Dermatomal Level Research Articles

Quantitative sensory testing in notalgia paresthetica reveals small fiber-type-specific differences in non-pruritic sensitivity: a pilot study.

Notalgia paresthetica (NP) is a chronic condition characterized by pruritus and other unpleasant dysesthetic sensations unilaterally on the subscapular back. Its specific underlying mechanisms are largely unknown, though hypothesized to be neuropathic. Determination of possible somatosensory contributors to the condition could pave the way for novel treatments. Given the potential involvement of non-pruritic mechanisms in NP, our objective was to broadly characterize the somatosensory function in NP-affected and unaffected skin using methods that have been standardized in pain-free controls and painful neuropathic disorders. We hypothesized that if NP is caused by neuropathic mechanisms not targeted directly to pruritoceptors in the skin, somatosensory abnormalities would not be itchspecific. Second, given the lack of symptoms on the contralateral side of the back, we hypothesized that this region would be normally sensitive. In this study, quantitative sensory testing (QST) was used to comprehensively assess the somatosensory function in 15 adult patients with NP. Standardized QST metrics were performed in the NP-affected region and compared with the contralateral asymptomatic skin and itch-free individuals using an age, gender, and site-matched reference data set. There were no significant differences in sensitivity between symptomatic and asymptomatic skin, except for increased mechanical-evoked itch on the itchy side. However, reference data set comparisons revealed bilateral hyposensitivity to innocuous cold and noxious pinprick and higher temporal summation of pain in patients with NP. In addition, compared with reference data, patients with NP demonstrated decreased sensitivity to cold and pinprick, presence of paradoxical heat sensations, and increased wind-up of pain. These results suggest a role for Aδ fiber pathways and central sensitization in NP-associated itch. More research is needed to determine whether sensory differences extend beyond the NP-affected dermatomal level and what might cause neuropathy specifically targeting Aδ fibers.

Effects of Continuous versus Single Dose Spinal Anesthesia in Octogenarians Undergoing Hip Surgery: Randomized Control Trial

Abstract Background Continuous spinal anesthesia (CSA) is an anesthetic technique that offers several clinical advantages for anesthesia and analgesia in elderly patients. The level of sensory blockade can be titrated to the desired dermatomal level with great precision with intrathecal (IT) catheters, allowing better control of the hemodynamic consequences of sympathetic blockade associated with spinal anesthesia compared to epidural or single shot spinal techniques. Octogenarians are expected to suffer more from hemodynamic instability with spinal anesthesia. Objective The primary outcome is to compare the incidence of hypotension (defined as decrease in mean arterial blood pressure > 20% from the base line) in continuous spinal anesthesia CSA versus single dose spinal anesthesia in octogenarians undergoing hip surgery. The secondary outcome is to determine the total use of vasopressor (Ephedrine) and the incidence of spinal complications as nausea, vomiting and post Dural puncture headache. Methods This is a randomized controlled clinical trial done at Ain-shams University Hospitals, Cairo, Egypt within a period of 6 months from approval of medical ethics committee. Twenty patients in CSA group received increments of (0.5 ml) of plain bupivacaine 0.5% until T10 level blockade is achieved. Twenty patients in SDA group received single shot of (2.5ml) of bupivacaine 0.5%. Results The main finding of this study is that while MAP was significantly lower between 5-35 minutes (<0.001), it was significantly higher between 40-75 minutes in SDA group than CSA group (0.05).Total bupivacaine dose was significantly higher in SDA (12.5±0.8) group than CSA group (7.6±1.3) (p < 0.001). The total ephedrine dose needed was significantly higher in the SDA group (19.5 ±11.3) than in CSA group (4.5±1.7) (p.0.006). Conclusion The main finding of this study is that for octogenarians undergoing hip surgery, while MAP was significantly lower between 5-35 minutes, it was significantly higher between 40-75 minutes in single dose spinal anesthesia group than continuous spinal anesthesia group. Episodes of bradycardia were similar in both groups. The bupivacaine dose as well as total ephedrine dose was significantly higher in SDA group than CSA group. Groups were similar in the incidence of postoperative complications related to the neuraxial blockade. The impact of these changes on the overall cardiovascular status and outcome in octogenarians undergoing hip surgery could not be determined from our study design.

Midpoint transverse process to pleura block for postoperative analgesia following laparoscopic renal cyst decortication: Two case reports

BACKGROUND The midpoint transverse process to pleura (MTP) block, a novel technique for thoracic paravertebral block (TPVB), was first employed in laparoscopic renal cyst decortication. CASE SUMMARY Thoracic paravertebral nerve block is frequently employed for perioperative analgesia during laparoscopic cyst decortication. To address safety concerns associated with TPVBs, we administered MTP blocks in two patients prior to administering general anesthesia for laparoscopic cyst decortication. The MTP block was performed at the T9 level under ultrasound guidance, with 20 mL of 0.5% ropivacaine injected. Reduced sensation to cold and pinprick was observed from the T8 to T11 dermatome levels. Immediately postoperative Numeric Pain Rating Scale scores were 0/10 at rest and on movement, with none exceeding a mean 24 h numeric rating scale > 3. CONCLUSION MTP block was effective technique for providing postoperative analgesia for patients undergoing laparoscopic renal cyst decortication.

Efficacy of Erector Spinae Plane (ESP) Block for Non-cardiac Thoracic and Upper Abdominal Surgery: A Single Institute Comparative Retrospective Case Series.

Introduction Erector spinae plane (ESP) block was first introduced for the management of thoracic pain but has become increasingly popular for the treatment of abdominal surgical pain. Previous studies have shown the ESP block can be easily adapted to abdominal procedures at the corresponding dermatome level and provide postoperative analgesia. Though the versatility, simplicity, and safety of the ESP block have been demonstrated, there is a gap in the literature regarding its comparison between thoracic and abdominal surgeries. This study aims to evaluate the efficacy of the ESP block in treating acute postoperative pain in patients undergoing thoracic and abdominal surgeries. Methods This retrospective study included 50 patients in the non-cardiac thoracic surgery group (bilateral breast mastectomy with reconstruction) and 50 patients in the abdominal surgery group (robotic or laparoscopic sleeve gastrectomy). Data was obtained via the acute pain service records at a tertiary care center from 2018 to 2022.All patients received bilateral ESP blocks, performed under ultrasound guidance. Various parameters were evaluated including oral morphine equivalents (OMEs) and visual analog scale (VAS) scores during post-anesthesia care unit (PACU), 6, 12, and 24 hours postop. The use of abortive antiemetic medications within 24 hours was also measured to evaluate the incidence of nausea and vomiting. The results were analyzed and compared. No control group is included, as all patients at our institution receive a peripheral nerve block as a part of the institution's enhanced recovery pathway (ERP). Results This retrospective study included 50 patients in the non-cardiac thoracic surgery group (bilateral breast mastectomy with reconstruction) and 50 patients in the abdominal surgery group (robotic or laparoscopic sleeve gastrectomy). Compared to the thoracic group, the abdominal group had a statistically higher VAS score in PACU with mean difference (MD)1.3 VAS, 95% confidence interval (CI) 0.03-2.56, p-value 0.0443, statistically higher OME consumption in the PACU (difference 13.35 OME, 95% CI 4.97-21.73, p-value 0.0003), and requiredsignificantly more antiemetic pharmacotherapy (mean 1.4 antiemeticsadministered, 95% CI 0.84-2.04, p-value <0.0001). Despite the abdominal group having more OME utilization in the PACU, there was no difference in cumulative OME use in the first 24hours (95% CI-9.745-24.10, p-value 0.4021). Conclusion In this study, we demonstrated that ESP blocks are an effective regional anesthesia technique to reduce postoperative pain and opioid consumption. The ESP block can serve as a useful and safe alternative to either thoracic epidural or paravertebral blocktechniques in thoracic and upper abdominal surgeries for perioperative pain management.

Comparative evaluation of pre-emptive analgesic efficacy of Posterior Transversus Abdominis Plane block with Fascia Transversalis Plane Block in adult patients undergoing unilateral inguinal hernia repair: A prospective, randomized, single-blind, two-arm parallel study.

Abdominal wall blocks, in conjunction with multimodal analgesia, have demonstrated efficacy in providing post-operative analgesia, reducing opioid requirements in patients undergoing inguinal hernia repair. The inguinal region is primarily innervated by the ilioinguinal nerve (IIN) and iliohypogastric nerve (IIH). Posterior transverse abdominis plane block (pTAP) and fascia transversalis plane block (TFP) have been observed to reliably block IIN and IIH. We hypothesized that posterior TAP block (pTAP) owing to its potential paravertebral spread will provide better post-operative analgesia than TFP block in patients undergoing unilateral open inguinal hernia repair. This prospective, randomized, single-blind, two-arm parallel study was conducted over a duration of one year for which sixty patients undergoing unilateral open inguinal hernia repair under spinal anesthesia were enrolled. They were equally and randomly assigned to receive either preoperative pTAP block or TFP block. The primary aim of the study was to compare median static and dynamic NRS scores during a 24-hour period, with the secondary aim to compare the number of patients who required rescue analgesics in each group. All enrolled patients completed the study. Results showed no statistically significant difference in median static NRS scores between Group pTAP and Group TFP at the designated time of observation during the 24-hour period [1.2 (0.4-1.60 vs. 1 (0.6-1)]. Group pTAP reported a higher median dynamic NRS scores during the 24-hour period [2.6 (1.2-3) v/s 2 (1.6-2.4); P < 0.035], although this difference was clinically insignificant. The mean time to request for the first rescue analgesia was comparable (11.7 h v/s 12 h; P = 0.99). In all the patients of both groups, loss of pinprick and cold touch sensation was observed at T10, T12, and L1 dermatomal levels. However, sensory assessment at T6 and T8 levels showed variability between the two groups (P > 0.05). In conjunction with background analgesia and the use of dexamethasone as an adjuvant, both blocks (pTAP and TFP) were observed to be equally effective for post-operative pain relief with similar patient satisfaction scores.

Comparison of block characteristics and outcomes in opioid-free and opioid-based thoracic continuous spinal anaesthesia in patients undergoing major abdominal surgery: A double-blinded randomised controlled trial.

Thoracic continuous spinal anaesthesia (TCSA) is emerging as the sole anaesthetic for major abdominal surgery due to its better perioperative outcomes. This study was designed to evaluate block characteristics and outcomes in 'opioid-free' and 'opioid-based' TCSA. After ethical approval, trial registration and written informed consent, 50 adult patients undergoing major abdominal surgery were randomised into 'opioid-free' (bupivacaine alone) and 'opioid-based' (bupivacaine with fentanyl) groups. After confirmation of T4-L1 dermatome level of spinal anaesthesia, sedation by intravenous (IV) midazolam (0.02-0.05 mg/kg), ketamine (0.25 mg/kg) and dexmedetomidine (bolus dose of 1 µg/kg IV over 10 min followed by 0.2-0.7 µg/kg/h infusion) were started. The primary outcome measured was postoperative pain scores for 72 h in both groups. The secondary objectives were rescue opioid requirement, and the dose of bupivacaine required to achieve T4 level. Data were compared using the two-sided Student t-test, Mann-Whitney and Fisher's exact tests. The 'opioid-based' group performed significantly better compared with the 'opioid-free' group concerning pain scores at rest at 0 h (P = 0.023), 18 h (P = 0.023) and 24 h (P = 0.016) postoperatively, decreased intrathecal bupivacaine requirement [(induction (P = 0.012) and maintenance (P = 0.031)], postoperative rescue fentanyl requirement (P = 0.018) and patient satisfaction (P = 0.032) at the cost of increased postoperative nausea and vomiting (P = 0.049). The 'opioid-based' TCSA provided better postoperative analgesia with significantly lesser postoperative pain scores when compared to the 'opioid-free' group in patients undergoing major abdominal surgery.

Effect of i.v. Magnesium Sulphate versus i.v. Dexamethasone on Intraoperative Haemodynamic and Postoperative Analgesia after Spinal Anaesthesia in Lower Limb Surgeries: A Randomised Clinical Study

Introduction: Intrathecal adjuvants have gained favour in recent years with the goal of extending the duration of a block. Among these, Dexamethasone possesses anti-inflammatory and analgesic action and can be given as an adjuvant to local anaesthetics to enhance the efficacy of regional anaesthesia, as well as to decrease the intensity of shivering. The addition of Magnesium sulphate (MgSO4 ) to spinal anaesthesia helps in improving postoperative analgesia in an orthopaedic setting. Aim: To compare the effects of Intravenously (i.v.) MgSO4 and i.v. dexamethasone on intraoperative haemodynamics, the time to achieve dermatome T10 intraoperatively, and to compare postoperative Visual Analogue Scale (VAS) scores between the two groups at 1, 3, 6, 12, and 24 hours after surgery. Materials and Methods: This randomised clinical trial was conducted, and patients were randomly divided into two groups. Group M (n=40): MgSO4 40 mg/kg given 15 minutes before spinal anaesthesia in 100 mL normal saline infusion i.v. Group D (n=40): Dexamethasone 8 mg given 15 minutes before spinal anaesthesia in 100 mL normal saline infusion i.v. The parameters assessed included haemodynamic parameters, time to achieve dermatome T10 intraoperatively, postoperative VAS score at 1, 3, 6, 12, and 24 hours after surgery, and any side-effects like sedation, respiratory depression, nausea, vomiting, pruritus, urinary retention, bradycardia, and hypotension. Statistical testing was conducted using the statistical software Statistical Package for Social Sciences (SPSS) 28.0. Results: There was no significant difference in demographic variables (age and gender) between the two groups (p-value&gt;0.05). However, the decrease in mean heart rate, Systolic Blood Pressure (SBP), Diastolic Blood Pressure (DBP), and Mean Arterial Blood Pressure (MAP) was greater in group D compared to group M at different time intervals (p-value&lt;0.05). Additionally, dermatome level T10 was achieved earlier in group D by approximately two minutes compared to group M (6.95±0.39 minutes versus 5.03±0.16 minutes, respectively, p-value&lt;0.001). Conclusion: An i.v. infusion of 8 mg dexamethasone in 100 mL normal saline was more effective compared to an i.v. infusion of 40 mg/kg MgSO4 in terms of achieving more stable haemodynamics intraoperatively and achieving the T10 dermatome level earlier.

Comparison of Equivalent Doses of Intrathecal Hyperbaric Levo-bupivacaine and Hyperbaric Bupivacaine for Caesarean Section: A Prospective Randomised Double-Blind Study

Introduction: Subarachnoid Block (SAB) with Hyperbaric Bupivacaine (HB) is the most common anaesthetic technique for Lower Segment Caesarean Section (LSCS). Levo-bupivacaine, an enantiomer of racemic bupivacaine, has been developed to provide anaesthesia with the same effectiveness but with better haemodynamic stability. Aim: To compare the effectiveness of hyperbaric levobupivacaine to HB in achieving sensory and motor blocks in Caesarean Section(CS) using equivalent doses. Materials and Methods: Eighty parturients aged 18-38 years with no co-morbidities were randomly divided into two groups receiving equivalent doses of HB and hyperbaric levobupivacaine for SAB. The effectiveness of the two drugs was compared in terms of the time taken to achieve sensory and motor blocks, as well as the time for block regression for two segments for sensory block and the return of motor block assessed by the ability to flex the ankle joint. Adverse events such as a fall in Systolic Blood Pressure (SBP) and the dose of vasopressor were noted for the two groups. Results: The time taken to attain a T6 dermatomal block level was 2.43±1.00 and 2.80±1.51 (p-value 0.08) for the bupivacaine and levo-bupivacaine groups, respectively. Complete motor block of the lower limb was achieved in 4.85±1.67 and 5.15±1.82 (p-value 0.53). However, the time to 2-segment regression for sensory block was significantly faster in the levo-bupivacaine group than in the bupivacaine group (125.9±28.56 minutes and 109.13±28.84 minutes, respectively, p-value 0.009). Regression from motor block was also found to be highly statistically significant (158.38±34.92 minutes for bupivacaine and 138.75±25.71 minutes for the levobupivacaine group, p-value 0.006). Spinal-induced hypotension was comparable in both groups, but the bupivacaine group needed a much higher repetition of dose of vasopressor than the levo-bupivacaine group. Conclusion: Levo-bupivacaine is comparable to its racemic isomer bupivacaine in achieving anaesthesia when administered Intrathecally (IT) for CS. However, with equivalent doses, the duration of action is significantly shorter with hyperbaric levobupivacaine. Dose adjustment might be required with hyperbaric levo-bupivacaine based on the duration of the surgery. Haemodynamic stability is also similar with both drugs.

A Randomized Comparative Study to Evaluate the Efficacy of Dexmedetomidine used as an Adjuvant to Isobaric 1% 2-Chloroprocaine in Parturients Undergoing Elective Lower Segment Cesarean Section under Subarachnoid Block

Background and Aims: Preservative-free 1% 2-chloroprocaine (2-CP) is an amino-ester local anesthetic (LA), suitable for short duration daycare or ambulatory surgeries. Dexmedetomidine as an adjuvant may enhance the efficacy of LA. Our study aimed to evaluate the analgesic efficacy and safety of intrathecal dexmedetomidine as an adjuvant to 1% 2-CP in parturients undergoing elective lower segment cesarean section (LSCS). Material and Methods: After obtaining approval from the Institutional Ethics Committee and informed written consent, 100 term parturients aged 18–35 years, belonging to American Society of Anesthesiologists (ASA) physical status II, undergoing elective LSCS were randomly allocated into two groups. Group CD received 1% preservative-free 2-CP 3 ml (30 mg) +0.5 ml dexmedetomidine (5 µg) diluted in (normal saline) NS, while Group C (n = 50) received 1% preservative-free 2-CP 3 ml (30 mg) +0.5 ml NS. Among the various parameters noted, duration of sensory block was the primary outcome measure while the onset of sensory block, highest dermatomal level achieved, time to achieve highest dermatomal level, time to two-segment regression, onset and duration of motor block, duration of analgesia, Visual Analog Scale (VAS) score, Apgar score, hemodynamic changes, and side effects were secondary outcome measures. Results: Both groups were comparable with respect to demographic profile, onset of sensory block, onset and duration of motor block. The duration of sensory block (100.12 ± 15.41 versus 71.68 ± 4.68 min) (&lt;0.0001) as well as the duration of analgesia (113.08 ± 13.74 versus 81.60 ± 8.28 min) (&lt;0.0001) were significantly prolonged in Group CD compared to Group C. Apgar score of newborns, hemodynamic parameters, and adverse effects were comparable in two groups. Conclusion: Intrathecal dexmedetomidine (5 µg) as an adjuvant to preservative-free 1% 2-CP results in a prolonged duration of both sensory block and analgesia for LSCS without affecting motor block characteristics.

Spinal Anaesthesia Success: An Observational Study Assessing Subjective Sensations During Spinal Anaesthetic Drug Injection

Introduction: Spinal Anaesthesia (SA) has stood as the most favoured and dependable technique in regional anaesthesia for the past century. However, despite its widespread use, there are instances of occasional SA failure. Currently, there is no straightforward, cost-effective, and easily administered real-time test-aside from the positive aspiration of Cerebrospinal Fluid (CSF)-that can reliably confirm the deposition of local anaesthetic in the subarachnoid space. Aim: To evaluate the predictive value of subjective sensations (warmth/tingling/numbness) during the administration of SA for enhancing success rates. Materials and Methods: A prospective observational study preceeded the recruitment of 500 patients for this investigation. Following the confirmation of CSF aspiration upon injecting the SA drug, Bupivacaine, patients were queried about the sensations of warmth and/or tingling numbness in the lower limb, saddle part, and inner thighs. This assessment was conducted at 30 seconds and one minute after injection. Additionally, patients were asked to report any increase in the area and/or intensity of these sensations. The adequacy of SA was determined by achieving a sensory block upto the desired dermatome level and reaching a Bromage scale score of IV. Evaluations were performed at two minutes, five minutes, 10 minutes, and 15 minutes from the initiation of SA. Results: The population, predominantly ASA Class-I (60%) and II (40%), exhibited a median age of 45 years, with 54% being male. Intraoperative vital signs, including Heart Rate (HR), Systolic Blood Pressures (SBP), and Diastolic Blood Pressures (DBP), showed a consistent declining trend post-SA administration. Efficacy assessments revealed that Bromage Grade-IV was achieved in 99% of patients at 15 minutes. Notably, subjective sensations of warmth, tingling, and/or numbness proved to be robust predictors of successful SA, with a 218-fold increased likelihood. The diagnostic model demonstrated a high sensitivity of 98%, specificity of 85%, and a Positive Predictive Value (PPV) exceeding 99%. Conclusion: This study highlights the crucial role of warmth, tingling, and numbness as reliable indicators for successful SA, supported by a robust 97% success rate. Incorporating these patient-reported sensations in assessments provides a practical and accessible approach to improve the efficacy of SA procedures.

A Comparative Study of Bupivacaine and Bupivacaine with Fentanyl for Subarachnoid Block

Introduction: Subarachnoid block (SAB) is the anesthesia of choice for lower abdominal and lower limb surgeries. The objective of the study was to evaluate and compare the onset, duration, recovery of neural blockade, hemodynamic changes and side effects of bupivacaine alone with fentanyl added to bupivacaine.Materials and methods: This cross sectional comparative study was conducted in Department of Anaesthesia at National Medical College in 82 patients from April 2023 to September 2023 . Patients of either sex as per American Society of Anaesesiologists, Physical Status I-II between age 20- 60 years were randomly allocated to one of two groups of 41 each.Results: This study showed that there was highly significant difference in the highest level of sensory block achieved between mthe two groups (p &lt; 0.001 ) and motor blockade. Most of patients receiving bupivacaine alone (Group B) had achieved T6 dermatomal sensory level block and Bromage score of 4, while patients receiving fentanyl with bupivacaine (Group F) achieved T8 and also Bromage score of 3 respectively. The mean duration for highest sensory level in group F and group B was 7.76 and 9.66 minutes, respectively. The mean duration for 2 segment regression in group F and group B was 95.28 and 67.24 minutes respectively. Hypotension was significantly high in Group B.Conclusion: Fentanyl added to bupivacaine has an earlier onset of action, prolonged sensory analgesia but earlier motor recovery compared to bupivacaine alone but a comparatively lower sensory dermatomal level without complete motor blockade, adequate for surgical procedures.

Intrathecal 2-Chloroprocaine 3% Versus Hyperbaric Bupivacaine 0.75% for Cervical Cerclage: A Double-blind Randomized Controlled Trial

(Anesth Analg. 2022;134:634–632) Cervical cerclage, an operation designed to reduce preterm delivery and improve perinatal outcomes, is often performed under spinal anesthesia. While the benefits of spinal anesthesia are well documented, a short-acting local anesthetic agent, such as 2-chloroprocaine, could shorten postanesthesia care unit (PACU) stay compared with longer acting agents. Currently, bupivacaine is the most used local anesthesia for cerclage because of historical concern regarding 2-chloroprocaine’s safety. This study randomly compared the outcome of 2-chloroprocaine 3% 50 mg and hyperbaric bupivacaine 0.75% 9 mg on dermatomal level, sensory block resolution, ability to ambulate and void, and motor blockade.

A TRIAL TO INVESTIGATE THE CORRELATION BETWEEN THE SPINAL COLUMN LENGTH AND ABDOMINAL GIRTH, AND THE LEVEL OF SENSORY BLOCKADE IN SUBARACHNOID BLOCK IN PARTURIENTS REQUIRING SPINAL ANAESTHESIA FOR LOWER SEGMENT CAESAREAN SECTION.

Introduction Spinal anaesthesia (SA) is a type of regional anaesthesia which obstructs nerve roots coursing through the subarachnoid space. It is a reliable technique that has become a preferred technique in lower segment caesarean section. Sensory blocking up to T4 dermatome level is required during Caesarean section, as this not only suppresses somatic sensations but also removes visceral discomfort caused by peritoneum manipulation. However, because of this, the nal extent of anesthesia remains unpredictable which may cause inadequate local anaesthesia or excessive block which may increase hemodynamic instability and be hazardous to the patients. Hence, predicting and controlling the spread of local anaesthesia in the cerebrospinal uid is crucial which can be achieved by studying the factors that inuence the extent of spinal anaesthesia. Such factors include the patient's general features, the characteristics of the injected solution, the clinical technique used and so on. The current study was undertaken to investigate the correlation between patient's general features such as the spinal column length and abdominal girth, and the level of sensory blockade in subarachnoid block for a given amount of local anaesthetic. The current prospective study cohort includes 100 parturients who rece Methods ived 2mL of 0.5% hyperbaric bupivacaine for subarachnoid block. Height, weight, spinal column length, and abdominal girth were measured and recorded. Sensory level of blockade achieved was noted at 3 minutes and 25 minutes. The data was recorded in Microsoft excel and the analysis was done using SPSS version 20. Results Analysis indicated a negative association between abdominal girth and thoracic dermatome levels at 3 minutes (r-value=-0.042) and this association was found statistically insignicant (p-value=0.410&gt;0.05). Similarly, at 25 minutes, there was a negative association between abdominal girth and thoracic dermatome levels (r-value=-0.201), however, this association was statistically signicant (p-value=0.017&lt;0.05). The spinal column length and thoracic dermatome levels showed negative association that was statistically insignicant at both the 3 (r-value=- 0.409, p-value = 0.673&gt;0.05) and 25-minute (r-value=-0.148, p-value=0.530&gt;0.05) time points. From o Conclusion ur study we concluded that spinal column length was not a contributing factor to the level of blockade either at the onset of blockade or the nal spread. However, abdominal girth did have an inuence on the level of blockade. In order to conrm these results and reach a more satisfactory conclusion, studies in larger population need to be conducted.

Ultrasound-guided Techniques for Perioperative Analgesia in Pediatric Lower Abdominal Surgeries: Quadratus Lumborum Block with Bupivacaine versus Caudal Bupivacaine and Neostigmine

BACKGROUND: Ultrasound-guided regional anesthesia techniques for perioperative analgesia in pediatric patients scheduled for lower abdominal surgeries can be achieved either by quadratus lumborum block (QLB) or caudal block (CB). Neostigmine was co-administered with caudal bupivacaine to shorten the onset and extend the duration of analgesia. OBJECTIVES: This study aimed to compare between 2 ultrasound-guided techniques used for perioperative analgesia (QLB with bupivacaine vs. CB with bupivacaine/neostigmine) regarding the total amount of rescue analgesic (acetaminophen mg/kg) used for pain relief at 24 hours postsurgery in pediatric patients undergoing lower abdominal surgeries in a developing country and to discuss existing barriers during the implementation of both techniques. STUDY DESIGN: A randomized, double-blind, prospective, single-center study. SETTING: Ain-Shams University Hospitals METHODS: Eighty pediatric patients scheduled for lower abdominal surgeries under general anesthesia were randomly allocated to receive either ultrasound-guided QLB using bupivacaine or ultrasound-guided CB using a bupivacaine/neostigmine mixture. The total amount of rescue analgesic (acetaminophen mg/kg) 24 hours postsurgery was considered as the primary outcome while the time to first rescue analgesia, pain score, postoperative nausea and vomiting, bradycardia, hypotension, and urinary retention were considered as secondary outcomes. RESULTS: In the QLB group, the time to first rescue analgesia was longer whereas the total analgesic dose (mg/kg) was lower than the CB group (P &lt; 0.001, P = 0.007, respectively). While, on the other hand, in CB group, the time to perform the block was shorter and Parents Satisfaction Score 24 h postsurgery was lower than the QLB group (P &lt; 0.001, P &lt; 0.001, respectively). Side effects were infrequent and comparable between the study groups. LIMITATIONS: First, the researchers did not assess the dermatomal level before or after the operation in either group. Second, the investigators should have noticed the first voiding time to demonstrate accurately the incidence of urine retention. Third, a cost-effectiveness analysis of perioperative costs (drugs, staff, resources being used) of these regional anesthesia techniques when applied in an ambulatory setting should have been done, which would be helpful for those in resource-limited settings. CONCLUSIONS: Postoperative analgesia for pediatric patients undergoing lower abdominal surgeries can be safely and effectively achieved by QLB with bupivacaine and a CB with a bupivacaine/neostigmine mixture with priority given to CB, especially in resource-limited settings. KEY WORDS: Quadratus lumborum, caudal, bupivacaine, neostigmine, ultrasound, pediatric, postoperative, pain

Successful Treatment of Refractory Neuropathic Pain Following Axillary Dissection and Lipoma Resection Using Cervical and Thoracic Dorsal Root Ganglion Stimulation

BACKGROUND: Neuropathy is a pain condition that is caused by an insult to the somatosensory system. Providing adequate management of neuropathic pain (NP) conditions can be challenging as the dis-ease may become progressively nonresponsive to conventional therapies. If conventional treatment options prove ineffective, cervical dorsal root ganglion (DRG) stimulation is a relatively effective, off-label-use therapy for NP, which requires expert cervical placement to be completed safely and effectively. The Neuromodulation Appropriateness Consensus Committee guidelines highlight safety features and general indications for DRG stimulation, which includes current on-label usage up to T10. Although this committee’s expert opinions stated that DRG is safe up to the C5 level, there is limited published efficacy and safety data at levels higher than T10. CASE REPORT: A 36-year-old woman with a significant medical history of anxiety developed intractable right upper extremity NP following an axillary dissection for a lipoma excision. De-spite conservative management, she presented with debilitating NP and severe right upper ex-tremity functional restrictions following the procedure. The patient underwent a C8-T1 DRG stimulation trial, which decreased her pain levels over 50%, and significantly increased her functional abilities. Right-sided C8-T1 permanent DRG leads were placed, which resulted in improved sleep, increased ability to use her right upper extremity, a 95% to 97% reduction in pain, and elimination of regularly scheduled analgesic medications. CONCLUSIONS: Cervical and high thoracic DRG was safe and successful in the treatment of right upper extremity NP in the upper dermatomal levels secondary to axillary dissection and lipoma resection. KEY WORDS: Cervical and high thoracic DRG, neuropathic pain, axillary dissection, lipoma re-section, neuromodulation, case report

Block Quality Of Dexmedetomidine-Based Spinal Anaesthesia In Orthopaedic Surgeries: A Meta-Analysis Of Clinical Trials

Background: Dexmedetomidine is used as an adjuvant to local anesthetic agents in spinal anesthesia and is believed to increase quality of sensory and motor blocks. Our aim was to assess the effects of dexmedetomidine as an adjunct on block quality of spinal anesthesia in orthopedic procedures.&#x0D; Methodology: A systematic review of randomized control trials was conducted to assess the effect of intrathecal dexmedetomidine added to local anesthetic agents on the block quality of spinal anesthesia in orthopedic surgeries. PubMed, Google scholar, and Medline databases were searched for randomized controlled clinical trials. Studies met our inclusion criteria, if they used intrathecal 5 µg dexmedetomidine as an additive to 2.5−3 ml (12.5−15 mg) bupivacaine or ropivacaine, and these were included in our meta-analysis.&#x0D; Results: Eight trials comprising 510 patients matched our inclusion criteria. Time to one sensory segment block regression (mean difference 139.72 min; 95% confidence interval (CI) 35.18−244.26; P = 0.009), two sensory segments block regression (mean difference 54.8 min; 95% CI [31.36−78.24]; P &lt; 0.001), and Bromage score of zero (mean difference 93.66 min; 95%CI [30.20−157.12]; P = 0.004 ) were significantly prolonged in dexmedetomidine group. There were no significant differences between dexmedetomidine group and control group in duration of surgery (P = 0.33) or time till block reaches T10 dermatomal level (P = 0.30). Finally, time to reach Bromage score of III following injection was significantly shorter in dexmedetomidine group (mean difference 2.62 min; 95%CI [−5.12−−0.13]; P = 0.04).&#x0D; Conclusion: Dexmedetomidine was found to achieve extended motor and sensory block when needed, bearing in mind higher cost and potential side effects.&#x0D; Key words: Dexmedetomidine, Spinal Anesthesia, Orthopedic surgery, Meta-analysis.&#x0D; Citation: Alhajahjeh AA, Suleiman A, Almustafa HM, Mesmar TM, Hamdan A, Almustafa MM. Neuraxial block quality of dexmedetomidine-containing regimens in orthopedic surgeries: a meta-analysis. Anaesth. pain intensive care 2022;27(1):43−52.&#x0D; DOI: 10.35975/apic.v27i1.1876&#x0D; Received: May 22, 2022; Reviewed: August 14, 2022; Accepted: December 28, 2022

Analysis of intrathecal clonidine as an adjuvant in the subarachnoid block on post-operative analgesia and safety profile in obstetric surgeries: A randomised controlled trial

Background: Clonidine has long been considered an 'off-label' medication for use in obstetrics. Different doses of clonidine are studied and it is found that higher doses are associated with sedation and haemodynamic instability. Hence, we analysed a mini dose of intrathecal clonidine of 30 μg for its impact primarily on post-operative analgesia and secondarily on the quality of spinal anaesthesia, haemodynamics, sedation and neonatal outcomes in caesarean sections.Methods: One hundred participants were randomised them to receive the interventions. Group B received 11 mg of 0.5% hyperbaric bupivacaine (2.2 mL) and Group C received 10 mg of 0.5% hyperbaric bupivacaine with 30 μg of clonidine (2.2 mL). Motor, sensory and haemodynamic characteristics with time to rescue analgesics were observed in both the groups and analysed using univariate analysis.Results: Time to rescue analgesics (P < 0.001), visual analogue scores in the post-operative period and time to grade 0 Bromage (P = 0.002) were statistically significant in Group C. Time to T6 dermatomal level and time to grade 4 Bromage were similar in both the groups. Apgar scores were comparable and no adverse events were noted in both the groups.Conclusions: A low dose of intrathecal clonidine (30 μg) can prolong the duration of post-operative analgesia in caesarean section with comfortable maternal sedation and good neonatal outcome without significant complications.(Clinical Trials Registry- India, number CTRI/2018/08/015250)

Effects of intrathecal dexmedetomidine coadministered with hyperbaric bupivacaine in the lower abdominal surgery: Results of a double-blind, randomized, and controlled trial between two different doses

Background: Although various adjuvants have been added to local anesthetic agents to potentiate its effect, dexmedetomidine is a relatively new drug with only a fewer studies. Aims and Objectives: The present study has been conducted to compare the efficacy of intrathecal hyperbaric bupivacaine alone with dexmedetomidine of two different doses as adjuvants in spinal anesthesia for the lower abdominal surgery. Materials and Methods: This was a double-blinded, randomized, and controlled trial. Total 120 patients of American Society of Anesthesiologists physical status I and II, 70 male and 50 female, aged between 20 and 60 years, were randomized into three groups receiving 15 mg 0.5% hyperbaric bupivacaine with normal saline, 4 μg (microgram) dexmedetomidine, and 2 μg dexmedetomidine, respectively, administered intrathecally. Results: There was significant difference among all three groups with regard to the onset of sensory block and time to reach the highest level of sensory block. Time to reach T10 dermatome, time to reach Bromage 3 motor block, the mean regression time to S1 dermatome level, the mean regression time to reach Bromage 0, and time to first requirement of rescue analgesia – all these variables showed significance when 4 μg dexmedetomidine additive group was compared with 2 μg dexmedetomidine additive group and bupivacaine alone group. Conclusion: In our double-blinded, randomized, and controlled trial, 4 μg intrathecal dexmedetomidine coadministered with 0.5% hyperbaric bupivacaine showed superior efficacy. Further, larger trials are needed to confirm our findings.

Battling Hypotension in Cesarean Section

Perhaps the greatest day in a mother's life is the birth of her child. As a father of two, I will never forget those two drastically different, yet equally beautiful moments. In each circumstance, the obstetricians, nurses, anesthesia providers, and technicians all worked seamlessly to provide a safe and enjoyable childbirth experience for our new and growing family. One key element of the childbirth experience is maternal pain control. Depending on several factors, the parturient may receive an epidural, a spinal, a combined spinal/epidural, IV analgesics or perhaps nothing at all. One key commonality after any anesthetic administration is its propensity to cause hypotension, which is usually most profound after spinal anesthesia (SA). SA is the preferred method during elective cesarean sections due to the rapid and predictable onset and duration of action of local anesthetics injected directly into the cerebrospinal fluid. Immediately after SA is administered, the patient is helped to lay supine which assists the hyperbaric local anesthetic to move with gravity and rise cephalad from the lower lumber injection site (L3-L5) towards the desired T4 vertebra. While marching up those 12 dermatome levels, the local anesthetic quickly begins to attenuate sympathetic tone at every level along the way. Depending on the health of the patient's cardiovascular system, intravascular volume status and other factors, the sympathectomy and subsequent vasodilation can result in significant and symptomatic hypotension, causing a vast array of symptoms such as maternal nausea, vomiting, dizziness, and cardiovascular collapse as well as fetal acidosis and decreased Apgar scores. Preanesthesia fluid boluses are commonly administered in hopes to increase intravascular volume and lessen the severity of hypotension, but its effectiveness is unreliable. Acute arterial vasodilation is the primary cause of hypotension after SA. Intravenous vasoactive medications such as phenylephrine and ephedrine offer the fastest and most effective means of arterial vasoconstriction and subsequent correction of blood pressure; yet healthcare providers will always continue to search for alternative and less invasive methods of preventing and/or treating hypotension after SA.

Non-traumatic Spontaneous Spinal Subdural Hematoma in a Patient with Acute Paraplegia

Acute non-traumatic spinal subdural hematoma (SSDH) is a rare clinical condition in the emergency medicine practice and difficult to diagnose during the primary physical examination. It mostly occurs at thoracal vertebra levels due to trauma, use of anticoagulants, medical procedures such as acupuncture, arteriovenous malformations, hematological disorders or space-occupying lesions. Here, we discussed an elderly female patient who was not on anticoagulant and described sudden loss of muscle strength and sensation in both lower extremities. Initial laboratory and imaging including brain computerized tomography (CT) and magnetic resonance imaging (MRI) were in normal range. Her secondary examination revealed anesthesia under the T4 dermatome level. Cervical spine-MRI imaging revealed a subdural hematoma significantly compressing the spinal cord on the C7-T1 dermatome segments. Any emergency neurosurgical intervention was not considered and the patient was interned in the neurosurgical clinic for conservative treatment and further examination. Patient , with no progress seen in consecutive MRI scans, was discharged after offering an outpatient check-up. We recommend secondary physical examination in emergency department (ED). In the case of appearance of sensory deficits of certain dermatomes, spine-MR imaging may lead to put the diagnose early in ED.