جستجوی مقالات مرتبط با کلیدواژه "sensory block" در نشریات گروه "پزشکی"

When performing spinal anesthesia for cesarean section, it is important to determine the appropriate anesthetic dose as well as to predict the level of spinal anesthesia. In this study, it was hypothesized that some anthropometric measurements may be related to maximum sensory block and hemodynamic changes.

The aim of this study are to find maternal anthropometric values that are correlate with the level of spinal anesthesia.

Maternal anthropometric measurements, including height, weight, supine and standing abdominal circumference (AC), and hip circumference, were recorded before spinal anesthesia for cesarean section. Spinal anesthesia was induced by administering 8 mg of 0.5% hyperbaric bupivacaine and 20 μg of fentanyl at the L3-L4 interspace. The level of sensory block was determined using pin-prick at 1, 5, 10, and 15 minutes after spinal anesthesia. The sensory block level and hemodynamic adverse events were analyzed in relationship to anthropometric measurements.

The supine AC/height ratios significantly correlate with the maximal sensory block level at 5, 10, and 15 minutes after the injection of spinal anesthetic (P = 0.001, P < 0.001 and P < 0.001, respectively). Further, there were significant correlations between body mass index (BMI) and sensory block level at every assessment (P = 0.041, P = 0.002, P = 0.001 and P < 0.001, respectively). When comparing the groups with and without hypotension, BMI, weight, and supine AC/height ratio were found to be significantly higher in the group with hypotension (P = 0.002, P = 0.004 and P = 0.006, respectively).

We conclude that BMI and AC/height ratio correlate with the sensory block level of spinal anesthesia for cesarean section.

 Spinal anesthesia is the method of choice for the cesarean section. Hypotension is a common complication of this method.

 This study aimed to compare the effect of spinal anesthesia in the sitting and lateral positions on the onset time of sensory block and hemodynamic condition in cesarean sections.

 In this clinical trial, 106 elective cesarean section candidates under spinal anesthesia were selected and randomly divided into two groups: spinal anesthesia in the sitting position (group S) and the lateral position (group L). The onset time of the sensory block, quality of sensory and motor block, hemodynamic condition, frequency of hypotension, nausea, and vomiting, and the doses of ephedrine and atropine were compared between both groups. Data were analyzed with SPSS version 16 software at a 95% confidence level.

 There was no statistically significant difference between the two groups in terms of age. The frequency of hypotension in L and S groups was 24.5% and 57.7%, respectively (P = 0.001), in minute 6 after spinal anesthesia and 5.7% and 36.5%, respectively (P < 0.001), in minute 8 after spinal anesthesia. The mean time to reach the sensory level of T6 was 1.30 ± 0.43 min versus 4.54 ± 2.12 min (P < 0.001), motor block score in minute 5 was 2.98 ± 0.14 versus 2.82 (P = 0.044), and ephedrine dose was 11.5 mg and 16.92 mg in the L and S groups, respectively (P = 0.010). The maximum sensory-motor block and satisfaction of women with spinal anesthesia were significantly higher in the lateral position than in the sitting position (P < 0.05).

 Cesarean sections under spinal anesthesia in the lateral position than in the sitting position lead to a more rapid sensory and motor block, reduced ephedrine consumption, and enhanced satisfaction of women.

Spinal anesthesia is the most common technique used for cesarean delivery due to some advantages compared to regional anesthesia. It is easily performed and provides a rapid onset of block. Though bupivacaine is a generally used long-acting amide type local anesthetic drug for spinal anesthesia, ropivacaine may sometimes be selected.

This prospective, randomized, double-blinded study was aimed at comparing clinical efficacy and safety between ropivacaine and bupivacaine during cesarean section.

After getting ethical committee approval and written informed consent, 65 women who referred to Imam Khomeini Hospital of Ahvaz, Iran in 2018 were chosen for elective cesarean delivery under spinal anesthesia. They were randomly allocated to receive either ropivacaine 1% (n = 33) or bupivacaine 0.5% (n = 32). Afterwards, the differences in the anesthetic efficacy, vital signs,
and hemodynamics of participants between the two groups were recorded.

Duration of sensory block was shorter in the ropivacaine group than bupivacaine group (132.521.6 min vs. 175.826.2 min; P < 0.001). Ropivacaine also produced a shorter duration of motor blockade than bupivacaine (124.820.2 min vs. 168.221.7 min; P < 0.001). There is no difference between the two groups in terms of systolic and diastolic blood pressure, but the heart rate
of patients in the bupivacaine group is significantly higher than the ropivacaine group.

The results suggest that ropivacaine and bupivacaine are two efficient drugs in anesthesia in the cesarean section, ropivacaine is a better choice due to little influence on the hemodynamics and shorter duration of sensory block and motor block which are useful for the recovery and also safe to the patients.