Spinal Anaesthesia For Caesarean Section Research Articles

Forced-air warming and continuous core temperature monitoring with zero-heat-flux thermometry during cesarean section: a retrospective observational cohort study

BackgroundOver 30% of parturients undergoing spinal anesthesia for cesarean section become intraoperatively hypothermic. This study assessed the magnitude of hypothermic insult in parturients and newborns using continuous, high-resolution thermometry and evaluated the efficiency of intraoperative forced-air warming for prevention of hypothermia. MethodsOne hundred and eleven parturients admitted for elective or emergency cesarean section under spinal anesthesia with newborn bonding over a 5-month period were included in this retrospective observational cohort study. Patients were divided into two groups: the passive insulation group, who received no active warming, and the active warming group, who received convective warming through an underbody blanket. Core body temperature was continuously monitored by zero-heat-flux thermometry and automatically recorded by data-loggers. The primary outcome was the incidence of hypothermia in the operating and recovery room. Neonatal outcomes were also analyzed. ResultsThe patients in the passive insulation group had significantly lower temperatures in the operating room compared to the actively warmed group (36.4°C vs. 36.6°C, p = 0.005), including temperature at skin closure (36.5°C vs. 36.7°C, p = 0.017). The temperature of the newborns after discharge from the postanesthetic care unit was lower in the passive insulation group (36.7°C vs. 37.0°C, p = 0.002); thirteen (15%) of the newborns were hypothermic, compared to three (4%) in the active warming group (p < 0.01). ConclusionForced-air warming decreases perioperative hypothermia in parturients undergoing cesarean section but does not entirely prevent hypothermia in newborns while bonding. Therefore, it can be effectively used for cesarean section, but special attention should be given to neonates.

Machine learning approach to needle insertion site identification for spinal anesthesia in obese patients

BackgroundUltrasonography for neuraxial anesthesia is increasingly being used to identify spinal structures and the identification of correct point of needle insertion to improve procedural success, in particular in obesity. We developed an ultrasound-guided automated spinal landmark identification program to assist anesthetists on spinal needle insertion point with a graphical user interface for spinal anesthesia.MethodsForty-eight obese patients requiring spinal anesthesia for Cesarean section were recruited in this prospective cohort study. We utilized a developed machine learning algorithm to determine the needle insertion point using automated spinal landmark ultrasound imaging of the lumbar spine identifying the L3/4 interspinous space (longitudinal view) and the posterior complex of dura mater (transverse view). The demographic and clinical characteristics were also recorded.ResultsThe first attempt success rate for spinal anesthesia was 79.1% (38/48) (95%CI 65.0 - 89.5%), followed by successful second attempt of 12.5% (6/48), third attempt of 4.2% (2/48) and 4th attempt (4.2% or 2/48). The scanning duration of L3/4 interspinous space and the posterior complex were 21.0 [IQR: 17.0, 32.0] secs and 11.0 [IQR: 5.0, 22.0] secs respectively. There is good correlation between the program recorded depth of the skin to posterior complex and clinician measured depth (r = 0.915).ConclusionsThe automated spinal landmark identification program is able to provide assistance to needle insertion point identification in obese patients. There is good correlation between program recorded and clinician measured depth of the skin to posterior complex of dura mater. Future research may involve imaging algorithm improvement to assist with needle insertion guidance during neuraxial anesthesia.Trial registrationThis study was registered on clinicaltrials.gov registry (NCT03687411) on 22 Aug 2018.

Comparison of intravenous bolus doses of phenylephrine vs ephedrine along with crystalloid co-loading in the prevention of hypotension during spinal anesthesia for caesarean section

Caesarean section was the first obstetrical operation that saves the life of the baby when normal delivery fails. Spinal anaesthesia is the most appropriate method for caesarean section. But hypotension is the most common side effect of it in patient with pregnant uterus. To compare the vasopressor effects of ephedrine and phenylephrine in ameliorating hypotension in elective caesarean delivery receiving crystalloid coloading, during intrathecal bupivacaine injection.: Study participants were randomly divided into two groups of 50 patients each. After subarachnoid block, all the parturients were given rapid administration of ringer lactate solution 20ml/kg, during the initial 5 minutes of surgery the parameters such as oxygen saturation, blood pressure and pulse rate recorded for every one minute followed by every five minutes until the completion of the surgery. The incidence of hypotension, bradycardia, nausea/vomiting, block height and requirements of vasopressor (ephedrine and phenylephrine) were recorded. Apgar score, and blood sample from umbilical cord was taken and sent for blood gas analyses to determine the neonatal outcome.: Vasopressor consumption was more in phenylephrine group (92±112 µg) compared to ephedrine group (4.8±5.5 mg) which was statistically significant p=0.0001. The neonatal outcome was statistically significant regarding umbilical cord pH (Group E-7.2±0.06 and Group P-7.37±0.04 with p=0.002) but clinically no true fetal acidosis in either groups and no significant changes regarding Apgar score in the two groups.: Thus we conclude that that ephedrine 6 mg and phenylephrine 100 µg does not differ in their efficacy to manage hypotension during spinal anaesthesia for caesarean delivery. However, maternal bradycardia was more in the phenylephrine group with equal incidence of fetal acidosis in the study groups.

Correlation Between Anthropometric Measurements and Sensory Block Level of Spinal Anesthesia for Cesarean Section

BackgroundWhen 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.ObjectivesThe aim of this study are to find maternal anthropometric values that are correlate with the level of spinal anesthesia.MethodsMaternal 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.ResultsThe 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).ConclusionsWe conclude that BMI and AC/height ratio correlate with the sensory block level of spinal anesthesia for cesarean section.

Norepinephrine versus Ephedrine Boluses To Treat Spinal-Induced Hypotension in Cesarean Deliveries

Abstract Corresponding Background Cesarean sections normally require an anesthetic block at T4 level, so hypotension is reported to occur in up to 80% of spinal anesthesia cases. When maternal hypotension associated with spinal anesthesia for cesarean section is severe and sustained, it can lead to serious maternal complications as well as impairment of the uterine and placental blood flow with consecutive fetal hypoxia, acidosis, and neurological injury. Aim of the Work to compare the administration of intermittent i.v. boluses of norepinephrine and ephedrine to counterbalance the hypotensive effect of spinal anesthesia during cesarean delivery. The results of the study showed that compared with ephedrine, norepinephrine maintained maternal blood pressure and uterine artery blood flow. Further, it was associated with lower numbers of hypotension and hypertension episodes and less frequency of bradycardia and tachycardia during cesarean delivery. Furthermore, the numbers of boluses of vasopressors used during spinal anesthesia were lower in norepinephrine compared with the use of ephedrine. Conclusion Norepinephrine can be used as an alternative vasopressor to maintain maternal blood pressure during spinal anesthesia for cesarean delivery, with no adverse effect on neonatal outcome.

Effect of addition of intrathecal magnesium sulphate to 0.5% hyperbaric bupivacaine and 0.5% isobaric levobupivacaine on duration of analgesia in parturients undergoing elective caesarean section: A prospective randomised study.

Background and Aims:Addition of magnesium sulfate to local anesthetics improves the quality of spinal anesthesia for caesarean section. The aim of this study was to compare the effects of intrathecal 0.5% hyperbaric bupivacaine with 75-mg magnesium sulfate (MgSO4) and 0.5% isobaric levobupivacaine with 75-mg MgSO4 on the duration of analgesia in parturients undergoing elective caesarean section.Material and Methods:This prospective randomized double-blind parallel-group study was conducted in 60 parturients undergoing elective caesarean section who were randomly allocated to Group I or Group II to receive either 2 ml of 0.5% levobupivacaine with 75-mg MgSO4 or 2 ml of 0.5% hyperbaric bupivacaine with 75-mg MgSO4 intrathecally. The duration of postoperative analgesia along with sensory and motor block characteristics and hemodynamics were studied.Results:The duration of analgesia did not show a significant difference in the two groups (P = 0.175). The sensory onset time was faster in Group I (3.5 ± 1.3 min) as compared to that in Group II (4.8 ± 2 min; P = 0.004). The onset of motor blockade was not different in the two groups (P = 0.265), but there was a significant delay (P = 0.002) in motor recovery in Group II (267 ± 130.6 min) as compared to Group I (225 ± 85.4 min). Hemodynamics were comparable in the two groups.Conclusion:Intrathecal levobupivacaine with MgSO4 produces a similar duration of postoperative analgesia as compared to hyperbaric bupivacaine with MgSO4. Early motor recovery allowing early ambulation postoperatively makes isobaric levobupivacaine with MgSO4 a good alternative for caesarean sections.

Comparison of 1-and 2- Minute Sitting Position Versus Immediately Lying Down of Hemodynamic Variables after Spinal Anesthesia with Hyperbaric Bupivacaine in Elective Cesarean Section

the aim of current study: was Comparison of 1-and 2- minute sitting position versus immediately lying down on hemodynamic variables after spinal anesthesia with hyperbaric bupivacaine in elective cesarean section. Patients and methods: This study was performed after the approval of the Iraqi Council for Medical Specialization in anesthesia and intensive care, and after obtaining the consents from 90 pregnant women (at term) who were candidate for cesarean section with spinal anesthesia were recruited in this study. They were collected from “AL-Imamain AL-Kademain Medical City Teaching Hospital” (July 2017 – January 2018) , All patients were premedicated with 10mg IV metoclopramide and 50mg IV ranitidine , Base line blood pressure and the pulse rate were recorded initially before intervention , the Lumbar puncture was performed in the sitting position under full aseptic teqnique , For assessment of blood pressure and pulse rate, ten readings were taken at (3, 5, 10, 15, 20, 25, 30, 35,40and 60 min) using an automated noninvasive blood pressure. Pulse rate monitored by electrocardiogram and oximetry (SPO2). Results: Current study showed higher means of pulse rate than the other two groups especially at early times after anesthesia induction. On the other hand, both group A1 and A2 showed higher mean of systolic, diastolic and mean blood pressure than group B especially 3, 5, 10 and 15 minutes after anesthesia induction, so the variation of pulse rate over the time in the three groups. Group B had higher pulse rate Journal of University of Shanghai for Science and Technology ISSN: 1007-6735 Volume 23, Issue 9, September – 2021 Page-7882 than the other two groups at 3,5,10, 25 and 40 minutes with significant difference (P8 in all groups. Conclusions: This study revealed that the patient’s position is an important factor, which affects the frequency of Hypotension and the onset of sensory block , as well as Administration of spinal anesthesia for cesarean section. Based on the findings, keeping the parturient seated for 1 Or 2 minutes after spinal anesthesia, compared to immediately lying down, could decrease the frequency of hypotension.

Case report: Spinal anesthesia for cesarean section in a parturient with Potocki-Lupski syndrome

BackgroundPotocki -Lupski syndrome is an uncommon disorder caused by a micro-duplication in chromosome 17p11.2. Variable clinical manifestations bring troubles to the general and neuraxial anesthesia, including mental retardation, facial dysmorphisms, structural cardiovascular anomalies, scoliosis, and malignant hyperthermia. Until now, the anesthesia management for cesarean section in these patients has not been reported yet.Case presentationHere we present a 23-year-old Chinese parturient with Potocki -Lupski syndrome who underwent elective cesarean section under spinal anesthesia. She was transferred to our hospital in her 40th week of gestation. She had a history of IgA nephropathy for more than three years and was diagnosed with Potocki -Lupski syndrome (17p12p11.2 segment 3.1 Mb repeat) in the 29th week of pregnancy. Amniocentesis showed the fetus had no abnormal autosomes. Preoperative multidisciplinary consultation suggested that she should terminate the pregnancy as soon as possible. She was ASA II. Her BMI was 26.43 kg/m2. Her airway evaluation was normal. Her spine could bend well and her spinal interspace could be touched clearly. We did the single spinal anesthesia at L2-3 interspace and gave 0.5% bupivacaine 1.7 ml. The absolute anesthesia level reached T8. The Apgar score for the newborn infant was 10 for 1st minute, 5th minute, and 10th minute. The vital signs were steady without using any vasoactive drugs. The patient had a good prognosis, and was subsequently discharged from hospital.ConclusionTo date, the case may be the first reported spinal anesthesia for the parturient with Potocki -Lupski syndrome. Although its manifestations are variable, the spinal anesthesia is feasible under careful and comprehensive preoperative evaluation.

Shivering control in women under spinal anesthesia: A reviewed study of the role of anesthetics

Introduction: Prevention and control of maternal shivering during spinal anesthesia for cesarean section is very important in the appropriate outcomes of surgery, however, choosing the appropriate drug for this should be associated with few side effects for mother and baby. Therefore, this study was performed to evaluate the drugs used to control shivering in women under spinal anesthesia.Methods: The present study was a narrative review study. In this study, to find related studies, researchers conducted a computer search in the SID, Magiran and Google Scholar databases with Persian keywords including: spinal anesthesia, spinal anesthesia, shivering and cesarean section. In the initial stage of searching for studies, 364 studies were reviewed. The researchers then reviewed the searched articles and 341 studies were deleted because they were not related to the subject. Inclusion criteria for the present study included: Persian articles that dealt only with shivering in spinal anesthesia during cesarean section and also original research articles of clinical trial type. Exclusion criteria also included not having access to the full text of the article, abstracts of congressional papers, or conferences, and review or meta-analysis papers. Finally, 13 studies were used to write this study.Results: In reviewing the research background, different studies used different drugs to prevent shivering after cesarean section. Shivering after spinal anesthesia has been the specific goal of many studies with clinical trial design. Interventions in this regard included: intrathecal or intravenous injection of drugs such as magnesium sulfate, hydrocortisone, .

Effect of Ondansetron on Blood Pressure during Elective Cesarean Section under Spinal Anesthesia at Baghdad Teaching Hospital

Background: Hypotension is a very common consequence of the sympathetic vasomotor block caused by spinal anesthesia for caesarean section. Maternal symptoms such as nausea, vomiting and dyspnea frequently accompany severe hypotension, and adverse effects on the fetus, including depressed Apgar scores and umbilical acidosis, have been correlated with severity and duration of hypotension.&#x0D; Aim: To investigate the effect of Ondansetron use on the prevention of hypotension and the amount of vasopressor needed to control the hypotension after spinal anesthesia.&#x0D; Methods: This is a prospective double blind, randomized trial carried out in Obstetric Operation room of Baghdad Teaching Hospital, Medical city, Iraq from November, 2018 to August, 2019. Total number of 128 women assessed for eligibility and only 87 were included and allocated into 2 groups. The Ondansetron group (45 women) received 6 mg Ondansetron IV e min before induction of spinal anesthesia. The Placebo group received 3 ml normal saline as placebo before induction. The number of rescue drugs (vasopressors, antiemetic, anti-shivering), vital signs and side effects were recorded each 3 minutes from baseline to 45th minute.&#x0D; Results: The incidence of hypotension, nausea, vomiting and the need for vasopressors and metoclopramide were significantly lower in Ondansetron group than placebo group (p = 0.001, 0.02, 0.003, &lt; 0.001, and 0.001, respectively). Shivering and the need of pethidine for treating this side effect was non significantly lower in ondansetron group than placebo group.&#x0D; Conclusions: The preoperative administration of Ondansetron in cesarean section reduces the risk of spinal anesthesia-induced hypotension, prevents the nausea and vomiting attacks and decreases the need to vasopressors and metoclopramide.&#x0D; Keywords: Spinal anesthesia, caesarian section, ondansetron, hypotension

Comparative Study of Intrathecal Bupivacaine versus Bupivacaine With Fentanyl for Post-Operative Analgesia in an Elective Cesarean Section at a Tertiary Care Centre

Introduction: Spinal anaesthesia for cesarean section has been the preferred technique for majority of anaesthesiologist. The finite duration of spinal anaesthesia is the only drawback as compared to general anaesthesia. Therefore combination of local anaesthetics with intrathecal opioids makes it possible to achieve prolonged post-operative analgesia without affecting the mother and the baby. Aims And Objectives: 1)To compare the effectiveness of plain bupivacaine with bupivacaine plus fentanyl for post -operative analgesia among the two groups. 2)To compare the adverse effects among both the groups. Materials and Methods: 154 patients undergoing elective cesarean section under spinal anaesthesia were randomly allocated to two equal groups; Group B patients received 10 mg (2 mL) of 0.5% hyperbaric bupivacaine and Group B + F received 9mg (1.8mL) of 0.5% hyperbaric bupivacaine plus 10 ug (0.2 mL) preservative free fentanyl. The clinical profile of subarachnoid block in two groups, duration of effective analgesia and its effect on maternal and neonatal outcome was studied. Results: The duration of effective analgesia was significantly more in Group B +F (225.03+2.81)mins compared to Group B (119.90+2.76)mins. The incidence of side effects was less in Group B + F than Group B. Conclusion: We can conclude that the addition of fentanyl to 0.5% hyperbaric bupivacaine for spinal anaesthesia in cesarean section provides effective and prolonged post-operative analgesia with less side effects.

Sphenopalatine Ganglion versus Greater Occipital Nerve Blocks in Treating Post-Dural Puncture Headache after Spinal Anesthesia for Cesarean Section: A Randomized Clinical Trial

Despite being invasive, with serious complications, epidural blood patch (EBP) is still considered the gold standard therapy for Post Dural Puncture Headache (PDPH). The use of Peripheral nerve blocks for PDPH are studied here. To investigate the efficacy of sphenopalatine ganglion block (SPGB) and greater occipital nerve block (GONB) to relieve PDPH and its associated symptoms. Randomized comparative single-blind trial. A University hospital. Patients who received spinal anesthesia for elective cesarean section, and then developed PDPH during hospitalization or within 5 days after dural puncture were enrolled to receive GONB (n = 47) or SPGB (n = 46) for treatment of PDPH. GONB Group: Patients received bilateral GONB using 3 mL mixture of 2 mL lidocaine 2% plus 1 mL dexamethasone 4 mg on each side of occipital region. SPGB Group: Patients received bilateral SPGB using the same mixture in each nostril. Assessments included Numeric Rating Scale (NRS) for severity of headache at supine and sitting positions, nausea NRS, neck stiffness, need for EBP, and complications. The supine and sitting headache NRS scores significantly decreased at 30 minutes after blocks and throughout follow-up period in both groups (P < 0.000). Clinically significant drop of NRS to < 4 was reached earlier in GONB group. There was a significant difference between groups after 2 hours in supine and sitting headache NRS scores (P = 0.020 and 0.030, respectively); however, both treatments showed similar effectiveness from the third hour afterwards (P > 0.05). Both techniques were effective in relieving neck stiffness and nausea (P < 0.000), with no adverse effects. A limitation to this study was the small sample size. GONB and SPGB are equally effective in relieving symptoms of PDPH. Both techniques are safe, simple, and less invasive than EBP.

Pre-delivery hypotension after spinal anesthesia during cesarean section and its associated factors at Jigme Dorji Wangchuck National Referral Hospital, Bhutan

Introduction: The current choice of anesthesia for the cesarean section is spinal anesthesia. However, hypotension is the major complication. If promptly not recognized and treated, it increases the morbidity and mortality of the mother and fetus. This study was conducted to evaluate the rate of pre-delivery hypotension and risk factors following spinal anesthesia for cesarean section at the National Referral Hospital in Bhutan. Methods: A cohort study was conducted from 1st October 2018 to 30th June 2019 on 350 women undergoing cesarean section under spinal anesthesia. Pre-delivery hypotension was defined as systolic blood pressure &lt; 100 mm Hg. The association of factors for hypotension was tested using multivariable binary logistic regression using a forward stepwise model. A p-value &lt; 0.05 was considered significant. Results: The rate of pre-delivery hypotension was 74.6 % (n=261). History of hypertension during pregnancy (Adjusted OR 0.25, [0.11-0.60], p=0.013), prophylaxis use of ephedrine (Adjusted OR 0.45, [0.22-0.92], p= 0.024) and ondansetron (Adjusted OR 0.43, [0.22-0.82], p= 0.010),longer preoperative fasting duration (Adjusted OR 1.12, [1.01-1.21], p=0.024,), sensory block level &lt;= T4 (Adjusted OR 3.4, [1.8-6.4], p=&lt;0.001) and baseline systolic blood pressure less than or equal to 120 mmHg (Adjusted OR 2.8, [1.5-5.1], p=0.001) were significant risk factors. Conclusions: This study conduces that the rate of pre-delivery hypotension following spinal anesthesia in a cesarean section was high among women undergoing cesarean section. It is alarming as around two-third of women and fetus undergoing cesarean section under spinal anesthesia are at risk of consequences of hypotension. Most of the risk factors in the study are modifiable. The study suggests that if the anesthesia provider intervenes in managing the modifiable risk factors and treat hypotension promptly, it can help reduce the risk of women and fetus to spinal hypotension consequences.

P.133 Spinal anaesthesia for caesarean section in a patient with undifferentiated intracranial lesion: importance of risk stratification in optimised management

P.133 Spinal anaesthesia for caesarean section in a patient with undifferentiated intracranial lesion: importance of risk stratification in optimised management

Comparative Study between Two Doses of Intravenous Ondansetron on Maternal Haemodynamics during Elective Caesarean Delivery under Spinal Anaesthesia

Abstract Background: Hypotension is one of the most common intra-operative complications associated with spinal anaesthe-sia. Its incidence in caesarean section has been estimated to be as high as 50-60%. Despite fluid preloading, lateral uterine displacement and the use of vasopressor agents. It occurs due to sympathetic block which leads to autonomic nervous system disturbances and a decrease in systemic vascular resistance. This can occur because the level of block must be at least at T4 to ensure adequate analgesia severe hypotension following spinal anaesthesia in caesarean section is a dangerous com-plication. If it is unnoticed or inadequately treated, it can lead to serious maternal or fetal compromise. Aim of Study: To evaluate the effect of two doses of prophylactic ondansetron on spinal anesthesia-induced hypo-tension and bradycardia among patients undergoing elective cesarean deliveries. Patients and Methods: This study was carried out in Ain Shams Hospital Obstetric Theatres from March 2020 to September 2020. Written informed consent was obtained from every parturient included in the study. Ethical approval for this study was provided by the Ethics Committee of Faculty of Medicine, Ain Shams University. FAMSU MS 155/2020 (FWA 000017585) 23/2/2020. Results: In our study, there is statistically significant difference between the studied groups regarding dose of vasopressor use. About 53.3% and 46.7% of those within ondansteron 4mg group received 10 and 12.5mg respectively. About 51.1% and 48.9% of those within ondansteron 8mg group received 12 and 15mg respectively. In terms of side effects, no patient within either group developed shivering, vomiting or bradycardia. Regarding nausea, there is statistically non-significant difference between the studied groups regarding occurrence of nausea. Conclusion: Prophylactic bolus of intravenous onandsetron 8mg and to a lesser extent 4mg could decrease the fall in the MBP of parturients following spinal anesthesia as well as ephedrine needed dose that could decrease neonatal acidosis associated with ephedrine use.

Effects of colloid preload on the incidence of hypotension in spinal anesthesia for cesarean section: a systematic review and meta-analysis.

Background:Hypotension is a common complication caused by spinal anesthesia (SA), which may have adverse impacts on the condition of the parturient and fetus. Liquid infusion was found to be relatively effective for reducing the incidence of hypotension. However, the question of whether colloid preload can optimize hemodynamic variables in the cesarean section remains controversial. This study aims to determine the effects of colloid preload on the incidence of hypotension induced by SA in elective cesarean section.Methods:Related keywords were searched on PubMed, EMBASE, and Cochrane Library from inception dates to May 2020. Studies included were evaluated for eligibility and quality. The primary outcome was the intra-operative incidence of hypotension and severe hypotension. The secondary outcomes included the lowest intra-operative systolic blood pressure, the maximal intra-operative heart rate, the intra-operative needs of ephedrine and phenylephrine, the incidence of maternal nausea and/or vomiting, and neonatal outcomes (umbilical artery pH and Apgar scores). Apart from the above, RevMan 5.3 was used for the data analysis.Results:Altogether nine randomized controlled trials were included in the meta-analysis. There were no significant differences in the incidence of intra-operative hypotension, severe hypotension, or neonatal outcomes between the colloid preload group and control group, except for the umbilical artery pH.Conclusion:This meta-analysis suggests that colloid preload does not significantly reduce the incidence of hypotension associated with SA in elective cesarean section.

Changes of cerebral oxygenation indices measured by near infrared time-resolved spectroscopy during spinal anesthesia for cesarean section: Simultaneous measurement with cerebral blood flow.

To measure the changes in cerebral oxygenation indices by near infrared time-resolved spectroscopy and the cerebral blood flow simultaneously after spinal anesthesia for cesarean section. This prospective observational study was conducted for 25 pregnant women scheduled for elective cesarean section under spinal anesthesia. During a period of 15 min after spinal anesthesia, cerebral oxygenation (ScO2 ), and the total cerebral hemoglobin concentration (tHb) were measured using near infrared time-resolved spectroscopy and mean cerebral blood flow velocity (Vm) was measured using transcranial Doppler ultrasonography. Next, in the women who had nausea during the observed period, we compared these values when nausea was detected with those when it was not. Mean arterial pressure (MAP) decreased to around 60 mmHg (by 25% compared to the control) 6min after spinal anesthesia. Compared to the control, ScO2 decreased by about 3% after 6min and then gradually increased. The tHb, which reflects cerebral blood volume started to decrease just after spinal anesthesia and this continued until 12 min (the decrease was about 12%). Vm decreased by about 7%. In the 14 women who had nausea, MAP, Vm, and ScO2 values when nausea was detected were significantly lower than when it was not. The changes in cerebral hemodynamics may be small after spinal anesthesia in ordinary cesarean section compared to the reduction of systemic arterial blood pressure. There might be greater decreases in cerebral blood flow and oxygenation when nausea occurred in the pregnant women who experienced it after spinal anesthesia.

Effect of vitamin C on the incidence and severity of postdural puncture headache in patients undergoing cesarean section with spinal anesthesia

Background: Some studies have shown that vitamin C has a positive effect on reducing headaches after spinal anesthesia, but studies in this field are inadequate. The aim of this study was to determine the effect of vitamin C infusion on the decrease of headache after spinal anesthesia in cesarean section. Methods: This clinical trial study was performed on 160 patients undergoing cesarean section referred to Kowsar Hospital of Yazd in 2017. The patients were randomly divided into two groups including group 1, 2 gr of vitamin C in 500 cc normal saline, and group 2, 500 cc of normal saline was injected preoperatively. The two groups were compared for headache incidence. Results: At the time of recovery, 2 hours later, the frequency of headache in the intervention group was significantly lower than the control group (P &lt;0.05). But there was no significant difference between the two groups regarding headache at 4, 6, 12, 24, and 48 hours postoperatively (P&gt;0.05). Conclusion: Considering the patient's condition, and according to the anesthesiologist and surgeon, vitamin C can be used to reduce pain in patients undergoing cesarean section with spinal anesthesia.

An advanced double intravenous vasopressor automated system to treat hypotension during spinal anaesthesia for caesarean section: A pilot study.

During spinal anaesthesia for caesarean section, haemodynamic instability may lead to maternal and foetal complications. We developed a novel advanced double intravenous vasopressor automated system (ADIVA) by using a continuous blood pressure and heart rate monitor. Treatment of hypotension was based on three criteria: the drug (phenylephrine or ephedrine) according to the heart rate; the dose of vasopressor determined by the degree of hypotension; a fast or slow bolus of vasopressor administered depending on whether there was a negative or positive gradient of SBP changes, respectively. The aim of this pilot study was to investigate the feasibility of the ADIVA algorithm. A prospective pilot study. Single obstetrics and gynaecology centre in Singapore. Women undergoing elective caesarean delivery under spinal anaesthesia. Automated administration of ephedrine or phenylephrine based on changes in blood pressure and heart rate (via the ADIVA algorithm) detected on continuous noninvasive haemodynamic monitoring using noninvasive continuous haemodynamic monitor (Nexfin). The primary outcome was the incidence of hypotension, defined as SBP less than 80% of baseline. The secondary outcome measures were reactive hypertension, total vasopressor requirement, maternal and neonatal outcomes and system performance. Forty-five women were recruited. Thirty-one women (69.9%) had at least one reading of hypotension. SBP was within ±20% of the baseline in a mean ± SD of 79.7 ± 17.6% of measurements. Forty-four (97.8%) women required phenylephrine before delivery, while 15 (33.3%) required ephedrine. No rescue medications were required. Three women (6.7%) had nausea and two (4.4%) vomiting. All neonates had APGAR scores of 9 at 5 min. The ADIVA system, with noninvasive continuous haemodynamic monitoring, was able to maintain maternal SBP within ±20% of baseline for the vast majority of the measurements. This system had good maternal and foetal outcomes with minimal intervention from the attending anaesthetist. NCT03620942.

Spinal Anesthesia for Cesarean Section in a Coagulated Patient with Antiphospholipid Syndrome

Abstract Antiphospholipid syndrome (APS) is a systemic autoimmune disease characterized by vascular thrombosis or pregnancy complications with the presence of antiphospholipid antibodies. It is a rare disease affecting 40–50/100,000 population yet responsible for 10%–15% of recurrent pregnancy loss. Diagnosis requires at least one clinical and one laboratory criteria to be met. Perioperative management in obstetric APS underwent cesarean section stressed on the management of anticoagulation and proper choice of anesthesia technique. We report the case of a 21-years-old woman, 39 weeks pregnant, diagnosed with APS since the 8th week of gestation. She had two previous miscarriages and an elevated level of anticardiolipin antibody (aCL IgG: 21 GPL U/ml) with normal aCL IgM and lupus anticoagulant. She was treated with a prophylactic dose of low-molecular-weight heparin (0.4 IU subcutaneous enoxaparin) and oral aspirin 80 mg daily. She presented to the obstetric department and scheduled for an urgent cesarean section. Enoxaparin was held, and the surgery was done with spinal anesthesia. Anticoagulation resumed 12 h after surgery. No complications on the mother and baby were found after 3 days of observation.