Omar Viswanath

Omar Viswanath
LSU Shreveport

Doctor of Medicine

About

381
Publications
60,962
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2,464
Citations
Introduction
Omar Viswanath currently works at Valley Pain Consultants - Envision Physician Services, is a Clinical Professor of Anesthesiology at LSU School of Medicine Shreveport, an Associate Clinical Professor of Anesthesiology at Creighton University School of Medicine, and a Clinical Assistant Professor of Anesthesiology at University of Arizona College of Medicine - Phoenix. Omar does research in Anesthesiology and Interventional Pain Medicine.
Skills and Expertise

Publications

Publications (381)
Article
Introduction Anterior Cruciate Ligament tears are common after a non-contact injury and several thousand reconstructions (ACLR) occur yearly in the United States. Multimodal pain management has evolved greatly to include nerve blocks to minimize physical therapy losses post-operatively, pericapsular and wound injections, and other adjunctive measur...
Article
Background Cervical spine instability broadly refers to compromise of the articular congruity. It can be stratified according to spinal level, functional compromise, and mechanism of instability. Conventional wisdom advocates for use of bracing and physical therapy with only a subset of patients proceeding to obtain surgical treatment. Objective T...
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Background The prevalence of suprascapular neuropathy is higher than previously estimated. Recent literature highlights a myriad of treatment options for patients ranging from conservative treatment and minimally invasive options to surgical management. However, there are no comprehensive review articles comparing these treatment modalities. Objec...
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Introduction Liposomal bupivacaine has been integrated into clinical practice within many surgical disciplines to reduce post-operative pain and opioid consumption. This novel agent has been utilized in this regard in many subdisciplines of orthopedic surgery. Total hip arthroplasty has significant opioid use post-operatively as compared to many ot...
Article
Background Back pain in young athletes is common. Adolescents are at an increased risk for back pain related to several factors including rapid growth. Traditionally, the conversation around back pain in the adolescent age group has been centered around diagnosis and treatment; however, there are emerging studies regarding prevention. Objective Th...
Article
Total Knee Arthroplasty (TKA) is an increasingly common procedure performed for advanced osteoarthritis. Optimal perioperative pain management strategies are critical for early mobilization and shorter hospital stays in TKA. Peripheral nerve blocks commonly used in TKA perioperative analgesia including individual and combined femoral, obturator, sc...
Article
Background Facet-mediated pain is a major cause of low back pain and as a result, is a significant cause of morbidity, including disability and reduced functionality. Setting The present investigation involved a PubMed literature review between June 1, and 2021-January 1, 2022. Methods We systematically reviewed was carried Pubmed using the searc...
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Current treatment options of post-viral COVID-19 symptoms lack conclusive evidence of success in infected individuals, leaving a desperate need for alternative treatments. In this study, we propose the use of icosapent ethyl (IPE), a pure esterized form of omega-3 fatty acid eicosapentaenoic acid (EPA), for its current use as a cell membrane stabil...
Article
Migraine headache is a widespread and complex neurobiological disorder that is characterized by unilateral headaches that are often accompanied by photophobia and phonophobia. Migraine is one of the leading chief complaints in the emergency department with negative impacts on quality of life and activities of daily living. The high number of emerge...
Article
A patient with lumbar spinal stenosis (LSS) was referred to our clinic due to refractory low back pain, radicular pain, and neurogenic claudication despite conservative treatment with medical management. Imaging of the lumbar spine revealed spinal canal and foraminal stenosis. Multiple epidural steroid injections (ESI) were performed which did not...
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Post-traumatic stress disorder (PTSD) is a psychiatric disorder that causes significant functional impairment and is related to altered stress response and reinforced learned fear behavior. PTSD has been found to impact three functional networks in the brain: default mode, executive control, and salience. The executive control network includes the...
Article
Lower back pain (LBP) is one of the most common presenting complaints in clinical adult medical patients. While most often diagnosed as “nonspecific mechanical” in etiology, several lesser known, rarer causes of LBP exist, some of which can even cause neuropathic pain. One of these infrequent causes, cluneal neuralgia (CN), is associated most often...
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Background: Spinal cord stimulation (SCS) is an important modality for intractable pain not amenable to less conservative measures. During percutaneous SCS lead insertion, a critical step is safe access to the epidural space, which can be complicated by a dural puncture. Objectives: In this review, we present and analyze the practices patterns in t...
Article
A migraine is a clinical diagnosis with a presentation of one or more severe unilateral or bilateral headache(s) often preceded by an aura and typically accompanied by nausea, vomiting, photophobia, and/or phonophobia. This neurological disease is often debilitating and greatly affects the quality of life of those it inflicts. In fact, a recent stu...
Article
Sacroiliac joint (SIJ) pain is responsible for approximately a third of reported back pain. Patients with SIJ pain report some of the lowest quality of life scores of any chronic disease. Understanding of the physiology and pathology of the SI joint has changed dramatically over the years, and SI joint pain and injury can now be thought of in two b...
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Purpose: The purpose of this study is to determine if using a combination of dexamethasone and dexmedetomidine (Dex-Dex) in a single-shot perineural local anesthestic provides an increased duration of pain relief and reduced consumption of opioids for patients undergoing shoulder surgery. Patients and methods: This is a retrospective trial of ad...
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Introduction: Assessment and management of pain in elderly people with cognitive impairment is particularly challenging. Physiological changes due to ageing as well as comorbidities and polypharmacy are responsible for a complex clinical approach. Concomitantly, in cognitive impairment, including advanced dementia, changes in the central nervous sy...
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: Glottic closure insufficiency increases the risk of aspiration and pneumonia, particularly in the elderly. Medialization thyroplasty is an open surgical procedure for treating glottic incompetency by approximating both vocal folds. The vocal fold medialization is achieved by inserting an implant to bring the nonmobile fold to the unaffected side....
Article
When peripheral neuropathy occurs due to chemotherapy treatment, it is referred to as chemotherapy-induced peripheral neuropathy (CIPN). Typically, symptoms are sensory rather than motor and include reduced feeling and heightened sensitivity to pressure, pain, temperature, and touch. The pathophysiology of CIPN is very complex, and it involves mult...
Article
Purpose of review: Insomnia affects more than 10% of the population and causes significant discomfort and disability. Suvorexant is an orexin receptor antagonist that specifically targets the wake-sleep cycle. This review summarizes recent and seminal evidence in the biological and physiological evidence of insomnia, the mechanism of action of suv...
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p class="abstract">This report intends to summarize the underlying pathophysiology, relevant symptoms, appropriate diagnostic workup, necessary imaging, and medical and surgical treatments of Sphenopalatine neuralgia (SN). This was done through a comprehensive literature review of peer-reviewed literature throughout the most relevant databases. Dr....
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Background: Spinal cord stimulation (SCS) is an established treatment modality for neuropathic pain. The critical part of this technique is safe access to the epidural space for lead placement. There have been innovations in radiological views, improving access to the epidural space. Objectives: This study analyzes the adoption of these technica...
Article
Cancer is the second most common cause of death in the United States and is a challenging disease to treat. The treatment options for various cancers include but are not limited to surgery, radiation, and chemotherapy. The mechanism behind chemotherapy is intended to promote cellular damage to cells that are proliferating uncontrollably. Unfortunat...
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Purpose of Review Sedation for pain medicine procedures provides a unique challenge for proceduralists. Many patients dealing with pain are on chronic opioids and require higher doses of sedation for adequate procedural comfort. Chronic pain patients have various comorbidities including depression, neuropsychiatric disorders, peripheral vascular di...
Preprint
Background: Assessment and management of pain in elderly people with cognitive impairment is particularly challenging. Physiological changes due to aging as well as comorbidities and polypharmacy are responsible for a complex clinical approach. Concomitantly, in cognitive impairment, including advanced dementia, changes in central nervous system al...
Article
Parkinson's disease (PD) is a common neurodegenerative disorder. It is also the fastest-growing neurodegenerative disorder and has more than doubled between 1990 and 2016. Parkinson’s disease causes significant morbidity and disability from motor dysfunction, sleep disturbances, and cognitive and psychiatric symptoms. This paper reviews recent evid...
Article
This report intends to summarize the underlying pathophysiology, relevant symptoms, appropriate diagnostic workup, necessary imaging, and medical and surgical treatments of occipital neuralgia (ON). This was done through a comprehensive literature review of peer-reviewed literature throughout the most relevant databases. The current understanding o...
Article
Background: Headache is a very common condition that affects 5-9% of men and 12-25% of women in North America and Europe. Globally, the prevalence of active headaches among adults is 47%. The most common type of headache is tension headaches (38% of adults), followed by migraines (10%), and chronic headaches (3%). While the majority of headaches a...
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Background: Spinal cord stimulation (SCS) is an established treatment modality for neuropathic pain. Published guidelines exist to aid physicians in proper antibiotic use during and after spinal cord stimulation trials and implants. In this brief review, we present and analyze the current antibiotic practice patterns of clinicians. Methods: The...
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IntroductionSpinal cord stimulation (SCS) is a commonly utilized therapy for the treatment of neuropathic pain conditions. The Neurostimulation Appropriateness Consensus Committee (NACC) has recommended that the placement of percutaneous SCS leads be performed in an awake patient capable of providing feedback. It is not currently known how commonly...
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Given the typical age onset of schizophrenia, there are tremendous economic and social impacts that extend beyond the person and their families. One critical determinant of the diseases' impact is the patient's adherence to antipsychotic drug treatment. Approved in 2015 for the treatment of schizophrenia, paliperidone palmitate (Invega Trinza, a 3-...
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Postpartum depression (PPD) is one of the three major categories on the spectrum of postpartum psychiatric syndromes. Postpartum psychiatric syndromes are classified as either postpartum blues, postpartum depression, or postpartum psychosis. Postpartum depression is important to recognize clinically because of the effect it can have on the mother-c...
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The article previously published in Pain and Therapy was questioned for some scientific aspects. The authors are punctually replying to the criticisms publicly made by some valued Colleagues.
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Spinal stenosis is the compression of nerve roots by bone or soft tissue secondary to the narrowing of the spinal canal, lateral recesses, or intervertebral foramina. Spinal stenosis may have acquired or congenital origins. Most cases are acquired and caused by hypertrophy of the ligamentum flavum, enlarged osteophytes, degenerative arthritis, disk...
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Depression is the most prevalent psychiatric disorder in the world, affecting 4.4% of the global population. Despite an array of treatment modalities, depressive disorders remain difficult to manage due to many factors. Beginning with the introduction of fluoxetine to the United States in 1988, selective serotonin reuptake inhibitors (SSRIs) quickl...
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Chronic pain is a common source of morbidity in many patient populations worldwide. There are growing concerns about the potential side effects of currently prescribed medications and a continued need for effective treatment. Related to these concerns, peripheral nerve stimulation has been regaining popularity as a potential treatment modality. Per...
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Lumbar spinal stenosis (LSS), which often occurs concurrently with degenerative spondy-lolisthesis (DS), is a common disease in the elderly population, affecting the quality of life of aged people significantly. Notwithstanding the frequently good effect of conservative therapy on LSS, a minority of the patients ultimately require surgery. Surgery...
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Purpose of review: This is a comprehensive review of the literature regarding the use of paliperidone in the treatment of schizophrenia and schizoaffective disorder. It covers the background and presentation of schizophrenia and schizoaffective disorder, as well as the mechanism of action and drug information for paliperidone. It covers the existi...
Article
Keratoconjunctivitis sicca (“dry eye”) is a common (14%–30% of adults over age 48) though difficult to treat condition that causes both discomfort and disability with associated dryness, pain, and visual disturbances. Etiology is not clearly understood but is likely varied, with a subset of patients suffering from chronic neuropathic pain referred...
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In treating chronic and acute pain, opioids are widely used. Although they do provide analgesia, their usage does come with adverse events (AEs). One of the most burdensome is opioid-induced bowel dysfunction, and more specifically opioid-induced constipation (OIC). The pathogenesis of these AEs is well known as the consequence of the action of opi...
Chapter
Complex regional pain syndrome (CRPS) is a chronic pain condition that affects the extremities, believed to be caused by damage to, or malfunction of, the peripheral and central nervous systems. And while CRPS is its own unique disease entity, its potential pathophysiological mechanisms have frequently been compared to those of neuropathy and fibro...
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Purpose of review: This is a comprehensive review of the literature regarding the use of Aripiprazole lauroxil for schizophrenia. This review presents the background, evidence, and indications for using aripiprazole lauroxil to treat schizophrenia in the context of current theories on the development of schizophrenia. Recent findings: Schizophre...
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Acute and chronic pain are public health issues that clinicians have been battling for years. Opioid medications have been a treatment option for both chronic and acute pain; however, they can cause unwanted complications and are a major contributor to our present opioid epidemic. The sacroiliac (SI) joint is a common cause of both acute and chroni...
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Implication Statement: Despite the increasing popularity of video laryngoscopes, the supraglottic airway device (SAD) remains a critical airway rescue tool. The SAD provides a conduit for tracheal intubation in failed laryngoscopy. This article aims to help the operator: (1) select an intubating SAD with consistent performance; (2) inform the appro...
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: This is a comprehensive literature review of chronic fatigue syndrome (CFS). We provide a description of the background, etiology, pathogenesis, diagnosis, and management regarding CFS. CFS is a multifaceted illness that has many symptoms and a wide array of clinical presentations. As of recent, CFS has been merged with myalgic encephalomyelitis...
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Complex regional pain syndrome (CRPS) is a chronic pain condition often involving hyper-algesia and allodynia of the extremities. CRPS is divided into CRPS-I and CRPS-II. Type I occurs when there is no confirmed nerve injury. Type II is when there is known associated nerve injury. Female gender is a risk factor for developing CRPS. Other risk facto...
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IntroductionNalbuphine, a synthetic kappa-opioid receptor (KOR) agonist and a partial µ-opioid receptor (MOR) antagonist, has been used for years as an effective analgesic. It has been shown to have a better safety profile than morphine. Considering the long history of use of this drug, it is interesting that only a limited amount of information ex...
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Medical management of epilepsy seeks to eliminate or to reduce the frequency of seizures, help patients maintain a normal lifestyle, and maintain psychosocial and occupational activities, while avoiding the negative side effects of long-term treatment. Current FDA approved drugs have been shown to have similar efficacy; however, they all share a co...
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Post-traumatic stress disorder (PTSD) has become one of the most common psychiatric diagnosis in the United States specifically within the veteran population. The current treatment options for this debilitating diagnosis include trauma-focused psychotherapies along with selective serotonin reuptake inhibitors (SSRI) and serotonin-norepinephrine reu...
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Multiple sclerosis (MS) is a prevalent neurologic autoimmune disorder affecting two million people worldwide. Symptoms include gait abnormalities, perception and sensory losses, cranial nerve pathologies, pain, cognitive dysfunction, and emotional aberrancies. Traditional therapy includes corticosteroids for the suppression of relapses and injectab...
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Chronic knee pain continues to cause increasing levels of functional deficits, mobility issues, and decreased quality of life in the United States. Initial treatment for knee pain consists of physical therapy, weight loss, medication management, injections, and radiofrequency ablation (RFA). Definitive treatment usually requires surgical management...
Article
While transfusion of blood and blood products is instinctively linked to the provision of emergent care, blood and blood products are also routinely used for the treatment of subacute and chronic conditions. Despite the efforts of the World Health Organization and others, developing countries are faced with a three-part problem when it comes to acc...
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Necrotizing Raynaud’s phenomenon is a vascular clinical syndrome characterized by vasospasm of distal resistance vessels, usually triggered by cold temperatures or by psychological conditions such as anxiety and stress. Pain is the first reported symptom, related to insufficient oxygen delivery to the extremities that leads to ischemia of the perip...
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Cancer is now a leading health concern worldwide. In an effort to provide these patients with adequate care, coordination between anesthesiologists and surgeons is crucial. In cancer-related treatment, it is very clear that radio-chemotherapy and medical procedures are important. There are some obstacles to anesthesia when dealing with cancer treat...
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Introduction: In this study, two cases that demonstrate the importance of bedside echocardiography and hands-off telemedicine technology for diagnosis and intervention in patients with coronavirus disease 2019 (COVID-19) are discussed. Case presentation: We report two cases of cardiac emergency associated with COVID-19. Case 1 is a 50-year-old f...
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Background: The efficiency of balneotherapy (BT) for fibromyalgia syndrome (FMS) remains elusive. Methods: Cochrane Library, EMBASE, MEDLINE, PubMed, Clinicaltrials.gov, and PsycINFO were searched from inception to 31 May 2020. Randomized controlled trials (RCTs) with at least one indicator were included, i.e., pain, Fibromyalgia Impact Questionna...
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Context: Neck pain is a common phenomenon and affects a large segment of the population. Chronic neck pain, lasting more than 3 months, likely occurs in 10% - 30% of patients with acute neck pain and affects up to 288 million cases globally, carrying a significant cost in terms of quality of life, disability, and healthcare dollars. Here we review...
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Purpose of Review This review aims to provide relevant, aggregate information about a variety of disinfectants and antiseptics, along with potential utility and limitations. While not exhaustive, this review’s goal is to add to the body of literature available on this topic and give interventional providers and practitioners an additional resource...
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Regional anesthesia is an important aspect of the overall anesthetic plan for patients. It has the potential to offer superior benefits compared to opioid-based treatment and is an important component of Enhanced Recovery after Surgery (ERAS) protocols. The use of the pectoral type I (PECS I) and pectoral type II blocks (PECS II) has been shown to...
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Context: Chronic neuropathic pain is a common condition, and up to 11.9% of the population have been reported to suffer from uncontrolled neuropathic pain. Chronic pain leads to significant morbidity, lowered quality of life, and loss of workdays, and thus carries a significant price tag in healthcare costs and lost productivity. dorsal root gangl...
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The diagnosis of prostate transition zone cancer (PTZC) remains a clinical challenge due to their similarity to benign prostatic hyperplasia (BPH) on MRI. The Deep Convolutional Neural Networks (DCNNs) showed high efficacy in diagnosing PTZC on medical imaging but was limited by the small data size. A transfer learning (TL) method was combined with...
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Context: Abdominal pain is a widespread complaint and is one of the common reasons leading patients to seek medical care, either in emergency situations or with their primary providers. While acute abdominal pain is a better defined, usually surgical condition, chronic abdominal pain requires longer, typically lifelong, therapy. Chronic abdominal...
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Infertility has many etiologies and can have devastating consequences for young couples attempting to bring children into the world. Uterine factor for infertility is related to either uterine agenesis (Mayer- Rokitansky-Küster-Hauser [MRKH] syndrome), unexpected hysterectomy, or presence of a nonfunctioning uterus. In this review, a patient with M...
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ZULRESSO (Brexanolone) is a novel FDA-approved treatment for moderate-to-severe postpartum depression. Postpartum depression may be diagnosed in women experiencing depressive symptoms which can manifest as cognitive, behavioral, or emotional disturbances as early as the third trimester to 4 weeks following delivery. The efficacy of brexanolone sugg...