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1.
Braz J Anesthesiol ; 72(1): 110-114, 2022.
Article in English | MEDLINE | ID: mdl-33915199

ABSTRACT

BACKGROUND: This study aimed to evaluate the impact of Infiltration between the Popliteal Artery and Capsule of the posterior Knee (IPACK) combined with an adductor canal block under the guidance of ultrasound on early motor function after Total Knee Arthroplasty (TKA). METHODS: A sample of 60 cases who were scheduled for elective unilateral TKA were divided into two groups using random number table method: a group with IPACK combined with an adductor canal block (I group, n = 30), and a group with femoral nerve block combined with superior popliteal sciatic nerve block (FS group, n = 30). Before anesthesia induction was completed, the patients in I group received an ultrasound-guided adductor canal block with 15 mL of 0.375% ropivacaine and an IPACK block with 25 mL of ropivacaine, and the patients in FS group received a femoral nerve block and a superior popliteal sciatic nerve block with 20 mL of 0.375% ropivacaine under ultrasound guidance. Post-operation, all the patients received patient-controlled intravenous analgesia combined with an oral celecoxib capsule to relieve pain and maintain a visual analogue scale score of ≤ 3. RESULTS: The quadriceps femoris muscle strength score was significantly higher in Ⅰ group than in FS group (p = 0.001), while the modified Bromage score were significantly lower and walking distance results were significantly higher in Ⅰ group than in FS group (both p = 0.000). CONCLUSION: Compared with femoral nerve block combined with superior popliteal sciatic nerve block, IPACK combined with adductor canal block had a mild impact on early motor functions after TKA.


Subject(s)
Arthroplasty, Replacement, Knee , Nerve Block , Analgesia, Patient-Controlled , Analgesics, Opioid , Anesthetics, Local , Arthroplasty, Replacement, Knee/methods , Femoral Nerve/diagnostic imaging , Humans , Nerve Block/methods , Pain, Postoperative/drug therapy , Pain, Postoperative/prevention & control , Prospective Studies , Ropivacaine
2.
Reg Anesth Pain Med ; 46(10): 874-878, 2021 10.
Article in English | MEDLINE | ID: mdl-34290085

ABSTRACT

BACKGROUND: This randomized trial compared ultrasound-guided pericapsular nerve group block and suprainguinal fascia iliaca block in patients undergoing primary total hip arthroplasty. We selected the postoperative incidence of quadriceps motor block (defined as paresis or paralysis of knee extension) at 6 hours as the primary outcome. We hypothesized that, compared with suprainguinal fascia iliaca block, pericapsular nerve group block would decrease its occurrence from 70% to 20%. METHODS: Forty patients undergoing primary total hip arthroplasty under spinal anesthesia were randomly allocated to receive a pericapsular nerve group block (n=20) using 20 mL of adrenalized levobupivacaine 0.50%, or a suprainguinal fascia iliaca block (n=20) using 40 mL of adrenalized levobupivacaine 0.25%. After the performance of the block, a blinded observer recorded pain scores at 3, 6, 12, 18, 24, 36, and 48 hours; cumulative breakthrough morphine consumption at 24 and 48 hours; opioid-related side effects; ability to perform physiotherapy at 24 and 48 hours; as well as length of stay. Furthermore, the blinded observer also carried out sensory assessment (of the anterior, lateral, and medial aspects of the mid-thigh) and motor assessment (knee extension and hip adduction) at 3, 6, and 24 hours. RESULTS: Compared with suprainguinal fascia iliaca block, pericapsular nerve group block resulted in a lower incidence of quadriceps motor block at 3 hours (45% vs 90%; p<0.001) and 6 hours (25% vs 85%; p<0.001). Furthermore, pericapsular nerve group block also provided better preservation of hip adduction at 3 hours (p=0.023) as well as decreased sensory block of the anterior, lateral, and medial thighs at all measurement intervals (all p≤0.014). No clinically significant intergroup differences were found in terms of postoperative pain scores, cumulative opioid consumption at 24 and 48 hours, ability to perform physiotherapy, opioid-related side effects, and length of hospital stay. CONCLUSION: For primary total hip arthroplasty, pericapsular nerve group block results in better preservation of motor function than suprainguinal fascia iliaca block. Additional investigation is required to elucidate the optimal local anesthetic volume for motor-sparing pericapsular nerve group block and to compare the latter with alternate motor-sparing strategies such as periarticular local anesthetic infiltration. TRIAL REGISTRATION NUMBER: NCT04402450.


Subject(s)
Arthroplasty, Replacement, Hip , Nerve Block , Arthroplasty, Replacement, Hip/adverse effects , Fascia/diagnostic imaging , Femoral Nerve/diagnostic imaging , Humans , Nerve Block/adverse effects , Pain, Postoperative/diagnosis , Pain, Postoperative/etiology , Pain, Postoperative/prevention & control
4.
Rev. chil. anest ; 49(1): 141-145, 2020. ilus
Article in Spanish | LILACS | ID: biblio-1510352

ABSTRACT

Ultrasound regional blockade emerged that blocks the branches of the femoral nerve, obturator and accessory obturator that innervate the anterior hip capsule, the PENG block (group of pericapsular nerves), which by its Recent description does not have enough evidence in medical practice. To verify the analgesic effect of the PENG block in patients with hip fracture and its analgesic permanence during the first 10 hours after the block in patients admitted with a diagnosis of hip fracture, at the General Interzonal Hospital of Acute "Dr Oscar E Alende "From Mar del Plata, Argentina, in the months of May to November 2019. A prospective descriptive observational study was carried out with a total of 53 patients, hospitalized patients with a diagnosis of hip fracture, with standardized intravenous analgesic scheme and who have not yet undergone hip surgery. Pain was evaluated with the EVA scale (visual analog scale) prior to the blockage, and then at 30 min and 10 hours after the blockade, 15 ml of 1% lidocaine and 15 ml of bupivacaine at 0 were used. 25%, convex or linear ultrasound probe according to patient weight and 100 mm needle. In order to reproduce and evaluate the pain, the patients had a 30º flexion of the hip. Prior to the blockade, 66% of the patients had severe pain and 34% moderate pain, none presented mild pain or absence, both at thirty minutes and ten hours after the blockade, no patient presented severe pain and all patients presented analgesia with a decrease in more than three points on the VAS scale, in some cases reaching a decrease of 10 points on that scale. The PENG block is a regional anesthesia technique that provides very good analgesia to patients with hip fractures, therefore, it is an excellent saving strategy for systemic analgesics. Knowing the analgesia provided by the blockade at 30 min and at 10 h, it could be performed both in the preoperative period for the transfer and mobilization of the patient, as well as in the postoperative period, which could save the use of opioids and decrease hospital stay.


INTRODUCCIÓN La fractura de cadera es una emergencia ortopédica común en ancianos asociada a gran morbimortalidad, una adecuada analgesia regional perioperatoria determina un ahorro en el uso de analgésicos sistémicos. Recientemente, en el año 2018, surgió un nuevo bloqueo regional ecoguiado muy prometedor que bloquea las ramas del nervio femoral, obturador y obturador accesorio que inervan la capsula anterior de la cadera, el bloqueo PENG (grupo de nervios pericapsulares), el cual por su reciente descripción no cuenta con la suficiente evidencia en la práctica médica. OBJETIVOS: Comprobar el efecto analgésico del bloqueo PENG en pacientes con fractura de cadera y su permanencia analgésica durante las 10 primeras horas posteriores al bloqueo en los pacientes internados con diagnóstico de fractura de cadera, en el Hospital Interzonal General de Agudos "Dr. Oscar E Alende" de Mar del Plata, Argentina, en los meses de mayo a noviembre del 2019. MATERIALES Y MÉTODOS: Se realizó un estudio observacional descriptivo prospectivo con un total de 53 pacientes, se incluyeron pacientes internados con diagnóstico de fractura de cadera, con esquema analgésico endovenoso estandarizado y que aún no hayan sido sometido a cirugía de cadera. Se evaluó el dolor con la escala EVA (escala análoga visual) previo al bloqueo, y luego a los 30 min y a las 10 Hs de haber realizado el bloqueo, para este se utilizaron 15 ml lidocaína 1% y 15 ml de bupivacaína al 0,25%, sonda ecográfica convexa o lineal según el peso del paciente y aguja 100 mm. Para reproducir y evaluar el dolor se les realizo a los pacientes una flexión de 30º de la cadera. RESULTADOS: Previo al bloqueo el 66% de los pacientes tuvieron dolor severo y 34% dolor moderado, ninguno presentaba dolor leve o ausencia del mismo, tanto a los treinta minutos como a las diez horas posteriores al bloqueo ningún paciente presento dolor severo y todos los pacientes presentaron analgesia con una disminución en más de tres puntos en la escala de EVA, llegando en algunos casos a una disminución de 10 puntos de dicha escala. CONCLUSIONES: El bloqueo PENG es una técnica de anestesia regional que brinda muy buena analgesia a los pacientes con fractura de cadera, por consiguiente, es una excelente estrategia ahorradora de analgésicos sistémicos. Conociendo la analgesia que brinda el bloqueo a los 30 min y a las 10 h de realizado, se podría realizar dicho bloqueo tanto en el preoperatorio para el traslado y movilización del paciente, como en el post-operatorio, lo que podría ahorrar el uso de opioides y disminuir la estancia hospitalaria.


Subject(s)
Humans , Hip Fractures/diagnostic imaging , Anesthetics, Local/administration & dosage , Time Factors , Pain Measurement , Preoperative Care , Prospective Studies , Ultrasonography, Interventional , Dose-Response Relationship, Drug , Femoral Nerve/drug effects , Femoral Nerve/diagnostic imaging , Anesthesia, Conduction/methods , Anesthetics, Local/pharmacology , Obturator Nerve/drug effects , Obturator Nerve/diagnostic imaging
6.
Rev. bras. anestesiol ; Rev. bras. anestesiol;68(6): 558-563, Nov.-Dec. 2018. tab, graf
Article in English | LILACS | ID: biblio-977403

ABSTRACT

Abstract Background and objectives: An ultrasound guided femoral nerve block is an established analgesic method in patients with a hip fracture. Elevated cytokine levels correlate with poor patient outcomes after surgery. Hence, the aim of the study was to describe the levels of tumor necrosis factor-α after an ultrasound-guided femoral nerve block in elderly patients having a femoral neck fracture. Methods: A total of 32 patients were allocated into two treatment groups: 16 patients (femoral nerve block group; ultrasound-guided femoral nerve block with up to 20 mL of 0.3 mL.kg−1 of 0.5% bupivacaine and intravenous tramadol) and 16 patients (standard management group; up to 3 mL of 0.9% saline in the femoral sheath and intravenous tramadol). Tumor necrosis factor-α and visual analogue scale scores were evaluated immediately before the femoral nerve block and again at 4, 24, and 48 h after the femoral nerve block. All surgery was performed electively after 48 h of femoral nerve block. Results: The femoral nerve block group had a significantly lower mean tumor necrosis factor-α level at 24 (4.60 vs. 8.14, p < 0.001) and 48 h (5.05 vs. 8.56, p < 0.001) after the femoral nerve block, compared to the standard management group. The femoral nerve block group showed a significantly lower mean visual analogue scale score at 4 (3.63 vs. 7.06, p < 0.001) and 24 h (4.50 vs. 5.75, p < 0.001) after the femoral nerve block, compared to the standard management group. Conclusions: Ultrasound-guided femoral nerve block using 0.3 mL.kg−1 of 0.5% bupivacaine up to a maximum of 20 mL resulted in a significant lower tumor necrosis factor-α level.


Resumo Justificativa e objetivos: O bloqueio do nervo femoral guiado por ultrassom é um método analgésico estabelecido em pacientes com fratura de quadril. Níveis elevados de citocinas estão correlacionados com resultados desfavoráveis para o paciente após a cirurgia. Portanto, o objetivo do estudo foi descrever os níveis do fator de necrose tumoral alfa após bloqueio do nervo femoral guiado por ultrassom em pacientes idosos com fratura do colo de fêmur. Métodos: No total, 32 pacientes foram alocados em dois grupos de tratamento: 16 pacientes (grupo bloqueio do nervo femoral; bloqueio do nervo femoral guiado por ultrassom com até 20 mL de bupivacaína a 0,5% (0,3 mL.kg−1) e tramadol intravenoso) e 16 pacientes (grupo tratamento padrão, até 3 mL de solução salina a 0,9% na bainha femoral e tramadol intravenoso). Os escores do fator de necrose tumoral alfa e da Escala Visual Analógica foram avaliados imediatamente antes do bloqueio do nervo femoral e novamente em 4, 24 e 48 horas pós-bloqueio do nervo femoral. Todas as cirurgias foram realizadas de forma eletiva após 48 horas de bloqueio do nervo femoral. Resultados: O grupo bloqueio do nervo femoral teve um nível médio de fator de necrose tumoral alfa significativamente menor em 24 (4,60 vs. 8,14, p < 0,001) e 48 horas (5,05 vs. 8,56, p < 0,001) pós-bloqueio do nervo femoral, comparado com o grupo tratamento padrão. O grupo bloqueio do nervo femoral apresentou uma média significativamente menor no escore da Escala Visual Analógica em 4 (3,63 vs. 7,06, p < 0,001) e 24 horas (4,50 vs. 5,75, p < 0,001) pós-bloqueio do nervo femoral, em comparação com o grupo tratamento padrão. Conclusões: O bloqueio do nervo femoral guiado por ultrassom utilizando 0,3 mL.kg−1 de bupivacaína a 0,5% até o máximo de 20 mL resultou em um nível significativamente menor de fator de necrose tumoral alfa.


Subject(s)
Humans , Male , Female , Aged , Aged, 80 and over , Tumor Necrosis Factor-alpha/blood , Femoral Neck Fractures/blood , Nerve Block/methods , Ultrasonography, Interventional , Femoral Nerve/diagnostic imaging , Middle Aged
7.
Braz J Anesthesiol ; 68(6): 558-563, 2018.
Article in Portuguese | MEDLINE | ID: mdl-30143316

ABSTRACT

BACKGROUND AND OBJECTIVES: An ultrasound guided femoral nerve block is an established analgesic method in patients with a hip fracture. Elevated cytokine levels correlate with poor patient outcomes after surgery. Hence, the aim of the study was to describe the levels of tumor necrosis factor-α after an ultrasound-guided femoral nerve block in elderly patients having a femoral neck fracture. METHODS: A total of 32 patients were allocated into two treatment groups: 16 patients (femoral nerve block group; ultrasound-guided femoral nerve block with up to 20mL of 0.3mL.kg-1 of 0.5% bupivacaine and intravenous tramadol) and 16 patients (standard management group; up to 3mL of 0.9% saline in the femoral sheath and intravenous tramadol). Tumor necrosis factor-α and visual analogue scale scores were evaluated immediately before the femoral nerve block and again at 4, 24, and 48h after the femoral nerve block. All surgery was performed electively after 48h of femoral nerve block. RESULTS: The femoral nerve block group had a significantly lower mean tumor necrosis factor-α level at 24 (4.60 vs. 8.14, p<0.001) and 48h (5.05 vs. 8.56, p<0.001) after the femoral nerve block, compared to the standard management group. The femoral nerve block group showed a significantly lower mean visual analogue scale score at 4 (3.63 vs. 7.06, p<0.001) and 24h (4.50 vs. 5.75, p<0.001) after the femoral nerve block, compared to the standard management group. CONCLUSIONS: Ultrasound-guided femoral nerve block using 0.3mL.kg-1 of 0.5% bupivacaine up to a maximum of 20mL resulted in a significant lower tumor necrosis factor-α level.


Subject(s)
Femoral Neck Fractures/blood , Nerve Block/methods , Tumor Necrosis Factor-alpha/blood , Aged , Aged, 80 and over , Female , Femoral Nerve/diagnostic imaging , Humans , Male , Middle Aged , Ultrasonography, Interventional
8.
J Feline Med Surg ; 18(8): 620-5, 2016 08.
Article in English | MEDLINE | ID: mdl-26048901

ABSTRACT

OBJECTIVES: This study was conducted to validate the dorsal approach for femoral nerve (FN) blockade in cats and to verify the efficacy of the sole use of peripheral nerve electrolocation (PNE) or ultrasound (US)-guided technique to achieve the block. METHODS: This study was carried out in two phases. In phase 1, five adult experimental cats were used to validate the approach. In each cat, one FN was located by US and the accuracy of this location confirmed by PNE. Then, 2 mg/kg lidocaine 2% (diluted in saline to a final volume of 1 ml) was injected around the target nerve and the success of the blockade was evaluated. In phase 2, four adult experimental cats were included in two groups to verify the reliability of this approach to block eight FNs by the sole use of PNE (group 1) or US-guided technique (group 2). Evidence of motor blockade, time required to perform the blockade, onset time and duration of the blockades were determined. RESULTS: The FN was successfully located by US in all cats enrolled in phase 1, as confirmed by PNE in all cases. The success rate was clinically higher in group 2 (87.5%) than in group 1 (75.0%). The US-guided technique required less time to perform and produced blocks of longer duration. Recovery was uneventful in all cases. CONCLUSIONS AND RELEVANCE: The combined use of PNE and US-guided technique enabled validation of the dorsal approach for the FN blockade as it provided a successful FN blockade in all cases. The sole use of a US-guided technique may offer some advantages over the use of a sole PNE-guided technique to perform these blocks.


Subject(s)
Femoral Nerve/diagnostic imaging , Femoral Nerve/physiology , Nerve Block/veterinary , Ultrasonography, Interventional/veterinary , Animals , Cats , Electrophysiology , Nerve Block/methods , Reproducibility of Results
9.
Anesth Analg ; 113(5): 1276-8, 2011 Nov.
Article in English | MEDLINE | ID: mdl-21965350

ABSTRACT

BACKGROUND: We determined the sensitivity of motor responses evoked by stimulating catheters in determining catheter-nerve contact using ultrasonography as reference. METHODS: Femoral nerves were contacted using stimulating catheters under ultrasonography scanning in 25 patients. The output current was increased from its minimum until quadriceps muscle contraction occurred. The sensitivity of the motor response in determining catheter-nerve contact was calculated using 0.5 mA as current threshold. RESULTS: The current required for catheter stimulation to evoke a motor response ranged between 0.18 and 2.0 mA. Muscle contraction in response to 0.5 mA occurred in 16 of 25 subjects. The sensitivity of motor response for nerve stimulation was 64% (95% confidence interval: 0.43, 0.82). CONCLUSIONS: The absence of muscle responses at a stimulating current≤0.5 mA does not necessarily indicate the absence of catheter-nerve contact.


Subject(s)
Catheters , Femoral Nerve/physiology , Movement/physiology , Nerve Block/instrumentation , Adult , Anesthetics, Local/administration & dosage , Anesthetics, Local/pharmacology , Bupivacaine/administration & dosage , Bupivacaine/analogs & derivatives , Bupivacaine/pharmacology , Catheterization/methods , Electric Stimulation , Female , Femoral Nerve/diagnostic imaging , Humans , Knee/surgery , Levobupivacaine , Male , Muscle Contraction/physiology , Muscle, Skeletal/physiology , Needles , Orthopedic Procedures , Ultrasonography
10.
Rev Bras Anestesiol ; 60(4): 422-8, 2010.
Article in English, Portuguese | MEDLINE | ID: mdl-20659615

ABSTRACT

BACKGROUND AND OBJECTIVES: The use of the ultrasound to guide the puncture in peripheral nerve blocks has become increasingly more frequent. With the lower probability of promoting vascular damage the ultrasound has become an interesting tool in peripheral nerve blocks especially in patients in use of anticoagulants or with coagulopathies. The objective of this article was to report two cases in which ultrasound-guided sciatic and femoral nerve blocks were performed in anticoagulated patients. CASE REPORTS: In the first case, the patient underwent amputation of the left forefoot due to necrosis and signs of infection, and in the second case, surgical cleaning of the left knee. Patients had changes in coagulation with levels of activity of prothrombin and activated partial thromboplastin time above normal limits. Both patients underwent ultrasound-guided femoral and sciatic nerve blocks, evolving without motor or sensorial changes in the territories of those nerves and without hematoma at the site of puncture. CONCLUSIONS: Anticoagulation imposes some restrictions to classical regional anesthetic techniques. With the development of ultrasound equipment and methods, it is now possible to accurately identify vascular and neural structures. This allows ultrasound-guided puncture to be more precise, both to achieve the area of interest and to minimize the risks of accidental vascular damage. Until now, peripheral block was not recommended in anticoagulated patients or in those with coagulopathies. However, considering that few reports on ultrasound-guided regional blocks in coagulopathies can be found in the literature, the safety of this technique in this condition has yet to be established.


Subject(s)
Anticoagulants/therapeutic use , Femoral Nerve/diagnostic imaging , Nerve Block/methods , Sciatic Nerve/diagnostic imaging , Aged , Humans , Male , Ultrasonography
11.
Vet J ; 186(2): 210-5, 2010 Nov.
Article in English | MEDLINE | ID: mdl-19758827

ABSTRACT

Ten canine cadavers were used to investigate the anatomy and ultrasonographic approaches to the sciatic (ScN) and femoral (FN) nerves and to assess the accuracy of an ultrasound (US) guided technique to locate and block these nerves in the dog. The nerves of four sedated dogs were sought using US, blocked with 1% lidocaine and successful location confirmed by peripheral neurostimulation. The ScN was identified by US in all cases whereas the FN was not located in all cases. This study validates the usefulness of the US-guided technique to locate and block the ScN at the midfemoral level but the acoustic window of the inguinal region was less successful for locating and blocking the FN.


Subject(s)
Femoral Nerve/diagnostic imaging , Nerve Block/veterinary , Sciatic Nerve/diagnostic imaging , Ultrasonography, Interventional/veterinary , Anesthetics, Local/administration & dosage , Animals , Cadaver , Dogs , Electric Stimulation , Femoral Nerve/physiology , Lidocaine/administration & dosage , Nerve Block/methods , Sciatic Nerve/physiology
12.
Reg Anesth Pain Med ; 32(3): 221-6, 2007.
Article in English | MEDLINE | ID: mdl-17543817

ABSTRACT

BACKGROUND AND OBJECTIVES: Obturator-nerve block improves analgesia for knee surgery. Traditional techniques rely on surface landmarks, which can be variable and result in excessive performance times and multiple needle passes. The objective of this study was to evaluate a novel ultrasound-guided technique for localizing the obturator nerve. METHODS: A total of 22 patients undergoing anterior cruciate ligament repair had ultrasound-guided obturator-nerve blocks. Needles were directed under real-time ultrasound guidance. Endpoint for injection consisted of identifying contact of the tip of an insulated needle to nerve confirmed by adductor muscles' contraction. Local anesthetic was injected, and block was evaluated within 30 minutes. After that, ultrasound-guided sciatic-femoral blocks were placed for surgical purposes. Data collected included: time required for nerve identification, minimum stimulating current, number of attempts for correct identification, preblock and postblock adductor muscles' strength, sensory-nerve block, and quality of surgical anesthesia. RESULTS: In 91% of cases, the obturator nerve was correctly identified on first attempt within 30 +/- 23 seconds, as a hyperechoic flat or lip-shaped structure with internal hypoechoic dots. Minimal intensity of current to nerve stimulation was 0.30 +/- 0.08 mA. All patients exhibited decreases in adductor strength. Sensory territories were variable, with no cutaneous distribution in 32% of the patients. Small-dose opioid supplementation was required in 14% of the patients, but none required general anesthesia to complete surgery. CONCLUSIONS: These preliminary data suggest that ultrasound-guided obturator-nerve identification and block are technically easy and highly successful.


Subject(s)
Amides , Analgesia/methods , Anesthetics, Local , Anterior Cruciate Ligament/surgery , Nerve Block , Obturator Nerve/diagnostic imaging , Pain/prevention & control , Ultrasonography, Interventional , Adult , Analgesics, Opioid/therapeutic use , Electric Stimulation , Female , Femoral Nerve/diagnostic imaging , Humans , Male , Muscle Contraction , Muscle Strength , Muscle, Skeletal/innervation , Pilot Projects , Prospective Studies , Ropivacaine , Sciatic Nerve/diagnostic imaging , Time Factors , Treatment Outcome
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