychotics used alone never received higher ratings than benzodiazepines used alone. A combination of a benzodiazepine and an antipsychotic was preferred for patients with suspected schizophrenia, mania, or psychotic depression. There was equal support for high-potency conventional or atypical antipsychotics (particularly liquids) in oral combinations with benzodiazepines. Droperidol emerged in fourth place in some situations requiring an injection. CONCLUSIONS: To evaluate many of the treatment options in this survey, the experts had to extrapolate beyond controlled data. Within the limits of expert opinion and with the expectation that future research data will take precedence, these guidelines provide some direction for addressing common clinical dilemmas in the management of psychiatric emergencies and can be used to inform clinicians in acute care settings regarding the relative merits of various strategies.

Journal Article↗
PubMed2003

What do consumers say they want and need during a psychiatric emergency?

Behavioral emergencies are a common and serious problem for consumers, their families and communities, and the healthcare providers on whom they rely for help. In recent years, serious concerns about the management of behavioral and psychiatric emergencies-in particular, the misapplication and overuse of physical and chemical restraints and seclusion-have become a focus of attention for mental health professionals and policy makers as well as for the lay public, the media, and patient advocacy organizations. Policy leaders and clinicians are searching for ways to balance the rights of consumers with considerations of safety and good care in an area in which it is difficult to conduct research. A survey of mental health professionals who are experts on the treatment of psychiatric and behavioral emergencies identified consumer input and collaboration between patient and clinician whenever possible as being extremely important in achieving the best short-term and particularly the best long-term outcomes for patients. The survey of consumer perspectives described in this article was undertaken in response to the need to better understand consumer experiences and preferences. The authors describe four emergency services forums conducted in 2002, which involved a total of 59 consumers. Each forum involved a written consumer survey as well as a workshop to develop and prioritize recommendations for improving psychiatric emergency care. The authors present the results of the consumer survey and summarize the top recommendations from the workshops. In both the survey and the workshops, the consumers repeatedly stressed the importance of having staff treat them with respect, talk to them, listen to them, and involve them in treatment decisions. There were a number of important areas of agreement between the recommendations of the consumer panel and those of the experts in emergency psychiatry surveyed for the Expert Consensus Guidelines on the Treatment of Behavioral Emergencies. These include the desirability of verbal interventions, the use of a collaborative approach, and the use of oral medications guided by the individual consumer's problems, medication experiences, and preferences. The majority of the consumer panel reported adverse experiences with general hospital emergency rooms and, in fact, called for the development of specialized psychiatric emergency services such as those recommended in the Expert Consensus Guidelines. One-fifth of the consumer panel attributed their emergency contact to lack of access to more routine mental health care. The consumers clearly do not reject medications categorically. Almost half indicated that they wanted medications and a similar number indicated benefit from medications, although many complained of forced administration and unwanted side effects. The consumer panel preferred benzodiazepines and ranked haloperidol as a least preferred option. Among their key recommendations for improving psychiatric emergency care, the consumer panel stressed the development of alternatives to traditional emergency room services, the increased use of advance directives, more comfortable physical environments for waiting and treatment, increased use of peer support services, improved training of emergency staff to foster a more humanistic and person-centered approach, increased collaboration between practitioners and patients, and improved discharge planning and post-discharge follow-up. The implications of these findings for improving psychiatric emergency care are considered.

Journal Article↗
PubMed2003

Basal cell carcinoma is associated with high TNF-alpha release but nor with TNF-alpha polymorphism at position--308.

The mechanisms underlying induction of UVB-induced immunosuppression are not fully understood, but tumor necrosis factor alpha (TNF-alpha) is suggested to play a central role. A single base pair polymorphism at position --308 in the promoter region of the TNF-alpha gene associated with an enhanced secretion of TNF-alpha has been identified in humans. We have therefore investigated the association of the --308 polymorphism with the risk of basal cell carcinoma (BCC) in humans. The frequency of TNF G and TNF A alleles among Caucasian patients with a previous BCC (n=191) and health adults (n-107) were compared. For the TNF--308 polymorphism there was significant association between the genotype or allele frequencies and having BCC. To determine whether patients with a previous BCC had an increased capacity to secrete TNF-alpha, mononuclear cells were stimulated with lipopolysaccharide. Mononuclear cells from patients with a previous BCC (n=15) demonstrated a significantly increased release of TNF-alpha upon stimulation with lipopolysaccharide (P<0.03) compared with mononuclear cells age-matched control subjects (n=16). Further studies of other polymorphisms of the TNF-alpha gene associated with increased TNF-alpha production and BCC and necessary.

Adult↗
PubMed2003

Treatment of agitation in bipolar disorder across the life cycle.

Agitation is a common and difficult problem in psychiatric patients; patients with bipolar disorder constitute a substantial proportion of the agitated psychiatric population. Agitation is often seen in bipolar patients during acute manic states, when increased energy levels and reduced need for sleep lead patients to collide with the limits of others. Agitation also occurs during mixed and depressive states, which are characterized by fluctuating energy levels and periods of irritability. Although the prevalence of agitation is similar in men and women, its presentation often differs between the sexes. In addition, the presentations of bipolar disorder in children and in geriatric patients, and thus the manifestations of illness-related agitation, differ both from each other and from that of younger adults. Intensive treatment is required to manage agitated bipolar patients in a manner that rapidly decreases their suffering and maintains their safety and the safety of those around them. Considerations of speed and predictability tend to drive decisions in this setting more than concerns about tolerability. Oral or parenteral benzodiazepines, alone or in combination with an antipsychotic, are recommended as first-line treatment for the termination of behavioral emergencies in mania. Once behavioral control is restored, evidence suggests the combination of orally loaded divalproex sodium with an atypical antipsychotic is associated with more rapid improvement. Medication treatment of children and of geriatric patients must take into account developmental influences on the presentation of bipolar disorder in these different patient groups.

Acute Disease↗
PubMed2002

Family-based analysis using a dense single-nucleotide polymorphism-based map defines genetic variation at PSORS1, the major psoriasis-susceptibility locus.

Psoriasis is a common skin disorder of multifactorial origin. Genomewide scans for disease susceptibility have repeatedly demonstrated the existence of a major locus, PSORS1 (psoriasis susceptibility 1), contained within the major histocompatibility complex (MHC), on chromosome 6p21. Subsequent refinement studies have highlighted linkage disequilibrium (LD) with psoriasis, along a 150-kb segment that includes at least three candidate genes (encoding human leukocyte antigen-C [HLA-C], alpha-helix-coiled-coil-rod homologue, and corneodesmosin), each of which has been shown to harbor disease-associated alleles. However, the boundaries of the minimal PSORS1 region remain poorly defined. Moreover, interpretations of allelic association with psoriasis are compounded by limited insight of LD conservation within MHC class I interval. To address these issues, we have pursued a high-resolution genetic characterization of the PSORS1 locus. We resequenced genomic segments along a 220-kb region at chromosome 6p21 and identified a total of 119 high-frequency SNPs. Using 59 SNPs (18 coding and 41 noncoding SNPs) whose position was representative of the overall marker distribution, we genotyped a data set of 171 independently ascertained parent-affected offspring trios. Family-based association analysis of this cohort highlighted two SNPs (n.7 and n.9) respectively lying 7 and 4 kb proximal to HLA-C. These markers generated highly significant evidence of disease association (P<10-9), several orders of magnitude greater than the observed significance displayed by any other SNP that has previously been associated with disease susceptibility. This observation was replicated in a Gujarati Indian case/control data set. Haplotype-based analysis detected overtransmission of a cluster of chromosomes, which probably originated by ancestral mutation of a common disease-bearing haplotype. The only markers exclusive to the overtransmitted chromosomes are SNPs n.7 and n.9, which define a 10-kb PSORS1 core risk haplotype. These data demonstrate the power of SNP haplotype-based association analyses and provide high-resolution dissection of genetic variation across the PSORS1 interval, the major susceptibility locus for psoriasis.

Case-Control Studies↗
PubMedDate not supplied

Care satisfaction, hope, and life functioning among adults with bipolar disorder: data from the first 1000 participants in the Systematic Treatment Enhancement Program.

OBJECTIVE: The Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD) is designed to evaluate the longitudinal outcome of patients with bipolar disorder. The STEP-BD disease-management model is built on evidence-based practices and a collaborative care approach designed to maximize specific and nonspecific treatment mechanisms. This prospective study examined the longitudinal relationships between patients' satisfaction with care, levels of hope, and life functioning in the first 1000 patients to enter STEP-BD. METHODS: The study used scores from the Care Satisfaction Questionnaire, Beck Hopelessness Scale, Range of Impaired Functioning Tool, Young Mania Rating Scale, and Montgomery-Asberg Depression Rating Scale at 5 time points during a 1-year interval. Analyses tested mediational pathways between care satisfaction, hope, and life functioning, depression, and mania using mixed-effects (random and fixed) regression models. RESULTS: Increases in care satisfaction were associated with decreased hopelessness (P < .01) but not related to symptoms of depression or mania. Similarly, decreased hopelessness was associated with better life functioning (P < .01) but not related to symptoms of depression or mania. Depression was independently associated with poorer life functioning (P < .0001). CONCLUSIONS: This study provided support for the hypothesized mediational pathway between care satisfaction, hopelessness, and life functioning. Findings suggest that providing care that maximizes patient hope may be important. By so doing, patients might overcome the learned helplessness/hopelessness that often accompanies a cyclical illness and build a realistic illness-management strategy.

Activities of Daily Living↗
PubMedDate not supplied

Use of restraints and pharmacotherapy in academic psychiatric emergency services.

Psychiatric emergency services (PES) are an increasingly important component of mental health services. To assess the type and scope of services delivered in the PES setting, the American Association for Emergency Psychiatry sponsored an Expert Consensus Panel Survey of these services in 1999. The questionnaire was mailed to medical directors of PES facilities with 91% (n = 51) responding. More than 90% of the respondents were teaching sites. Restraints were reportedly used in a mean of 8.5% of presentations for a mean of 3.3 h per episode. Restraint utilization correlated with the percentage of psychotic patients treated, but not with a wide variety of other patient and service variables. Involuntary medications were used in 16% of cases, though in oral form in 29% of those cases. A large majority (94%) endorsed mild sedation permitting further assessment as the appropriate endpoint and rejected sleep or heavy sedation as an endpoint (82%). Benzodiazepines received the strongest endorsements and 82% indicated it would be appropriate to administer a benzodiazepine alone for agitation first and initiate antipsychotic treatment subsequently if appropriate. When there is no history of prior antipsychotic exposure, 60% favored a benzodiazepine alone. However, given a history of previous antipsychotic treatment, only 8% endorsed this strategy. Most respondents (78%) preferred to use oral medication for treating behavioral emergencies, whenever possible but 70.3% reported regular use of an IM combination of a benzodiazepine and high-potency typical neuroleptic when necessary. In addition to managing emergencies, 82% of services initiated standing medications for patients being admitted to hospital settings and 70% initiated regular medication treatments for patients being released to the community. Of patients started on oral antipsychotics, 42% received an atypical antipsychotic. Reflecting medication characteristics of particular importance in emergency settings, most respondents (92%) cited selective serotonin reuptake inhibitors as the preferred type of antidepressant, and divalproex or related compounds (90%) for treatment of bipolar disorder in the PES.

Academic Medical Centers↗
PubMedDate not supplied

Prevalence and correlates of tobacco use in bipolar disorder: data from the first 2000 participants in the Systematic Treatment Enhancement Program.

OBJECTIVE: Only a few small descriptive studies have examined the prevalence and correlates of tobacco use among bipolar patients. We predicted that poorly controlled manic, depressed and mixed states, and the presence of psychotic symptoms, would be associated with a greater prevalence of smoking among patients with bipolar disorder. METHOD: We examined the prevalence of smoking in a cross-sectional sample of 1904 patients with bipolar disorder enrolled in the National Institute of Mental Health's Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD) database. We also examined the relationship between smoking and other factors including: bipolar subtype, current clinical status, illness severity (e.g., number of prior mood episodes), age of bipolar onset, gender, education, socioeconomic status, and concurrent substance use. RESULTS: At STEP-BD program entry, 31.2% of patients reported that they were smokers. Patients who were male, less educated, and/or had lower income were more likely to be smokers (P<.01). Additionally, patients with rapid cycling, comorbid psychiatric disorders, and/or substance abuse, and those experiencing a current episode of illness were more likely to be smokers (P<.0001). More lifetime depressive and manic episodes as well as greater severity of depressive and manic symptoms were associated with smoking (P<.001). Use of atypical antipsychotic medications was more prevalent among smokers (P=.04). CONCLUSIONS: Clinical and demographic variables are associated with smoking in this sample of bipolar patients. Longitudinal analyses are needed to determine how mood and bipolar symptoms interact with smoking over the episodic course of bipolar disorder. Additional studies should focus on whether controlling bipolar symptoms is associated with cessation of smoking.

Adult↗
PubMedDate not supplied

Heisenberg in the ER: observation appears to reduce involuntary intramuscular injections in a psychiatric emergency service.

INTRODUCTION: Chemical restraint is controversial. Appropriate use is ill-defined and chemical restraint may be overutilized. During the period of an unrelated observational study for patients with acute psychomotor agitation in a psychiatric emergency service, we noticed a significant reduction in the number of involuntary intramuscular injections administered. RESULTS: We observed a 27% decrease (P=.015) in the number of involuntary intramuscular injections in the 3-month observational study period, compared to 3-month periods before and after the study. CONCLUSION: We suggest that the observation process itself may have been beneficial and may have reduced the incidence of unnecessary intramuscular injections.

Acute Disease↗
PubMedDate not supplied

Intramuscular olanzapine in patients with borderline personality disorder: an observational study in an emergency room.

OBJECTIVE: Despite the frequency of borderline personality disorder (BPD) in patients with acute agitation in emergency departments (EDs), there are few data about the use of intramuscular (IM) psychotropics in those patients. This is the first open-label study with olanzapine in this setting. METHOD: Measures were collected prospectively for patients with acute agitation in ED. Consent was obtained subsequently and diagnosis ascertained using the Structured Clinical Interview for DSM-IV. A group of 25 patients with severe agitation and BPD received olanzapine 10 mg IM. Efficacy and safety data are available at baseline, 2 h postinjection and at discharge. RESULTS: Significant reductions of agitation associated with good tolerance were observed 2 h after the first IM olanzapine. Sixteen percent of patients required a second IM olanzapine. CONCLUSIONS: Randomized, placebo-controlled studies are needed to confirm the efficacy of IM olanzapine in patients with acute agitation and BPD.

Adult↗
PubMedDate not supplied

Validity of the distinction between primary and secondary substance use disorder in patients with bipolar disorder: data from the first 1000 STEP-BD participants.

The validity of a primary/secondary substance use disorder (SUD) distinction was evaluated in the first 1000 patients enrolled in the Systematic Treatment Enhancement Program for Bipolar Disorder. Patients with primary SUD (n = 116) were compared with those with secondary SUD (n = 275) on clinical course variables. Patients with secondary SUD had fewer days of euthymia, more episodes of mania and depression, and a greater history of suicide attempts. These findings were fully explained by variations in age of onset of bipolar disorder. The order of onset of SUDs was not linked to bipolar outcomes when age of onset of bipolar disorder was statistically controlled. The primary/secondary distinction for SUD is not valid when variations in the age of onset of the non-SUD are linked to course characteristics.

Adult↗
PubMedDate not supplied

Differing effects of antipsychotic medications on substance abuse treatment patients with co-occurring psychotic and substance abuse disorders.

This retrospective study of patients treated in a ninety-day, inpatient, dual-diagnosis treatment program examined antipsychotic effectiveness in this population using length of stay in treatment and successful program completion as outcome measures. All patients with co-occurring substance dependence and schizophrenia or schizoaffective disorder treated with olanzapine, risperidone, ziprasidone, and typical depot neuroleptics from January 2001 to December 2003 (N = 55) are the subjects of this study. Patients stayed longer in treatment when taking risperidone (82 +/- 19 days) or ziprasidone (74 +/- 21 days) compared with olanzapine (44 +/- 30 days) or typicals (47 +/- 36 days). Eighty-eight percent of risperidone patients and 64% of ziprasidone patients successfully completed the program, while only 33% of olanzapine patients and 40% of patients on typicals successfully completed the program. Risperidone and ziprasidone were associated with significantly better program performance than olanzapine or depot typicals in this population. Possible reasons for this difference are discussed.

Adult↗