Analgesia post operatoria con morfina intratecal en cirugía proctológica / Post-operative analgesia with intrathecal morphine in proctologic surgery

RESUMEN Introducción: el dolor postoperatorio es la queja más frecuente de los pacientes que han sufrido una intervención quirúrgica, no es el resultado "obligado" de una intervención, sino de una insuficiente analgesia; cuando se asume este por los anestesiólogos de forma estable y estructurada, el uso de los analgésicos y anestésicos locales es más racional y eficaz, no sólo por mayor conocimiento de los mismos, sino porque se incrementan las vías de administración más efectivas. Objetivo: determinar los beneficios del uso de la morfina intratecal en los pacientes quirúrgicos de proctología. Método: se realizó un estudio observacional, descriptivo longitudinal, retrospectivo, en el periodo comprendido del 1ro de enero al 30 de junio 2017. La muestra quedó constituida por 50 pacientes portadores de afecciones ano rectales, a las cuales se les aplico anestesia regional con morfina intratecal. Se excluyeron pacientes con patologías dolorosas crónicas, hipersensibilidad conocida al medicamento y/o anestésicos locales y contraindicaciones para la anestesia espinal. Los datos se procesaron por números y porcientos. Resultados: predominaron en el estudio los pacientes con edades de 31-40 años, (46%), el sexo masculino; (58%), los efectos adversos comunes fueron el prurito,(20%), y nausea /vómitos; (8%). Conclusiones: se logró buena analgesia con prolongación de hasta 20 horas en la mayoría de los pacientes con muy baja frecuencia de efectos adversos.

ABSTRACT Introduction: postoperative pain is the most frequent complaint of patients who have undergone surgery, it is not the "forced" result of an intervention, but of an insufficient analgesia; When this is assumed by anesthesiologists in a stable and structured way, the use of local anesthetics and analgesics is more rational and effective, not only because of greater knowledge of them, but also because the most effective administration routes are increased. Objective: to determine the benefits of the use of intrathecal morphine in surgical proctology patients. Method: an observational, descriptive, longitudinal, retrospective study was carried out in the period from January 1 to June 30, 2017. The sample consisted of 50 patients with anus rectal affections, to whom regional morphine anesthesia was applied. intrathecal We excluded patients with chronic painful pathologies, known hypersensitivity to the medication and / or local anesthetics and contraindications for spinal anesthesia. The data was processed by numbers and percents. Results: patients aged 31-40 years (46%), male sex, predominated in the study; (58%), the common adverse effects were pruritus, (20%), and nausea / vomiting; (8%). Conclusions: good analgesia was achieved with prolongation of up to 20 hours in the majority of patients with very low frequency of adverse effects.

Morphologic changes in the spinal cord following intrathecal palonosetron-HCl injection in rats

BACKGROUND: Intravenous palonosetron-HCl, a second-generation antagonist of selective serotonin type 3 (5-HT3) receptors, can prevent chemotherapy-induced nausea and vomiting (CINV) and postoperative nausea and vomiting (PONV). 5-HT3 receptors are abundant in the lower brainstem and the substantia gelatinosa of the spinal cord, which provides a theoretical rationale for neuraxial administration of 5-HT3 receptor antagonists for CINV, PONV, and opioid-induced nausea and vomiting. However, there are no reports of neuraxial administration of palonosetron-HCl. Before neuraxial administration of a drug is accepted for clinical use, its safety must be proven. This study was conducted to determine whether neuraxial administration of palonosetron-HCl produces neurologic injury. METHODS: Male Sprague-Dawley rats under general anesthesia were catheterized intrathecally and the catheter tip was advanced caudally to the L1 vertebra. After 7 days, 20 µl of normal saline (N group, n = 6) or 20 µl (1 µg) of palonosetron-HCl (P group, n = 6) were injected intrathecally once per day for 2 weeks. Neurotoxic changes were evaluated by light microscopy (LM) and electron microscopy (EM) of the spinal cord. Behavioral changes were also evaluated in both groups. RESULTS: One of the N group rats and three of the P group rats demonstrated abnormal behavior during intrathecal drug injection, but otherwise their behavior was normal. The spinal cords of the N group did not have any abnormal findings by LM or EM. The spinal cords of the P group had multiple vacuoles in the white matter by LM, especially in the dorsal funiculus, and EM revealed myelin, axonal, and mitochondrial swelling. CONCLUSIONS: Results suggest that chronic intrathecal administration of palonosetron-HCl produced microscopic morphologic changes in the spinal cords of rats.

Musculoskeletal intervention

Musculoskeletal intervention has significantly evolved over the last decade. A major reason for recent advancements could be attributed to the widespread use of image-guided techniques utilizing computed tomography, fluoroscopy, and ultrasonography. This change improved the approach of needles to the areas of pathology and decreased complication rates. This article reviews basic principles of the common image-guided diagnostic and therapeutic techniques as they relate to patients with musculoskeletal disease.

Diffusion-Weighted Imaging for Pretreatment Evaluation and Prediction of Treatment Effect in Patients Undergoing CT-Guided Injection for Lumbar Disc Herniation

OBJECTIVE: To determine whether a change in apparent diffusion coefficient (ADC) value could predict early response to CT-guided Oxygen-Ozone (O2-O3) injection therapy in patients with unilateral mono-radiculopathy due to lumbar disc herniation. MATERIALS AND METHODS: A total of 52 patients with unilateral mono-radiculopathy received a single intradiscal (3 mL) and periganglionic (5 mL) injection of an O2-O3 mixture. An ADC index of the involved side to the intact side was calculated using the following formula: pre-treatment ADC index = ([ADC involved side - ADC intact side] / ADC intact side) x 100. We analyzed the relationship between the pre-treatment Oswestry Disability Index (ODI) and the ADC index. In addition, the correlation between ODI recovery ratio and ADC index was investigated. The sensitivity and specificity of the ADC index for predicting response in O2-O3 therapy was determined. RESULTS: Oswestry Disability Index and the ADC index was not significantly correlated (r = -0.125, p = 0.093). The ADC index and ODI recovery ratio was significantly correlated (r = 0.819, p < 0.001). When using 7.10 as the cut-off value, the ADC index obtained a sensitivity of 86.3% and a specificity of 82.9% for predicting successful response to therapy around the first month of follow-up. CONCLUSION: This preliminary study demonstrates that the patients with decreased ADC index tend to show poor improvement of clinical symptoms. The ADC index may be a useful indicator to predict early response to CT-guided O2-O3 injection therapy in patients with unilateral mono-radiculopathy due to lumbar disc herniation.

Transverse Process and Needles of Medial Branch Block to Facet Joint as Landmarks for Ultrasound-Guided Selective Nerve Root Block

BACKGROUND: Selective lumbar nerve root block (SNRB) is generally accepted as an effective treatment method for back pain with sciatica. However, it requires devices producing radioactive materials such as C-arm fluoroscopy. This study evaluated the usefulness of the longitudinal view of transverse process and needles for medial branch block as landmarks under ultrasonography. METHODS: We performed selective nerve root block for 96 nerve roots in 61 patients under the guidance of ultrasound. A curved probe was used to identify the facet joints and transverse processes. Identifying the lumbar nerve roots under the skin surface and ultrasound landmarks, the cephalad and caudal medial branch blocks were undertaken under the transverse view of sonogram first. A needle for nerve root block was inserted between the two transverse processes under longitudinal view, while estimating the depth with the needle for medial branch block. We then injected 1.0 mL of contrast medium and checked the distribution of the nerve root with C-arm fluoroscopy to evaluate the accuracy. The visual analog scale (VAS) was used to access the clinical results. RESULTS: Seven SNRBs were performed for the L2 nerve root, 15 for L3, 49 for L4, and 25 for L5, respectively. Eighty-six SNRBs (89.5%) showed successful positioning of the needles. We failed in the following cases: 1 case for the L2 nerve root; 2 for L3; 3 for L4; and 4 for L5. The failed needles were positioned at wrong leveled segments in 4 cases and inappropriate place in 6 cases. VAS was improved from 7.6 +/- 0.6 to 3.5 +/- 1.3 after the procedure. CONCLUSIONS: For SNRB in lumbar spine, the transverse processes under longitudinal view as the ultrasound landmark and the needles of medial branch block to the facet joint can be a promising guidance.

Effect of Medial Branch Block in Chronic Facet Joint Pain for Osteoporotic Compression Fracture: One Year Retrospective Study

OBJECTIVE: To evaluate the outcomes of medial branch block in facet joint pain for osteoporotic compression fracture and utilize multiple regression, the relationship between their impact on treatment outcome and other factor, such as the radiologic finding, clinical parameters was analyze. METHODS: Fifty-three patients with axial back pain from osteoporotic compression fracture were enrolled. The clinical outcomes were measured by Verbal Numeric Rating Scale (VNS) and Oswestry Disability Index (ODI) before treatment, 2 weeks, 3 months, and 12 months after the medial branch block. Radiographic analysis included measurement of overall sagittal alignment, collapsed vertebral height, and vertebral kyphotic angle. After 12 months, patients' satisfaction was classified to five categories: excellent, good, fair, poor or fail. Statistical analysis of both radiographic and clinical parameters along with treatment outcome was performed to determine any significant correlations between the two. RESULTS: VNS and ODI was improved 2 weeks after the injection and continued to improve until 12 months. Significant improvement with significant pain relief (>40%), functional improvement (>20%), and the patients rated their satisfaction level as "excellent" or "good" at 12 months after the first injection were observed in 78.9%. The radiographic and clinical parameters were not significantly correlated with treatment outcome. CONCLUSION: Our retrospective study demonstrated that the medial branch block provided significant pain relief and functional recovery to the patients with osteoporotic spinal compression fractures complaining of continuous facet joint pain after vertebroplasty or conservative treatment. A placebo-controlled prospective randomized double-blind study should be conducted in the future to evaluate the treatment effects.

Manejo del síndrome de abstinencia por interrupción del baclofeno / Management Baclofen Withdrawal Syndrome

La terapia con baclofeno intratecal es un tratamiento que puede aliviar algunos de los síntomas de la espasticidad severa. Actualmente, la infusión de baclofeno intratecal se utiliza principalmente para el manejo de la espasticidad asociada con parálisis cerebral, lesiones cerebrales o de columna vertebral, traumatismo craneoencefálico, encefalopatía anóxica, esclerosis múltiple, distonía, secuelas de accidente cerebrovascular y síndrome del hombre rígido, especialmente para los pacientes que no responden a otros tratamientos. Los pacientes pueden sufrir efectos secundarios en sistema nervioso central con este manejo, como consecuencia de un error de dosificación del baclofeno en la bomba. El cese repentino de la administración del baclofeno intratecal puede causar síntomas, que van desde leves hasta graves. Presentamos un caso de síndrome de abstinencia por baclofeno intratecal y su manejo exitoso en un paciente en que se desarrolló espasticidad severa.

Intrathecal baclofen therapy is a treatment that can relieve some symptoms of severe spasticity. Currently intrathecal baclofen infusion is used primarily for spasticity associated with cerebral palsy, brain or spinal injury, traumatic brain injury, anoxic encephalopathy, multiple sclerosis, dystonia, stroke and stiff-man syndrome, particularly for those patients who are unresponsive. Patients can present central nervous system side effects, this can occur as a result of the pump delivering an incorrect dose of baclofen. Sudden cessation of Intrathecal baclofen administration can cause mild to severe symptoms. We report a case of Intrathecal baclofen withdrawal syndrome developing severe spasticity and its management.

Role of calcitonin gene related peptide,ATP sensitive potassium channel and spinal nerve in the protective effects of intrathecal morphine preconditioning against myocardial postischemia injury in rats / 中国药理学通报

Aim To investigate the role of calcitonin gene related peptide(CGRP),ATP sensitive potassium channel(KATP)and spinal nerve in the protective effect of intrathecal morphine preconditioning against myocardial postischemia injury in rats.Methods Rats were established intrathecal catheter placement and myocardial ischemia reperfusion models were randomly assigned to 10 groups:control group(CON);intravenous dimethylsulfoxide group(DMSO);intravenous CGRP8-37 group(CGRP8-37,a selective CGRP receptor antagonist,3 nmol?kg~-1);intravenous glibenclamide group(GLI,a non-selective KATP channel inhibitor,0.3 mg?kg~-1);intrathecal 10 ?l of 1% lidocaine group(LID);intrathecal 3?1 ?g?kg~-1 morphine preconditioning group(MPC);intravenous 3 nmol?kg~-1 CGRP8-37+MPC group(CGRP8-37+MPC);intravenous 0.3 mg?kg~-1 GLI+MPC group(GLI+MPC);intravenous 0.3 mg?kg~-1 GLI+LID group(GLI+LID).Indicators to be observed were MAP,HR and RPP(MAP?HR),the volume of area at risk(AAR)and infarct size(IS),and the area of myocardial infarction,which was demonstrated by IS/AAR.Results Compared to CON group,the volume of IS and IS/AAR was reduced in MPC,LID,LID+MPC and GLI+LID group(P