Challenges in Implementing Thoracic Segmental Spinal Anesthesia in Routine Anesthesia Practice

Thoracic segmental spinal anesthesia (TSSA) is an emerging neuraxial anesthesia technique where low doses of anesthetic medications are injected into the thoracic subarachnoid space. TSSA ensures several advantages, including precise segmental blockade of intended surgical areas and reduced sympathectomy resulting in better cardiovascular stability.[1,2] Lower systemic drug exposure leads to faster recovery, reduced risk of toxicity, and fewer postoperative complications.[3] TSSA with low doses of local anesthetics (LAs) provides effective pain relief, optimal surgical conditions without unnecessary motor blockade, and decreased systemic opioid requirements.[4] It is particularly beneficial for high-risk patients who may not tolerate general anesthesia (GA) well, potentially enhancing safety, shortening hospital stays, and reducing postoperative care needs, improving patient satisfaction.[5] However, its widespread adoption faces multiple challenges. Addressing these challenges is required to gear the full potential of TSSA in routine clinical practice. This draft discusses a few challenges and mitigating strategies for TSSA implementation in anesthesia practice. Despite its documented benefits in a selective patient population, TSSA is often perceived as a risky procedure owing to the chances of spinal cord injury, high spinal block, and cardiovascular instability. This perception can discourage anesthesiologists and surgeons from using TSSA. Furthermore, this reluctance is made worse by the lack of large-scale clinical trials contrasting TSSA with conventional methods. However, literature is available in the form of case reports, case series, and observational studies.[6-8] TSSA requires a high level of precision and anatomical understanding due to the proximity of the thoracic spinal cord at the needle entry site.[9] In contrast to the lumbar spinal segment, the interspinous spaces are narrower and angulated, requiring needle placement slowly and at a cephalad angulation.[10] Concerns about inadvertent high spinal anesthesia can be mitigated by adequate training and knowledge of the physiological concepts behind TSSA. Accurate dosing of LAs, including concentration, total volume, baricity, and adjuvants, must be selected according to the surgical requirements. For expected excessive prolonged cases, TSSA can be combined with epidural.[11] Some clinicians overestimate the risks of TSSA in comparison to lumbar spinal anesthesia. Training programs for trainee anesthesiologists often focus on lumbar spinal anesthesia, leaving a significant gap in the skillset required for TSSA. Structured workshops, simulation-based training, and conferences can help in understanding the fine details of TSSA, increasing its safety. It has been emphasized that the TSSA is not suitable for all patients, and careful patient selection is paramount.[12] Preexisting thoracic spine abnormalities, lesions at the intended needle entry site, or other contraindications to neuraxial techniques must be meticulously considered before considering TSSA. Utilizing TSSA routinely in children needs further high-level evidence.[13] Patient awareness and informed consent must be ensured beforehand. Communicating the benefits and risks of TSSA is essential to ensure adherence to standard clinical practice. A thorough, structured education for the patients and practitioners about the technique can reduce undue anxiety and reluctance to utilize the procedure. Senior anesthesiologists often have deeply ingrained practices, and healthcare institutions have their own sets of protocols that favor traditional methods such as lumbar spinal or GA. Convincing them to adopt TSSA involves providing robust evidence and addressing institutional inertia.[14] Anesthesia care provider’s leadership role and a multidisciplinary approach are crucial for overcoming these barriers. The absence of standardized protocols and guidelines for TSSA is another important hurdle to its wider adoption. Regulatory bodies need to develop comprehensive guidelines addressing detailed techniques, indications, contraindications, and complications mitigation strategies. Moreover, incorporating TSSA into anesthesia curricula and developing certification programs can help standardize training and ensure competency. A strengths, weaknesses, opportunities, and threats analysis could help in designing strategies for the successful implementation of TSSA in routine anesthesia practice [Table 1].Table 1: Strengths, weaknesses, opportunities, and threats analysis of thoracic segmental spinal anesthesia implementationCONCLUSION TSSA has immense potential to transform perioperative care, offering a safer and more feasible alternative to traditional anesthesia techniques. However, its widespread implementation faces challenges that demand concerted efforts from anaesthesiologists, institutions, and policymakers. Existing regional and international anesthesia societies should work together to create and disseminate guidelines for TSSA practice. By addressing these barriers systematically, we can move toward the broader adoption of TSSA, ultimately improving patient outcomes and advancing the field of anesthesiology. Financial support and sponsorship Nil. Conflicts of interest There are no conflicts of interest.