Introduction
Chronic pain or an inability to manage pain is a very debilitating condition. The sensation of pain is different in people; no people feel the same intensity of pain. It is a personal experience that can be measured only by the individual. Pain is one of the most important signals the body sends to make one aware of a need for an alert in one part of the body. Hence, it is a necessary evil. However, no one would like to continue their life in pain. This is where the innovations in pain management become useful.
What Is Pain?
Pain is an alert that the central nervous system warns the body of a mishap somewhere in the body. It is an unpleasant sensation that can be like a prick, tingle, sting, burn, or ache. When there is pain, people pay attention to the part of the body requiring attention. If there was no pain, no one would know that something was wrong in that part of the body, leading to a disastrous situation and further complications.
Pain can be severe or mild, a sharp stab or a dull ache, continuous or intermittent. People respond differently to pain based on their pain thresholds (the lowest point at which a stimulus causes pain). Pain is a subjective sensation, as some people have a high tolerance for pain, while others might not be able to bear even mild pain. Such people might depend on painkillers to manage even small pain.
What Are the Recent Innovations in Pain Management?
The advancements in medical science have enabled the understanding of the electrical signals in the nervous system that cause pain and the use of the same to relieve pain. Some technologies are already accepted, while others are still in their research phase.
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Neuromodulation: Neuromodulation is defined as altering the nerve activity through a targeted stimulation. The field of neuromodulation has been expanding massively over the past two decades, with more indications like persistent spine pain syndrome (PSPS), complex regional pain syndrome (CRPS, a type of chronic pain that affects hands or legs), refractory axial neck and low back pain, neuropathic limb pain (shooting pain in the limbs), and painful diabetic neuropathy (a condition that occurs due to nerve damage in diabetes). In addition, improvements in technology, standardization of surgical techniques, miniaturization of devices, innovations in waveforms, unprecedented neural targets, a better understanding of the mechanism of actions (MoA), etc., have enabled better outcomes, satisfaction, cost-effectiveness, and pain reduction with improved function and quality of life in patients. Spinal cord stimulation (SCS) is one of the commonly used interventional pain management for chronic spinal pains. Innovative waveforms, when coupled with SCS, are one of the advancements that relieve chronic pain with a better outcome. The ability to optimize the stimulation based on the patient’s therapeutic window is an added advantage.
A. Dorsal Root Ganglion Stimulation (DRGS): This form of pain management was approved in Europe and the U.S. about a decade ago. It has been approved by the United States Food and Drug Administration (FDA) to manage CRPS. DRGS is a method of chronic pain management that stimulates a cluster of nerves at the dorsal end of a spinal nerve. This is one of the best therapeutic options for chronic pains that are difficult to manage in the lower parts of the body. Studies are ongoing to extend its use to include many chronic post-surgical pain syndromes like mastectomy (breast removal), inguinal hernia repair, and knee replacement surgery. Conditions like chronic low back pain and pelvic pain are managed using this therapy. However, this requires more research.
B. Peripheral Nerve Stimulation: It stimulates the nerves in the peripheral nervous system to relieve pain. This is used in managing conditions like facial pain, chest wall pain, headaches, phantom limb pain, peripheral nerve pain after trauma, and pelvic or urogenital pain, as well as back pain.
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SI Joint Fusion: The sacroiliac joint connects the sacrum and the ilium (spine and the pelvis). It functions as a shock absorber and redistributes the force coming from the spine to the lower extremities, and vice-versa. SIJ dysfunction is one of the most common reasons for pain in the lower back. This treatment option gained prominence following recent advances in minimally invasive surgical techniques. It is used as an alternative to pain management using opioids.
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Biotechnology: Exploration of new modalities in pharmaceutical therapies has been possible following advancements in biotechnology. Studies in animals using gold nanorods conjugated with TNF siRNA have been proven to be effective in chronic pain management. Improved pharmaceutical properties, like longer release time and better uptake, have been seen when Tramadol hydrochloride is combined with nanoparticles with endogenous ligands rather than using Tramadol alone. Automated patch clamping (APM) is a recent advancement in pain research that helps in recording ion channel potentials. It is gaining momentum in developing small-molecule analgesics. Microfluid devices that are voltage-controlled help to provide precise and remote temporal control of medication release. This enables options for personalized treatment for chronic pain.
How Is Telemedicine Beneficial for Pain Management?
Virtual health and mobile applications have provided an option for improved and better communication between healthcare professionals, and patients set apart due to geographic distances. With the advancements in technology, these applications are becoming more efficient and accurate. Automated text messaging is a promising method to monitor opioid utilization after surgery. Online support forums, phone-based telehealth, and automated symptom check-in applications enabled a decrease in pain and depression among cancer patients. Providing neurofeedback therapy for managing pain has been shown to reduce pain and provide easier access to these kinds of treatments in rural areas.
Conclusion
Pain is a complex issue that requires interventional management. It is one of the main causes of disability in adults. It increases the weight of medical costs and reduces productivity. Hence, it requires to be managed appropriately. Combining various treatment options to relieve pain is unique for each person, depending on their disease conditions and comorbidities. Advancements in this field are promising and provide hope for those in pain. Research in pain physiology and pain management support each other. With the advent of more approaches to relieve pain, healthcare professionals will be able to ease the burden on the patients, their families, and the whole healthcare system.
