An interventional study of Abbott Laboratories Infinity™ implantable deep brain stimulation system in Treatment Resistant Depression and Undergoing Deep Brain Stimulation (DBS) Surgery, sponsored by Nader Pouratian. Recruiting at 1 site in United States. Open to participants aged 21 Years to 70 Years. Per ClinicalTrials.gov, last updated 2026-07-15.
Sponsored by Nader Pouratian · Not applicable, Interventional, and Device feasibility
Treatment resistant depression remains a major problem for individuals and society. Surgical procedures may provide relief for some of these patients. The most frequently considered surgical approach is deep brain stimulation (DBS) of a part of the brain called the subcallosal cingulate region. However, the effectiveness and safety is not well established. The investigators will use a novel approach using advanced imaging technique (magnetic resonance tractography) to evaluate the feasibility and safety of this surgical approach. An innovative method for the definition of DBS target will be applied that redefines the concept of targeting as one of targeting a symptomatic network rather than a structural brain region using subject-based brain anatomy to define the target location. The correlation between imaging findings at baseline with the mood score changes at different time points of the study will be investigated.
448 studies on the registry are indexed under Depressive Disorder, Treatment-Resistant; 147 are open to participants now.
This study's planned enrollment of 12 is below the median of 59 across 372 interventional studies indexed under Depressive Disorder, Treatment-Resistant.
Browse Depressive Disorder, Treatment-Resistant studies →Nader Pouratian is the lead sponsor of 4 studies on the registry; 3 are open to participants now.
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Exclusion Criteria:
Neurological/Medical condition that makes the patient, in the opinion of the surgeon, a poor candidate;
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.
Short tests of memory and thinking, each scored out of 30. Lower scores suggest more difficulty; criteria give a range, either to include people with memory problems or to leave them out.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
DSM diagnostic criteria
The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
MMSE and MoCA
Short tests of memory and thinking, each scored out of 30. Lower scores suggest more difficulty; criteria give a range, either to include people with memory problems or to leave them out.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Subjects randomized to this arm are initially "OFF" DBS after the open label period then gradually decreased in their optimized setting's amplitude for 8 weeks and then "ON" DBS for 8 weeks.
Device: Abbott Laboratories Infinity™ implantable deep brain stimulation system
Subjects randomized to this arm are initially "ON" DBS with optimized stimulation settings for 8 weeks after the open label period and then "OFF" DBS with gradually decreasing amplitude for 8 weeks.
Device: Abbott Laboratories Infinity™ implantable deep brain stimulation system
Deep brain stimulation (DBS) refers to the process of delivering an electrical current to a precise location in the brain.
Change in Montgomery and Asberg Depression Rating Scale (MADRS) score.
The primary endpoint will be defined as at least a 40% reduction in the Montgomery and Asberg Depression Rating Scale (MADRS) that measures depression severity. The MADRS scores range from 0 to 60, where increased values indicate more severe depression. There are 10 questions that each yield a score of 0-6 that are then summed for a total score.
Time frame: 18 months
Change in another related clinical assessment: PHQ-9
Change in PHQ-9: Patient Health Questionnaire 9. The PHQ-9 the 9-item depression module from the full PHQ. Major depression is diagnosed if 5 or more of the 9 depressive symptom criteria have been present at least "more than half the days" in the past 2 weeks, and 1 of the symptoms is depressed mood or anhedonia. Other depression is diagnosed if 2, 3, or 4 depressive symptoms have been present at least "more than half the days" in the past 2 weeks, and 1 of the symptoms is depressed mood or anhedonia. One of the 9 symptom criteria ("thoughts that you would be better off dead or of hurting yourself in some way") counts if present at all, regardless of duration. The clinician is expected to rule out physical causes of depression, normal bereavement, and history of a manic episode. As a severity measure, the PHQ-9 score can range from 0 to 27, since each of the 9 items can be scored from 0 (not at all) to 3 (nearly every day).
Time frame: 18 months
Change in another related clinical assessment: QIDS-SR
Change in QIDS-SR: Quick Inventory of Depressive Symptomatology Self Report. The QIDS-SR is a 16-question shortened self-test, derived from the 30-item Inventory of Depressive Symptomatology (IDS), which measures 9 different criterion domains of major depression. Each of the 4 possible answers to each quiz is given an ascending numerical value from 0-3, where increased values indicate the severity of depressive symptom.
Time frame: 18 months
Change in another related clinical assessment: HAM-A
Change in HAM-A: Hamilton Anxiety Rating Scale. The HAM-A is a 14-item test designed to assess the severity of anxiety symptoms. All questions are rated on a 5-point (0-4) scale, with 7 questions on psychic anxiety and 7 questions on somatic anxiety. Total scores range from 0 to 56. Patients with anxiety and panic disorder tend to have a score greater than 20.
Time frame: 18 months
Change in another related clinical assessment: CSSRS
Change in CSSRS: Columbia Suicide-Severity Rating Scale. The C-SSRS is a semistructured clinical interview that utilizes a set of prompts and questions to help an interviewer get more complete information on events suggestive of suicidality. This prospective tool aims to standardize terminology and articulate suicidality assessment in a straightforward manner. The categories within the assessment involve binary responses (yes/no) that establish the intensity of suicide ideation on a scale of 1-5, where 5 is most severe.
Time frame: 18 months
Change in another related clinical assessment: HAMD-17
Change in HAMD-17:Hamilton Rating Scale for Depression. The HAMD-17 is a 17-item scale that evaluates depressed mood, vegetative and cognitive symptoms of depression, and comorbid anxiety symptoms. The HAMD-17 was one of the first rating scales developed to quantify the severity of depressive symptomatology. First introduced by Max Hamilton in 1960, it has since become the most widely used and accepted outcome measure for evaluating depression severity. It provides ratings on current DSM-IV symptoms of depression, with the exceptions of hypersomnia, increased appetite, and concentration/indecision. The HAMD-17 was designed to be administered by a trained clinician using a semi-structured clinical interview. The 17- items are rated on either a 5-point (0-4) or a 3-point (0-2) scale.
Time frame: 18 months
Change in another related clinical assessment: SCID-II
Change in SCID-II: Structural Clinical Interview for Personality Disorders.This is a semi-structured interview for making DSM-IV Axis II (Personality Disorder) diagnoses and is designed to be administered by a clinician or trained mental health professional. A SCID II takes 1/2 to 1 hour to administer. There are 3 components to the SCID-II. The interview itself covers the 11 DSM-IV Personality Disorders. After the subject fills out the Personality Questionnaire (which usually takes 20 minutes), the clinician simply circles the numbers to the left of the SCID-II items that correspond to items answered "yes" on the questionnaire. The clinician needs only to inquire about the items screened positive on the questionnaire. The assumption is that a subject who responds with a "no" on the questionnaire item would also have answered "no" to the same question had it been read aloud by the interviewer. For this study, only the subsection for Cluster B will be administered.
Time frame: 18 months
Change in another related clinical assessment: CGI
Change in CGI: Clinical Global Impression of Severity and Improvement. The CGI is used to measure the global impression of a treatment response in a psychiatric patient's illness by a clinician. Two of three sub-scales are being used to measure severity of the illness and improvement of the illness. Items in the two-subscales being administered are rated on a seven-point scale ranging from "1=normal" to "7=extremely ill" for severity subscale and "1=very much improved" to "7=very much worse" for improvement sub-scale.
Time frame: 18 months
Change in another related clinical assessment: PGI
Change in PGI: Patient Global Impression Index. The PGI is used to measure the global impression of a treatment response in a psychiatric patient's illness by the patient. Two sub-scales are being used to measure severity of the illness and improvement of the illness. Items in the two-subscales being administered are rated on a seven-point scale ranging from "1=normal not ill at all" to "7=among the most extremely ill" for severity sub-scale and "1=very much improved" to "7=very much worse" for improvement sub-scale.
Time frame: 18 months
Change in another related clinical assessment: MoCA
Change in MoCA: Montreal Cognitive Assessment. The MoCA was designed as a rapid screening instrument for mild cognitive dysfunction. It assesses different cognitive domains: attention and concentration, executive functions, memory, language, visuoconstructional skills, conceptual thinking, calculations, and orientation. Time to administer the MoCA is approximately 10 minutes. The total possible score is 30 points; a score of 26 or above is considered normal.
Time frame: 18 months
Change in another related clinical assessment: SAFTEE-SI
Change in SAFTEE-SI: Systematic Assessment for Treatment Emergent Events - Specific . The SAFTEE is a structural clinical interview developed by the National Institute of Mental Health which exams possible treatment-emergent side effects for clinical studies. The SAFTEE-SI looks at specific adverse symptoms for a particular treatment/ clinical trial where the summary scores represent the number of adverse events experienced.
Time frame: 18 months
Change in another related clinical assessment: SF-36
Change in SF-36: Short Form 36. The SF-36 Health Survey is a 36-item, patient-reported survey of patient health. The SF-36 is a measure of health status and is commonly used in health economics as a variable in the quality-adjusted life year calculation to determine the cost-effectiveness of a health treatment. The SF-36 consists of eight scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The lower the score the more disability. The higher the score the less disability i.e., a score of zero is equivalent to maximum disability and a score of 100 is equivalent to no disability.
Time frame: 18 months
Change in another related clinical assessment: QOL
Change in QOL: Quality of Life Enjoyment and Satisfaction Questionnaire. The short form of the QOL is a self-report form composed of 16 items each rated on a 5-point scale that indicates the degree of enjoyment or satisfaction experienced during the past week. A total score of items 1 to 14 is computed and expressed as a percentage of the maximum possible score of 70. The 14 items evaluated each subjects' satisfaction with his or her physical health, social relations, ability to function in daily life; ability to get around physically; mood; family relations; sexual drive and interest; ability to work on hobbies, work, leisure time activities; economic status; household activities; living/housing situation; and overall sense of well-being.
Time frame: 18 months
Change in another related clinical assessment: HLQ
Change in HLQ: Health and Labor Questionnaire. The HLQ is designed to collect quantitative data on the relation between illness and treatment and work performance. The HLQ data permits the estimation of production losses (costs) of paid and unpaid labor. It contains also an indicator for impediments for paid and unpaid labor, one of the indicators for quality of life. The HLQ is divided into 4 modules to collect data about absence from work, reduced productivity at paid work, unpaid labor production and impediments to paid and unpaid labor. The modular structure permits the omission of questions that are not applicable to the study population. The questionnaire is suitable for self-assessment.
Time frame: 18 months
Change in another related clinical assessment: YMRS
Change in YMRS: Young Mania Rating Scale. The Young Mania Rating Scale (YMRS) is a rating scale to assess manic symptoms. The scale has 11 items and is based on the patient's subjective report of their clinical condition over the previous 48 hours. The items are selected based upon published descriptions of the core symptoms of mania. Each item given a severity rating. There are four items that are graded on a 0 to 8 scale (irritability, speech, thought content, and disruptive/aggressive behavior), while the remaining seven items are graded on a 0 to 4 scale. The authors encourage the use of whole or half point ratings once experience with the scale is acquired. Typical baseline scores can vary a lot and depend on the patients' clinical features such as mania (YMRS = 12), depression (YMRS = 3), or euthymia (YMRS = 2). Sometimes a clinical study entry requirement of YMRS \> 20 generates a mean YMRS baseline of about 30.
Time frame: 18 months
Change in another related clinical assessment: PSQI
Change in PSQI: Pittsburgh Sleep Quality Index. The PSQI is a 19-item questionnaire evaluating sleep quality and disturbances over the past month.The first 4 items are open questions, whereas items 5 to 19 are rated on a 4-point Likert scale. Individual items scores yield 7 components. A total score, ranging from 0 to 21, is obtained by adding the 7 component scores. A score \> 5 suggests poor sleep quality. The psychometric properties of the PSQI have been documented in multiple studies, including one with a French-Canadian sample. The PSQI was used because it measures a construct (sleep quality) that is related to insomnia but a construct that is broader than insomnia severity. It was administered to the community sample only.
Time frame: 18 months
Change in another related clinical assessment: ISI
Change in ISI: Insomnia Severity Index. The ISI is a 7-item self-report questionnaire assessing the nature, severity, and impact of insomnia. The usual recall period is the "last month" and the dimensions evaluated are: severity of sleep onset, sleep maintenance, and early morning awakening problems, sleep dissatisfaction, interference of sleep difficulties with daytime functioning, noticeability of sleep problems by others, and distress caused by the sleep difficulties. A 5-point Likert scale is used to rate each item (e.g., 0 = no problem; 4 = very severe problem), yielding a total score ranging from 0 to 28. The total score is interpreted as follows: absence of insomnia (0-7); sub-threshold insomnia (8-14); moderate insomnia (15-21); and severe insomnia (22-28). Three versions are available-patient, clinician, and significant others-but the present paper focuses on the patient version only.
Time frame: 18 months
Change in another related clinical assessment: LAPS
Change in LAPS: Leuven Affect and Pleasure Scale. The LAPS is a comprehensive depression assessment scale that integrates several theoretical frameworks on negative and positive affect an on anhedonia. The LAPS comprising of 16 items grouped in 6 categories addresses not only negative affects (depressed mood and anxiety) but also the positive affects, anhedonia, cognitive and overall functioning on a scale of 0-10, where 10 is very much experiencing a feeling/ affect and 0 is not at all.
Time frame: 18 months
Change in another related clinical assessment: SHAPS
Change in SHAPS: Snaith-Hamilton Pleasure Scale. The 14-item SHAPS is a self-administered instrument that was used to measure hedonic experience or positive valence. Each of the items has a set of four response categories--Strongly Agree, Agree, Disagree, and Strongly Disagree, with either of the Agree responses receiving a score of 0 and either of the Disagree responses receiving a score of 1. Total scores ranged from 0 to 14, with higher scores indicating a lower level of hedonic experience or a higher level of anhedonia.
Time frame: 18 months
Change in another related clinical assessment: TEPS
Change in TEPS: Temporal Experience of Pleasure Scale. The TEPS has 18 items and two subscales designed to distinguish between anticipatory and consummatory pleasure. It uses a 6-point Likert scale (from 1 = very false for me to 6 = very true for me). Items only reflect physical anhedonia. A significant advantage of this scale is that its two-factor structure that separates anticipatory and consummatory aspects of reward.
Time frame: 18 months
Plan to share: No — Investigators with established research programs will be eligible for data sharing. Interested investigators will be required to submit a summary of proposed work and requested data elements. If approved by the Principal Investigator of the study, data will be shared. This data will be de-identified and coded. There is no plan to share identifiers outside the study team
No publications or documents are linked to this record.
Started Oct 2022 (actual). Primary completion is estimated for Jul 2027, 57 months after the start.
Of 135 non-industry interventional studies with no phase under Depressive Disorder, Treatment-Resistant, half reached primary completion within 42 months of starting (the median), counting those still running; a quarter within 22 and three quarters within 79. This study's planned 57 months is above that.
Counting every sponsor, half of 139 studies reached it within 50 months; a quarter within 22 and three quarters within 88.
How these figures are worked out, and which studies are left out of them.
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Depressive Disorder, Treatment-Resistant →
Nader Pouratian