Successful Block Research Articles

On the Application of Successive Over-relaxation Algorithmic and Block Numerical Iterative Solutions for the Stationary Distribution in Markov Chain

The evolution of a system is represented by transitions from one state to the next, and the system's physical or mathematical behavior can also be depicted by defining all of the numerous states it can be in and demonstrating how it moves between them. In this study, the iterative solution methods for the stationary distribution of Markov chains were investigated, which start with an initial estimate of the solution vector and then alter it in such a way that it gets closer and closer to the genuine solution with each step or iteration., and also involved matrices operations such as multiplication with one or more vectors, which leaves the transition matrices unchanged and saves time. Our goal is to use Successive Overrelaxation Algorithmic and Block Numerical Iterative Solution Methods to compute the solutions. With the help of some existing Markov chain laws, theorems, and formulas, the normalization principle and matric operations such as lower, upper, and diagonal matrices are used. The stationary distribution vector’s π^((k+1) )={■(π_1^((k+1) )&π_2^((k+1) )&■(π_3^((k+1) )&π_4^((k+1) )&π_5^((k+1) ) )),k=0,1,2,…,n} are obtained for the illustrative examples, taken the initial stationary solution to be π^((0) )=(■(0.2&0.2&■(0.2&0.2&0.2)))^T and it was observed that all subsequent iterations yield exactly the same result as π^((1) ), and this shows that, the block iterative method requires only a single iteration to obtain the solution to full machine precision.

Secure NOMA-Based UAV-MEC Network Towards a Flying Eavesdropper

Non-orthogonal multiple access (NOMA) allows multiple users to share link resource for higher spectrum efficiency. It can be applied to unmanned aerial vehicle (UAV) and mobile edge computing (MEC) networks to provide convenient offloading computing service for ground users (GUs) with large-scale access. However, due to the line-of-sight (LoS) of UAV transmission, the information can be easily eavesdropped in NOMA-based UAV-MEC networks. In this paper, we propose a secure communication scheme for the NOMA-based UAV-MEC system towards a flying eavesdropper. In the proposed scheme, the average security computation capacity of the system is maximized while guaranteeing a minimum security computation requirement for each GU. Due to the uncertainty of the eavesdropper’s position, the coupling of multi-variables and the non-convexity of the problem, we first study the worst security situation through mathematical derivation. Then, the problem is solved by utilizing successive convex approximation (SCA) and block coordinate descent (BCD) methods with respect to channel coefficient, transmit power, central processing unit (CPU) computation frequency, local computation and UAV trajectory. Simulation results show that the proposed scheme is superior to the benchmarks in terms of the system security computation performance.

Randomized controlled trial of suprascapular nerve blocks for subacute adhesive capsulitis.

Shoulder pain and loss of function remain a therapeutic challenge in adhesive capsulitis. Suprascapular nerve blocks, a common treatment in adhesive capsulitis, are considered a safe and effective method for the resolution of pain and restoration of shoulder range of motion (ROM). To our knowledge, no data are available on the use of suprascapular nerve blocks in adhesive capsulitis in the subacute phase. The aim of this study was to compare the efficacy of ultrasound-guided suprascapular nerve blocks versus saline injections for treating adhesive capsulitis in the subacute phase. Randomized double-blinded controlled trial; level of evidence 2. Out-patient consultation of Physical and Rehabilitation Medicine in a general hospital. Thirty-five patients with subacute adhesive capsulitis. Patients were randomly allocated to receive either 3 successive (1-week interval) ultrasound-guided suprascapular nerve blocks with ropivacaine 5 mL 2 mg/mL (intervention group) or ultrasound-guided injections of 5 mL sterile saline solution (NaCl 0.9%) (control group), at the floor of the suprascapular fossa. Primary outcome was shoulder function assessed by the Constant-Murley Score. Secondary outcomes were shoulder ROM and shoulder pain intensity. Assessments were performed before each injection and 4 weeks after the last injection. A significant increase of Constant-Murley Score (P<0.001), increase of shoulder ROM (all directions: P<0.011) and decrease of pain (P<0.001), were observed over time in both study groups. However, no significant differences were observed between the intervention and the control group. Three successive suprascapular nerve blocks did not provide a better outcome than saline injections on shoulder function, ROM, and pain in subacute adhesive capsulitis. These negative findings warrant some considerations on the natural history of adhesive capsulitis, as well as timing, type, and placebo effects of injections. The current place of suprascapular nerve blocks in the treatment strategy of adhesive capsulitis needs to be rediscussed.

Evaluation of contrast-enhanced ultrasonography with Sonazoid® in visualization of local anesthetic distribution in rectus sheath block: a prospective, clinical study.

Clear visualization of ultrasound (US) images is crucial for successful US-guided nerve block. However, accurate determination of local anesthetic (LA) distribution from US images remains difficult. Sonazoid®, which comprises perflubutane microbubbles, is used to diagnose hepatic and breast tumors. This study aimed to investigate the visibility of Sonazoid® in perioperative US-guided nerve block. We performed rectus sheath block (RSB) in patients scheduled for laparoscopic abdominal surgery (n = 10). 10mL of a mixture containing equal amounts of 0.75% ropivacaine and iohexol with the addition of Sonazoid® diluted 100-fold was administered. We investigated the correlation and agreement between Sonazoid® and iohexol distributions. The brightness of the solution and tissues was calculated: a grayscale value between 0 (dark) and 255 (bright) was measured in all pixels of the region of interest. Adverse events were also investigated. Sonazoid® was clearly visualized and distinguished from the surrounding tissues both during and after RSB. The spread of Sonazoid® and iohexol was significantly correlated (spearman's ρ = 0.53, p = 0.0004). Bland-Altman analyses revealed significant mean difference between two methods (15.6mm; 95% confidence interval [CI]: 10.6, 20.6; standard deviation (SD) 15.65; p < 0.0001). Limits of agreement were -14.94 to 46.24mm. Sonazoid® significantly increased the mean grayscale values at the posterior rectus sheath (93.7 vs. 201.9, p < 0.0001). There were no complications. Sonazoid diluted 100-fold® was clearly visualized real-time, and the enhancement was sustained and measurable after RSB. Sonazoid® could potentially be used for the contrast agent of US-guided nerve block.

Ultrasound guided technique versus landmark technique for caudal epidural block in children: A randomized controlled study

The aim of this study was to compare the two modalities of performing caudal block – ultrasonography guidance and conventional landmark technique in terms of time taken to perform the block, number of attempts to perform the block, block success at first puncture, haemodynamic changes and complications.: The study was conducted in Department of Anaesthesiology, NKP Salve Institute of Medical Sciences and Research Centre and Lata Mangeshkar Hospital, Nagpur. It was a prospective randomized single blinded study.: This study was conducted in 62 grade ASA I and II patients of both sexes between age group of 2 - 8 years posted for elective surgeries below the level of umbilicus. Patients were randomized into 2 groups: Group C (Conventional technique) (n = 31) and group U (Ultrasound technique) (n=31) Caudal solution was prepared as Inj 0.2% Ropivacaine with Inj Fentanyl 2 mcg/kg with dosage according to Armitage formula, and was administered to both groups. The block performing time, the block success rate, the number of needle puncture, the success at first puncture and the complications were recorded. The analysis was 2 tailed and significance level was set at 0.05.: The mean block performance in group C was 39.3 ± 10.9 seconds while that of the Group U was 52.2 ± 11.4 seconds (P = 0.001). The time taken for identification of the caudal epidural space in Group C was 15.74 + 8.05 seconds while that of the Group U was 24.26 + 8.89 seconds (p = 0.0002). There was no significant difference noted in the number of attempts taken for the block in between both the groups. C group had a success rate of 61.29% in the first attempt while U group has a success rate of 90.32%. (p = 0.008). C group had a success rate of 83.87% while U group has a success rate of 100%. (p = 0.008). The only complication seen in the study was subcutaneous bulging which was seen significantly more in patients of C group compared to U group. Subcutaneous bulging was seen in 8 patients of C group and in 2 patients of U group. Despite the limitations in central neuraxial anesthesia we recommend the use of ultrasound since it reduces the complications and increases the success rate of first puncture in pediatric caudal injection.

Comparative study of ultrasound assisted versus conventional surface landmark guided technique for combined spinal epidural anaesthesia in patients with increasaed body mass index and difficult surface anatomy of lower back and spinal deformity

Palpatory method is traditionally used in clinical practice to locate the puncture site of combined spinal epidural (CSE) block, but locating the puncture site accurately in obesity and patients with difficult landmark or spinal deformity is usually difficult. For a successful CSE block, the puncture site must be accurately identified. The goal of this study was to see how ultrasonography (USG) affected the success rate of CSE puncture in these patients.This prospective randomized study included 100 patients requiring CSE (needle through needle technique) of American Society of Anaesthesiologists (ASA) grade I/II, age 18-60years, obese (BMI upto 35 kg/m2), patients with difficult landmark, spinal deformity and were randomly assigned to one of two groups: Ultrasound assisted group (USG) (n=50) or Surface landmark group (SLG) (n=50). The primary outcome was to compare the first-pass needle success rate for establishing CSE, with secondary outcomes including the number of needle puncture attempts, time to establish landmarks (t1), time to complete CSE (t2), total procedure time (t), block associated pain and complications.The USG group had a significantly greater first pass needle success rate (92%) than the SLG group (60%) p&amp;#60;0.001. The number of attempts to accomplish CSE in the USG group was lower than in the SLG group (p = 0.001). The USG group had a longer t1 (1.50±0.42) minutes than the SLG group (0.80±0.28), p&amp;#60;.0001. The USG group had a shorter t2 (1.60±0.45) than the SLG group (3.37±1.25) minutes (p &amp;#60;0.001). Block associated pain score was less in USG group as compared to SLG group (p=0.0003).Preprocedural USG improves first pass needle success rate and reduces the number of needle puncture attempts, decrease the procedural time thus lowering the risk of trauma, block associated pain, and discomfort to the patient.

Evaluation of Block Success in Patients Undergoing Ultrasound-Guided Infraclavicular Brachial Plexus Block with Bilateral Upper Extremity Perfusion Index

Evaluation of Block Success in Patients Undergoing Ultrasound-Guided Infraclavicular Brachial Plexus Block with Bilateral Upper Extremity Perfusion Index

Regional haemodynamic variables and perfusion index in the evaluation of sciatic nerve block: a prospective observational trial

ObjectiveWe determined whether regional haemodynamics and perfusion index (PI) could be reliable indicators of a successful sciatic nerve block (SNB).DesignProspective observational trial.SettingA tertiary teaching hospital in China from April 2020...

Resource and Trajectory Optimization for Secure Communications in Dual Unmanned Aerial Vehicle Mobile Edge Computing Systems

With the maneuverability and mobility control of unmanned aerial vehicle (UAV), carrying mobile edge computing (MEC) servers on UAVs is able to effectively alleviate the explosive growth of data traffic pressure. However, UAV adopts line-of-sight transmission which has broadcasting characteristics. Malicious eavesdroppers can easily take advantage of the characteristics to eavesdrop information during the UAV edge computing. Therefore, the security of the UAV-MEC systems is a challenging problem. This article proposes a secure communication scheme for the dual-UAV-MEC system. In the proposed scheme, UAV server assists ground users in calculating the offloading tasks. In order to reduce the eavesdropping of offloading information by UAV eavesdropper, jammer sends interference signals on the ground. We aim to maximize the user's minimum secure calculation capacity by optimizing resources and trajectory of the UAV server. We first transform the optimization problem into a tractable form through mathematical methods and use successive convex approximation and block coordinate descent algorithms to solve it in an iterative manner. The final numerical results show that, compared with the benchmark schemes, the method proposed in this article effectively increases the secure calculation capacity of the system.

Testicular Pain – Not Always What it Seems: A Cross-sectional Assessment of Patients Presenting for Chronic Scrotal Content Pain at a Tertiary Care Center

ABSTRACT Introduction Introduction:: Chronic scrotal content pain (CSCP) is generally defined by persistent and bothersome pain present for &amp;gt; 3-months. This symptom complex leads to frustration for patients and providers alike, as the underlying etiology varies and in many instances is unknown. Scrotal pain may arise from outside the scrotal contents, as is seen with musculoskeletal conditions involving the hips, lower back, and pelvic musculature. Identifying those patients who have signs or symptoms of a musculoskeletal etiology earlier in their clinical course will allow for a more streamlined treatment pathway and minimize the need for unnecessary referrals. Objective To review historical and examination findings in patients presenting to a tertiary care center for evaluation of chronic testicular pain. Methods We reviewed our clinical experience with referrals for surgical intervention for “chronic testicular pain” at a tertiary care medical center between July 2019 and October 2020. Prior to scheduling an appointment, patients are queried via a list of questions to gather additional information in order to determine whether specialist consultation is indicated. Pertinent information was collected including historical patient data, physical examination findings, laboratory and imaging results, and treatment as recommended by the assessing physician. In addition, we gathered data on the number of prior consults and interventions performed by outside clinicians. The data was summarized to present a cross-sectional representation of patients presenting for CSCP. Results In total, 126 patients were seen for a primary chief complaint of CSCP. Mean patient age was 45 years [standard deviation (SD) 15]. 31 (24%), 55 (44%), and 40 (32%) were self-referred or referred by their primary care provider or a urologist, respectively. 88 patients (70%) had seen at least one prior urologist. 22/126 (17%) reported bilateral testicular pain. 29 patients (24%) had undergone a prior unsuccessful surgical intervention for their pain. On examination, reproducible testicular tenderness was present in only 57 patients (45%), despite 109 patients (87%) stating testicular pain as their primary chief complaint. Digital rectal examination of the pelvic floor musculature was positive for tenderness in 31/126 patients (25%), suggesting a possible pelvic floor contribution. After thorough assessment, musculoskeletal etiologies were suspected to underlie CSCP in 49 patients (39%), prompting additional evaluation and/or referrals. This included 35 patients (28%) who were specifically referred to a pelvic floor physical therapy specialist. Surgery was recommended in 68/126 patients (54%), including microdenervation of the spermatic cord in 22% (after successful diagnostic spermatic cord block), and epididymectomy in 13%. Conclusions CSCP presents with a wide array of concurrent symptoms. The history and physical examination must include assessments for concurrent abdominal, back, hip, and other genital/pelvic pain that may lend towards an alternative non-urologic treatment pathway. Disclosure No

Resource Allocation and 3D Deployment of UAVs-Assisted MEC Network with Air-Ground Cooperation.

Equipping an unmanned aerial vehicle (UAV) with a mobile edge computing (MEC) server is an interesting technique for assisting terminal devices (TDs) to complete their delay sensitive computing tasks. In this paper, we investigate a UAV-assisted MEC network with air–ground cooperation, where both UAV and ground access point (GAP) have a direct link with TDs and undertake computing tasks cooperatively. We set out to minimize the maximum delay among TDs by optimizing the resource allocation of the system and by three-dimensional (3D) deployment of UAVs. Specifically, we propose an iterative algorithm by jointly optimizing UAV–TD association, UAV horizontal location, UAV vertical location, bandwidth allocation, and task split ratio. However, the overall optimization problem will be a mixed-integer nonlinear programming (MINLP) problem, which is hard to deal with. Thus, we adopt successive convex approximation (SCA) and block coordinate descent (BCD) methods to obtain a solution. The simulation results have shown that our proposed algorithm is efficient and has a great performance compared to other benchmark schemes.

Comparison of three obturator nerve block techniques for injectate spread into the obturator canal: a randomized controlled trial

PurposeThe obturator nerve branches into the obturator canal; therefore, local anesthetic spread into the obturator canal predicts the success of the obturator nerve block (ONB). We compared three ONB techniques for the spread of local anesthetic mixed with contrast medium into the obturator canal.MethodsWe performed the ONB using the classical pubic approach (PA), inguinal approach (IA), or ultrasound-guided methodologic approach (UMA) in 143 patients undergoing transurethral resection of bladder tumors. The obturator nerve course and branching patterns of the UMA group were examined using ultrasound imaging. After injecting a local anesthetic mixed with a contrast medium, we evaluated its spread into the obturator canal using fluoroscopic imaging. P < 0.05 indicated statistical significance.ResultsSuccess rate of obturator canal enhancement was the greatest in the UMA group (84%; P < 0.001); the PA (42.6%; 20/47 patients) and IA (47.8%; 22/46 patients) groups did not differ significantly (P = 1.000). Both branches of the obturator nerve passed above the superior margin of the external obturator muscle (EOM), and the obturator canal was enhanced in 13 of 50 (26%) patients in the UMA group. The posterior branch of the obturator nerve passed between the superior and main fasciculi of the EOM in 37 of 50 patients (74%) in the UMA group; the obturator canal was enhanced in 29 of these 37 patients (78%).ConclusionLocal anesthetic spread into the obturator canal using the UMA was superior to that using the PA and IA. Both branches of the obturator nerve could be blocked using the UMA.

Fluoroscopic-guided erector spinae plane block for spine surgery

Erector spinae plane block (ESPB) is an ultrasound-guided block that can be also done under fluoroscopic guidance, which is usually used to manage postoperative pain of the thoracic and abdominal regions. We describe a successful Fluoroscopic-guided lumbar erector spinae plane block for lower back spinal surgery.

Surgeon-performed pericapsular nerve group (PENG) block for total hip arthroplasty using the direct anterior approach: a cadaveric study

BackgroundDuring total hip arthroplasty (THA) using the direct anterior approach, orthopaedic surgeons can identify all anatomical landmarks required for pericapsular nerve group (PENG) blocks and carry out the latter under...

Monitoring rock movement and—controlling ore loss and dilution associated with blasting at Geita and North Mara Gold mines, Tanzania

ABSTRACT We present findings from a blast movement monitoring research conducted as a part of mine to mill campaign at the Geita Gold Mine—and additional data from blast monitoring practices at North Mara Gold Mine. These include measurement of the blast-induced rock movement and perimeter translation after blast derived from a blast shot at Nyankanga pit (Geita Gold Mine) and three other shots at the Nyabirama pit (North Mara Gold Mine). Using Blast Movement Technology, 34 movement-monitoring balls installed in 13 blast-monitoring boreholes made possible estimation of the average vertical and horizontal ore movements in the studied blast shots. Recorded ore movement estimates average horizontal and vertical movements of 3.69 and 1.56 m, respectively, at the Nyabirama pit and average horizontal and vertical movements of 4.5 and 2.48 m, respectively, at the Nyankanga pit. Based on the estimated material movements, zones of ore losses and dilution are established and new dig lines are proposed from successful ore block translation in all blast shots.

Abstract No.: ABS1180: A randomised comparative evaluation of ultrasound guided classical vs parasacral parallel shift (PSPS) technique of sciatic nerve block combined with femoral nerve block as a sole anaesthetic modality for orthopaedic lower limb surgeries

Background and Aims:Sciatic nerve can be blocked in the gluteal region via anterior, posterior and a newly developed lateral/parasacral approach. Primary objective of the study was to compare success of sciatic nerve block using classical versus parasacral parallel shift approach (PSPS).Methods:This study was conducted in a tertiary medical college hospital from October 2020 to October 2021 after approval of Institutional Ethics Committee and written informed patient consent. Total 160 patients (80 in each group) aged 18-80 years with American Society of Anesthesiologists physical status I-III ,undergoing traumatic lower limb orthopaedic surgery were assessed for eligibility based on the inclusion and exclusion criteria. Ultrasonography was used for the blocks.Results:Successful block was administered in 98.61%(n=71) subjects via PSPS approach, compared to 90.27%(n=57) via classical approach(table1). Time between ultrasound localisation of nerve to drug administration was significantly higher with classical as compared to PSPS approach. Successful first needle pass was seen in 90.27%(n=65) of PSPS group compared to 45.54%(n=27) of classical group. Time to motor blockade was found to be 17.33+/-3.6 minutes with PSPS approach, significantly lower than classical (22+/-3.53 minutes) approach.Conclusion:Parasacral sciatic nerve block via PSPS approach is superior to classical approach in terms of time to administration of block, success of block, requirements of sedation intraoperatively, time to motor blockade and time to sensory blockadeTable 1Block performance characteristicsClassical groupPSPS groupPSuccessful blockn=65 (90.27%)n=71 (98.61%)0.029Successful first needle passn=32 (44%)n=65 (90.27%)0.000Time from ultrasound localisation to drug administration (min)9.51±2.163.28±1.190.000Time to motor blockade (min)21.94±3.1917.32±2.490.000Time to sensory blockade (min)20.00±2.7716.21±3.080.000

Abstract No. : ABS3228: Perfusion index - a novel and objective parameter to predict successful lumbar sympathectomy: a case series.

Background and Aims:Lumbar sympathectomy interrupts the sympathetic system of the lower limb, thereby augmenting the flow in microcirculation. This block is assessed by resolution of symptoms, reduced nociception, decreased sweating, and rise of local temperature. Perfusion index(PI) can objectively predict a successful block. complex regional pain syndromeMethods:The trend of perfusion index from the ipsilateral great toe of ten patients undergoing diagnostic lumbar sympathectomy for CRPS (6 patients) and peripheral vascular disease (4 patients), was observed and recorded using Mindray Beneview T8 monitor. The PI at zero and thirty minutes was plotted and the percentage of change was calculated.Results:The trend and behaviour of perfusion index in all patients, irrespective of the chronicity and underlying pathology, was consistent. The rise in PI in the lower limb can be taken as an objective marker of a successful lumbar sympathectomy. Further controlled studies are needed to pin down an absolute percentage rise in PI to predict a successful blockade.Conclusion:PI is a novel and promising parameter which is readily available in operating rooms and can objectively demonstrate a successful lumbarsympathectomy.Perfusion index, lumbosacral plexus, sympathectomy, complex regional pain syndrome

Biomimetic design of inhibitors of immune checkpoint LILRB4.

Immune checkpoint inhibitors have become a hot spot in the treatment of acute myeloid leukemia (AML), the most common acute leukemia (blood cancer) in adults. In the present study, molecular insights into the molecular interactions between an immune checkpoint leukocyte immunoglobulin-like receptor b4 (LILRB4) and its mAb h128-3 was explored using molecular dynamics (MD) simulation for the biomimetic design of peptide inhibitor of LILRB4. Both hydrophobic interaction and electrostatic interaction were found favorable for the binding of the mAb h128-3 on LILRB4, and hydrophobic interaction was identified as the main driving force. The key amino acid residues for the binding of mAb h128-3 on LILRB4 were identified as Y93, D94, D106, Y34, S103, W107, Y61, N30, E27, Y33, Y59, W95, S92 through MM-PBSA (molecular mechanics-Poisson-Boltzmann surface area) method. Based on this, an inhibitor library with the sequence of SXDXYXSY (Where X is an arbitrary amino acid residue) were designed. Two peptide inhibitors, SADHYHSY and SVDWYHSY were obtained through screening using molecular docking and MD simulations, and then validated by successful blocking of LILRB4 through the covering of LILRB4 surface by these inhibitors. These results would be helpful for the research and development of therapies for AML.

Investigating the Effect of the 10° Reverse Trendelenburg Position on Spinal Block Characteristics and Hemodynamic Parameters in Lower Limb Surgeries.

Introduction: The primary goal of spinal anesthesia in lower limb surgeries is to achieve a successful sensory and motor block. Adequate level of spinal block for lower limb orthopedic surgery is T10. Due to multiple factors affecting the level of spinal anesthesia, it is not always easy to control the level of spinal anesthesia.We proposed that maintaining patients in a 10° reverse Trendelenburg position after spinal anesthesia can significantly control the height of the sensory block, resulting in stable hemodynamics.Materials and methods: This study is a single centric, prospective, single-blinded randomized clinical trial (CTRI/2018/08/015455) conducted in a tertiary care center in Sub-Himalayan region in India from July 2018 to June 2019. Total 60 patients fulfilling our inclusion and exclusion criteria were recruited in the study and were divided into two groups. In the supine group, patients were positioned in the supine position, and in the Trendelenburg group, patients were positioned in a 10° reverse Trendelenburg position after administering spinal anesthesia with 12.5 mg bupivacaine heavy. The two groups were compared in terms of sensory block, motor block, and analgesia duration. Heart rate, blood pressure, mean arterial pressure, and hypotension were also compared between the two groups.Results: Duration of sensory block, motor block, and analgesia were significantly higher in patients of the reverse Trendelenburg group (group T) compared to the supine group (group S). In group T, 26.6% had a sensory block level above T8, whereas in group S, 86.6% of patients had a sensory block level above T8. No hypotension was observed in the Trendelenburg group, which was present in 33% of patients in the supine group (group S).Conclusion: Ten-degree reverse Trendelenburg position immediately after giving spinal anesthesia significantly limits the level of sensory block and provides better hemodynamic stability, and can be more beneficial, especially in geriatric patients and other high-risk patients for lower limb surgeries.

Ultrasound‐ and nerve stimulation‐guided sciatic and saphenous nerve blocks in a pet rabbit (Oryctolagus cuniculus) undergoing calcaneal fracture repair

AbstractThe beneficial effects of performing regional anaesthesia techniques as part of a pre‐emptive analgesic strategy are to improve perioperative analgesia and reduce opioid and general anaesthetic drug requirements. In prey species, an early recovery of voluntary motor function, especially after a regional anaesthesia, is essential for the animal's health and welfare. To reduce motor paralysis, a low volume and concentration of local anaesthetic should be administered close to the targeted nerve. This is the first report of an ultrasound (14 MHz linear probe)‐ and nerve stimulation (0.2 mA; 0.3 second; 2 Hz)‐guided saphenous and sciatic nerve blocks using bupivacaine (0.125%; 0.2 mL/kg per nerve) in a rabbit. Drug consumption, physiological response to surgery and postoperative pain scoring were used to determine block success. The ultrasound‐ and nerve stimulation‐guided sciatic and saphenous nerve blocks could be recommended as part of multimodal pain management in rabbits undergoing appropriate pelvic limb orthopaedic surgeries.