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Kaplan J, Rado J, Laiteerapong N. Mandatory Documented Consent and Cost-Sharing Impede Access to Collaborative Care Psychiatry. J Gen Intern Med 2024; 39:500. [PMID: 38087180 PMCID: PMC10897096 DOI: 10.1007/s11606-023-08556-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 12/01/2023] [Indexed: 02/28/2024]
Affiliation(s)
- Jonathan Kaplan
- Department of Internal Medicine, Rush University, Chicago, IL, USA.
- Department of Psychiatry and Behavioral Sciences, Rush University, Chicago, IL, USA.
| | | | - Neda Laiteerapong
- Department of Medicine, University of Chicago, Chicago, IL, USA
- Department of Psychiatry & Behavioral Neuroscience, University of Chicago, Chicago, IL, USA
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Kaplan J, Rado J, Laiteerapong N. Mandatory Documented Consent and Cost-Sharing Impede Access to Collaborative Care Psychiatry. J Gen Intern Med 2023; 38:3616-3617. [PMID: 37698723 PMCID: PMC10713939 DOI: 10.1007/s11606-023-08394-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 08/24/2023] [Indexed: 09/13/2023]
Affiliation(s)
- Jonathan Kaplan
- Department of Internal Medicine, Rush University, Chicago, IL, USA.
- Department of Psychiatry and Behavioral Sciences, Rush University, Chicago, IL, USA.
| | | | - Neda Laiteerapong
- Department of Medicine, University of Chicago, Chicago, IL, USA
- Department of Psychiatry & Behavioral Neuroscience, University of Chicago, Chicago, IL, USA
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3
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Fu E, Carroll AJ, Rosenthal LJ, Rado J, Burnett-Zeigler I, Jordan N, Carlo AD, Ekwonu A, Kust A, Brown CH, Csernansky JG, Smith JD. Implementation Barriers and Experiences of Eligible Patients Who Failed to Enroll in Collaborative Care for Depression and Anxiety. J Gen Intern Med 2023; 38:366-374. [PMID: 35931910 PMCID: PMC9362538 DOI: 10.1007/s11606-022-07750-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 07/20/2022] [Indexed: 10/31/2022]
Abstract
BACKGROUND Effective and efficient implementation of the Collaborative Care Model (CoCM) for depression and anxiety is imperative for program success. Studies examining barriers to implementation often omit patient perspectives. OBJECTIVES To explore experiences and attitudes of eligible patients referred to CoCM who declined participation or were unable to be reached, and identify implementation barriers to inform strategies. DESIGN Convergent mixed-methods study with a survey and interview. PARTICIPANTS Primary care patients at an academic medical center who were referred to a CoCM program for anxiety and depression by their primary care clinician (PCC) but declined participation or were unable to be reached by the behavioral health care manager to initiate care (n = 80). Interviews were conducted with 45 survey respondents. MAIN MEASURES Survey of patients' referral experiences and behavioral health preferences as they related to failing to enroll in the program. Interview questions were developed using the Consolidated Framework for Implementation Research version 2.0 (CFIR 2.0) to identify implementation barriers to enrollment. KEY RESULTS Survey results found that patients were uncertain about insurance coverage, did not understand the program, and felt services were not necessary. Referred patients who declined participation were concerned about how their mental health information would be used and preferred treatment without medication. Men agreed more that they did not need services. Qualitative results exhibited a variety of implementation determinants (n = 23) across the five CFIR 2.0 domains. Barriers included mental health stigma, perceiving behavioral health as outside of primary care practice guidelines, short or infrequent primary care appointments, prioritizing physical health over mental health, receiving inaccurate program information, low motivation to engage, and a less established relationship with their PCC. CONCLUSIONS Multiple barriers to enrollment led to failing to link patients to care, which can inform implementation strategies to address the patient-reported experiences and concerns.
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Affiliation(s)
- Emily Fu
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Allison J Carroll
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Lisa J Rosenthal
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Northwestern Medicine, Chicago, IL, USA
| | - Jeffrey Rado
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Northwestern Medicine, Chicago, IL, USA
| | - Inger Burnett-Zeigler
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Neil Jordan
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center of Innovation for Complex Chronic Healthcare, Hines VA Hospital, Hines, IL, USA
| | - Andrew D Carlo
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Adaora Ekwonu
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- University of Chicago Pritzker School of Medicine, Chicago, IL, USA
| | - Ariella Kust
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - C Hendricks Brown
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - John G Csernansky
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Justin D Smith
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
- Department of Population Health Sciences, Spencer Fox Eccles School of Medicine at the University of Utah, Salt Lake City, UT, USA.
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4
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Pinkhasov A, Xiong G, Bourgeois JA, Heinrich TW, Huang H, Coriolan S, Annamalai A, Mangal JP, Frankel S, Lang M, Raj YP, Dandois M, Barth K, Stewart AL, Rado J, Pesek J, Sanders A, Spearman-McCarthy EV, Gagliardi J, Fiedorowicz JG. Management of SIADH-related hyponatremia due to psychotropic medications - An expert consensus from the Association of Medicine and Psychiatry. J Psychosom Res 2021; 151:110654. [PMID: 34739943 PMCID: PMC10911096 DOI: 10.1016/j.jpsychores.2021.110654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 10/03/2021] [Accepted: 10/22/2021] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Hyponatremia is the most common electrolyte imbalance encountered in clinical practice and is associated with negative healthcare outcomes and cost. SIADH is thought to account for one third of all hyponatremia cases and is typically an insidious process. Psychotropic medications are commonly implicated in the etiology of drug induced SIADH. There is limited guidance for clinicians on management of psychotropic-induced SIADH. METHODS After an extensive review of the existing literature, clinical-educators from the Association of Medicine and Psychiatry developed expert consensus recommendations for management of psychotropic-induced SIADH. A risk score was proposed based on risk factors for SIADH to guide clinical decision-making. RESULTS SSRIs, SNRIs, antipsychotics, carbamazepine, and oxcarbazepine have moderate to high level of evidence demonstrating their association with SIADH. Evaluation for an avoidance of medications that cause hyponatremia is particularly important. Substitution with medication that is less likely to cause SIADH should be considered when appropriate. We propose an algorithmic approach to monitoring hyponatremia with SIADH and corresponding treatment depending on symptom severity. CONCLUSIONS The proposed algorithm can help clinicians in determining whether psychotropic medication should be stopped, reduced or substituted where SIADH is suspected with recommendations for sodium (Na+) monitoring. These recommendations preserve a role for clinical judgment in the management of hyponatremia with consideration of the risks and benefits, which may be particularly relevant for complex patients that present with medical and psychiatric comorbidities. Further studies are needed to determine whether baseline and serial Na+ monitoring reduces morbidity and mortality.
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Affiliation(s)
- Aaron Pinkhasov
- Department of Psychiatry, NYU Langone Hospital-Long Island, NY, United States of America; Psychiatry and Medicine, NYULI - SOM, NY, United States of America.
| | - Glen Xiong
- University of California at Davis, CA, United States of America
| | - James A Bourgeois
- Psychiatry, Baylor Scott & White Health, TX, United States of America
| | - Thomas W Heinrich
- Psychiatry and Behavioral Medicine and Family and Community Medicine, Medical College of Wisconsin, WI, United States of America
| | - Heather Huang
- Psychiatry and Internal Medicine, University of WI, WI, United States of America
| | - Shanice Coriolan
- NYU Langone Hospital - Long Island, NY, United States of America
| | - Aniyizhai Annamalai
- Psychiatry and Internal Medicine, Yale School of Medicine, CT, United States of America
| | - Jed P Mangal
- Psychiatry, Uniformed Services University of the Health Sciences, MD, United States of America
| | - Steven Frankel
- Psychiatry, University of Minnesota Medical School, MN, United States of America; Psychiatry, UCSF, Medical School, University of Minnesota, MN, United States of America
| | - Michael Lang
- Internal Medicine and Psychiatry, Brody School of Medicine at East Carolina University, NC, United States of America
| | - Y Pritham Raj
- Depts of Internal Medicine & Psychiatry, Oregon Health & Science University, United States of America
| | | | - Kelly Barth
- Psychiatry and Internal Medicine, Medical University of South Carolina, SC, United States of America
| | - Anne Louise Stewart
- Consultation-Liaison Psychiatry, University of Texas Southwestern, TX, United States of America
| | - Jeffrey Rado
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, IL, United States of America
| | - Justin Pesek
- Baylor Scott & White Health, TX, United States of America
| | - Aaron Sanders
- Baylor Scott & White Health, TX, United States of America
| | - E Vanessa Spearman-McCarthy
- Internal Medicine and Psychiatry, Medical College of Georgia, Augusta University, GA, United States of America
| | - Jane Gagliardi
- Psychiatry and Behavioral Sciences, Duke University School of Medicine, NC, United States of America
| | - Jess G Fiedorowicz
- Mental Health, The Ottawa Hospital, ON, Canada; Ottawa Hospital Research Institute, Department of Psychiatry, School of Epidemiology and Public Health, ON, Canada; University of Ottawa, and uOttawa Brain and Mind Research Institute, ON, Canada
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Wolk CB, Alter CL, Kishton R, Rado J, Atlas JA, Press MJ, Jordan N, Grant M, Livesey C, Rosenthal LJ, Smith JD. Improving Payment for Collaborative Mental Health Care in Primary Care. Med Care 2021; 59:324-326. [PMID: 33427798 DOI: 10.1097/mlr.0000000000001485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND There is strong evidence supporting implementation of the Collaborative Care Model within primary care. Fee-for-service payment codes, published by Current Procedural Terminology in 2018, have made collaborative care separately reimbursable for the first time. These codes (ie, 99492-99494) reimburse for time spent per month by any member of the care team engaged in Collaborative Care, including behavioral care managers, primary care providers, and consulting psychiatrists. Time-based billing for these codes presents challenges for providers delivering Collaborative Care services. OBJECTIVES Based on experience from multiple health care organizations, we reflect on these challenges and provide suggestions for implementation and future refinement of the codes. CONCLUSIONS Further refinements to the codes are encouraged, including moving from a calendar month to a 30-day reimbursement cycle. In addition, we recommend payers adopt the new code proposed by the Centers for Medicare and Medicaid Services to account for smaller increments of time.
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Affiliation(s)
- Courtney Benjamin Wolk
- Department of Psychiatry, Perelman School of Medicine
- Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA
| | - Carol L Alter
- Department of Psychiatry, Baylor Scott & White, Temple, TX
| | - Rachel Kishton
- National Clinician Scholars Program, University of Pennsylvania, Philadelphia, PA
| | - Jeffrey Rado
- Northwestern Medicine
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | - Matthew J Press
- Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA
- Primary Care Service Line, University of Pennsylvania Health System, Philadelphia, PA
| | - Neil Jordan
- Departments of Psychiatry and Behavioral Sciences
- Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago
- Center of Innovation for Complex Chronic Healthcare, Hines, IL
| | - Michael Grant
- Department of Information Sciences (Population Health), Northwestern Medicine
| | | | - Lisa J Rosenthal
- Northwestern Medicine
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Justin D Smith
- Departments of Psychiatry and Behavioral Sciences
- Preventive Medicine
- Medical Social Sciences
- Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL
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Xiong GL, Pinkhasov A, Mangal JP, Huang H, Rado J, Gagliardi J, Demoss D, Karol D, Suo S, Lang M, Stern M, Spearman EV, Onate J, Annamalai A, Saliba Z, Heinrich T, Fiedorowicz JG. QTc monitoring in adults with medical and psychiatric comorbidities: Expert consensus from the Association of Medicine and Psychiatry. J Psychosom Res 2020; 135:110138. [PMID: 32442893 DOI: 10.1016/j.jpsychores.2020.110138] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/30/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Several psychiatric medications have the potential to prolong the QTc interval and subsequently increase the risk for ventricular arrhythmias such as torsades de pointes (TdP). There is limited guidance for clinicians to balance the risks and benefits of treatments. METHODS After a review of the existing literature, clinical-educators from the Association of Medicine and Psychiatry developed expert consensus guidelines for ECG monitoring of the QTc interval for patients with medical and psychiatric comorbidities who are prescribed medications with the potential to prolong the QTc interval. A risk score was developed based on risk factors for QTc prolongation to guide clinical decision-making. RESULTS A baseline ECG may not be necessary for individuals at low risk for arrythmia. Those individuals with a risk score of two or more should have an ECG prior to the start of a potentially QTc-prolonging medication or be started on a lower risk agent. Antipsychotics are not equivalent in causing QTc prolongation. A consensus-based algorithm is presented for the management of those identified at high (QTc >500 msec), intermediate (males with QTc 450-499 msec or females with QTc > 470-499 msec), or low risk. CONCLUSIONS The proposed algorithm can help clinicians in determining whether ECG monitoring should be considered for a given patient. These guidelines preserve a role for clinical judgment in selection of treatments that balance the risks and benefits, which may be particularly relevant for complex patients with medical and psychiatric comorbidities. Additional studies are needed to determine whether baseline and serial ECG monitoring reduces mortality.
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Affiliation(s)
- Glen L Xiong
- Department of Psychiatry and Behavioral Sciences, University of California at Davis School of Medicine, Sacramento, CA, United States of America.
| | - Aaron Pinkhasov
- Department of Behavioral Health, NYU Winthrop Hospital, Mineola, NY, United States of America
| | - Jed P Mangal
- Department of Behavioral Health, Martin Army Community Hospital, Ft Benning, GA, United States of America
| | - Heather Huang
- Departments of Psychiatry and Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - Jeffrey Rado
- Psychiatry and General Internal Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States of America
| | - Jane Gagliardi
- Departments of Psychiatry and Behavioral Sciences, and Internal Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Dustin Demoss
- Department of Psychiatry, University of North Texas Health Science Center, United States of America
| | - David Karol
- Department of Psychiatry and Behavioral Neuroscience, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America
| | - Shannon Suo
- Department of Psychiatry and Behavioral Sciences, University of California at Davis School of Medicine, Sacramento, CA, United States of America
| | - Michael Lang
- Departments of Psychiatry and Internal Medicine, East Carolina University, Greenville, NC, United States of America
| | - Marsha Stern
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, United States of America
| | - E Vanessa Spearman
- Departments of Internal Medicine and Psychiatry, Medical College of Georgia at Augusta University Medical Center, Augusta, GA, United States of America
| | - John Onate
- Department of Psychiatry and Behavioral Sciences, University of California at Davis School of Medicine, Sacramento, CA, United States of America
| | - Aniyizhai Annamalai
- Departments of Psychiatry and Internal Medicine, Yale School of Medicine, New Haven, CT, United States of America
| | - Zeina Saliba
- Department of Psychiatry & Behavioral Sciences and Department of Emergency Medicine, The George Washington University, Washington, D.C, Department of Obstetrics & Gynecology, Virginia Commonwealth University, Richmond, VA, United States of America
| | - Thomas Heinrich
- Departments of Psychiatry and Behavioral Medicine, Family and Community Medicine, Medical College of Wisconsin, Milwaukee, WI, United States of America
| | - Jess G Fiedorowicz
- Departments of Psychiatry, Epidemiology, and Internal Medicine, University of Iowa, Iowa City, IA, United States of America
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7
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Rado J. Neuropsychiatric Complications of Injection-Associated Diseases: HIV and Hepatitis C. Psychiatr Ann 2017. [DOI: 10.3928/00485713-20161201-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
This issue provides a clinical overview of depression, focusing on screening, diagnosis, treatment, and practice improvement. The content of In the Clinic is drawn from the clinical information and education resources of the American College of Physicians (ACP), including MKSAP (Medical Knowledge and Self-Assessment Program). Annals of Internal Medicine editors develop In the Clinic in collaboration with the ACP's Medical Education and Publishing divisions and with the assistance of additional science writers and physician writers.
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McCarron RM, Bourgeois JA, Chwastiak LA, Folsom D, Hales RE, Han J, Rado J, Rivelli S, Scher L, Yu A. Integrated Medicine and Psychiatry Curriculum for Psychiatry Residency Training: a Model Designed to Meet Growing Mental Health Workforce Needs. Acad Psychiatry 2015; 39:461-465. [PMID: 26015164 DOI: 10.1007/s40596-015-0348-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 04/16/2015] [Indexed: 06/04/2023]
Affiliation(s)
- Robert M McCarron
- University of California, Davis School of Medicine, Sacramento, CA, USA,
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Abstract
Antipsychotics are frequently used in elderly patients to treat a variety of conditions, including schizophrenia. While extensively studied for their impact in younger populations, there is comparatively limited evidence about the effectiveness of these agents in older patients. Further complicating this situation are the high co-morbidity rates (both psychiatric and medical) in the elderly; age-related changes in pharmacokinetics leading to a heightened proclivity for adverse effects; and the potential for multiple, clinically relevant drug interactions. With this background in mind, we review diagnostic and treatment-related issues specific to elderly patients suffering from schizophrenia and other psychotic conditions, focusing on the potential role of aripiprazole.
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Affiliation(s)
- Jeffrey Rado
- Psychiatric Clinical Research Center, Rush University Medical Center, Chicago, IL 60612, USA.
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12
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Janicak PG, Dowd S, Rado J, Welch MJ, Fogg L, O'Reardon J, Avery D, Coffey CE, Sampson S, Boutros N. Repetitive transcranial magnetic stimulation versus electroconvulsive therapy: efficacy of treatment in nonpsychotic patients with depression. Am J Psychiatry 2007; 164:1118; author reply 1118-9. [PMID: 17606665 DOI: 10.1176/ajp.2007.164.7.1118a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Treatment-resistant depression is a serious problem with significant costs in terms of health care dollars and patients' well-being. Vagus nerve stimulation (VNS) is one novel, device-based therapy that may be effective in this population. In this article, we review the evidence to date on the use of VNS in major depression and describe the process of VNS treatment initiation, device implantation, and dosage adjustment and monitoring. It is important for psychiatric nurses to understand the evidence base for and how VNS is used in treatment so they may enhance care of patients with treatment-resistant depression.
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Affiliation(s)
- Jeffrey Rado
- Department of Psychiatry, Rush University, Chicago, IL 60612, USA.
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Fu EJ, Arca MJ, Hain JM, Krinock R, Rado J, Cameron MJ, Chang AE, Sondak VK. Tumor-induced suppression of antitumor reactivity and depression of TCRzeta expression in tumor-draining lymph node lymphocytes: possible relationship to the Th2 pathway. J Immunother 1997; 20:111-22. [PMID: 9087383 DOI: 10.1097/00002371-199703000-00003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
T lymphocytes from tumor-draining lymph nodes (TDLN), after activation and expansion in vitro, can mediate regression of metastatic tumor in animal models. We have shown that TDLNs are subject to tumor-induced suppression that is tumor specific, T-cell mediated, and dependent on the duration of tumor growth, but the mechanism of this suppression remains largely unknown. Recently, in other model systems, tumor-bearer T cells have been shown to have decreased expression of T-cell receptor-zeta (TCR zeta), a key component in antigen-driven activation pathways. We sought to investigate whether the suppression of TDLN reactivity that accompanies prolonged tumor growth was associated with decreased expression of TCR zeta in fresh and in vitro activated lymph node lymphocytes. Mice bearing subcutaneous tumor deposits of MCA 205 had TDLN cells harvested after various durations of tumor growth, then activated in vitro with anti-CD3 for 2 days (activation phase), followed by expansion with interleukin-2 (IL-2) (10 U/ml) for 3 days (expansion phase). Two-color flow cytometry was used to determine TCR zeta expression in fresh and activated TDLN cells. Antitumor reactivity was assessed by the ability of activated TDLN to mediate regression of lung metastases. There was a time-dependent suppression of the antitumor reactivity of the activated TDLN; activated TDLN from mice bearing tumors 14 days or less were able to mediate the regression of established lung metastases, whereas activated TDLN from animals bearing tumors 21 days or more were ineffective. In addition, TCR zeta expression on T lymphocytes from fresh and activated TDLN was also depressed in a time-dependent manner. Because tumor-induced immunosuppression in our model is known to be T cell mediated, we examined whether the Th2 cytokine IL-4, when added in vitro during activation or expansion, could suppress antitumor reactivity and lead to a depression in TCR zeta expression of TDLN cells in a fashion similar to prolonged tumor growth. The addition of 10 U/ml of IL-4 in vitro had a marked suppressive effect on the antitumor activity of day 14 TDLN; the effect was most pronounced when IL-4 was present during the expansion phase. Fluorescence-activated cell sorter analysis of day 14 TDLN exposed to IL-4 in vitro demonstrated a marked decrease in TCR zeta expression, comparable to that seen in late tumor-bearer TDLN. Thus, TDLN from late tumor-bearers show a consistent decrease in TCR zeta expression that is associated with suppressed antitumor reactivity, and exposure to IL-4 in vitro results in qualitatively and quantitatively similar changes. Our observations suggest a mechanism whereby Th2 cells could mediate immunosuppression by downregulating a critical component of the T-cell-receptor signal transduction machinery.
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Affiliation(s)
- E J Fu
- Division of Surgical Oncology, University of Michigan Medical Center, Ann Arbor 48109-0331, U.S.A
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Herman E, Rado J. Fatal hyperkalemic paralysis associated with spironalactone. Observation on a patient with severe renal disease and refractory edema. Arch Neurol 1966; 15:74-7. [PMID: 5937497 DOI: 10.1001/archneur.1966.00470130078008] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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