Objective: To study the efficacy of ginger on the Nausea and Vomiting during and after Cesarean Section under Spinal Anesthesia. Study Design: Double blind randomized controlled trial. Setting: Department of Obstetrics and Gynecology, Ahvaz University, Razi Hospital. Material and Method: From January 2008 to April 2008, 70 pregnant women underwent for elective cesarean section under spinal anesthesia were randomized received coded drug one hour prior section with 30 ml water. The patients were at term, single pregnancy, uterine and abdominal incision transversal, and spinal anesthesia with lidocain 5%. Patients were matched in two groups by these factors: age, height, weight, BMI, cause of cesarean section, gestational age, hypotention during and after cesarean section, duration of operation and nausea and vomiting in pregnancy. All patients were assessed for severity of nausea by visual analog nausea score (VANS). Frequency of vomiting and need antiemetic drug were evaluated during and 0/5, 1, 2, 4, 6 hours after cesarean section. Results: The results demonstrated the statistically significant differences in severity of nausea and vomiting during cesarean section (p = 0/000). Severity of nausea (p = 0/000) and vomiting (0/046) after cesarean section also was lower in ginger group than placebo group. There were statistically significant differences between two groups for need antiemetic drug during (0/000) and after (0/003) cesarean section. This need was lower in ginger group than placebo group. Side effects caused by ginger were not detected. Conclusion: Ginger has efficacy in decrease severity of nausea and vomiting during and after cesarean section under spinal anesthesia.
More than 23 million surgical procedures are performed annually [
Granger writes that galanolactone antagonists, 5-hydroxytryptamine-3 receptors and serotonin-3 in ginger may explain antiemetic properties and increased gastrointestinal motility [
This study was conducted considering the importance of controlling nausea during and after cesarean section because of the mentioned risks and establishing an immediate emotional bond between mother and baby and initiating breastfeeding.
This study was a double-blind clinical trial conducted in Razi Hospital, Ahvaz (Iran). Of the pregnant women presenting to the hospital for elective cesarean delivery, 70 qualified women with a history of one to three pregnancies, aged between 18 and 35 years and the full-term gestational age were selected (94 women were entered into the research according to Cochran formula and finally 70 women were selected). Pregnant women did not have any gastrointestinal diseases, motion sickness, nausea and vomiting in previous anesthesia experiences, morbid obesity and a history of hyperemesis gravidarum, a history of nausea and vomiting during the 24 hours before surgery, underlying diseases or complications of pregnancy such as pregnancy hypertension. Before surgery, patients received similar training about the use of visual analog scale for nausea and one hour before surgery, the subjects received coded capsules with 30 cc of water. Ginger capsules were manufactured by Goldaru Company and each capsule contained 250 mg of ginger root powder approved by a pharmacognosy expert and placebo capsules contained rice flour. These patients did not receive any medication before surgery.
Patients were hydrated with 500 cc of Ringer’s solution in the operating room, and then an anesthetist performed spinal anesthesia with the injection of 50 - 100 mg lidocaine (5%) in L3-4 or L4-5 space using 24 - 25 gaugeneedle. If systolic blood pressure dropped more than 20% as compared with the initial pressure or less than 100 mmHg, routine treatments were performed including glowering the head of the bed, increasing Ringer’s solution infusion rate or injecting 5 - 10 mg intravenous ephedrine. Patients’ blood pressure was monitored every minute until it became normal and all women received 5 liters per minute of oxygen until the birth. After the birth of the baby, 40 units of syntocinon was intravenously infused. After the surgery, women were transferred to the recovery room and then to the gynecology ward after their foot sensation was restored and their vital signs and complications were stabilized. The researcher recorded women’s nausea and vomiting status and antiemetic medications received during surgery and 0.5, 1, 2, 6, 4 hours after the end of surgery.
Visual analog scale, a 100-mm line with specific beginning, end and range, was used to assess nausea severity, as patients marked their status on it from zero to represent the best situation and the absence of the target complication to 100 to represent the worst situation. This scale was used in several studies on quality of life and its reliability was determined from 40% to 95% [
The number of retching or vomiting was also used to assess nausea severity, which was rated severe, moderate and severe if retching or vomiting occurred more than 5 times, between 3 and 5 times and fewer than 3 times, respectively [
If patients could tolerate nausea, they did not receive any medication, but in case nausea was intolerable, or retching or vomiting occurred, they received 10 mg metoclopramide. It should be noted that all women were transferred in a similar way to the gynecology ward on a stretcher in order to remove the effects of patients’ movement on nausea and vomiting. Patients received 2 g of cefazolin simultaneous with baby’s shoulder delivery and postoperative antibiotics was 1 g IV infusion of cefazolin as according to the gynecology ward routine. The data obtained were analyzed in SPSS-15 software using t-test, chi-square, and descriptive statistics to determine the frequency and the percentage of data obtained. The significance level was set as p < 0.05.
Data from the two study groups, including age, weight, height, BMI, gestational age, duration of surgery, duration of preoperative fasting, the ephedrine used during and after surgery using t-test are presented in
The highest frequency of nausea severity during surgery was moderate nausea of 11 women (31.4%) in the trial group and severe nausea of 18 women (51.4%) in the control. The difference in nausea severity experienced during surgery was reported significant between the two groups by t-test (p = 0.0001) (
Seven women (20%) in the trial group and 22 women (62.9%) in the control group vomited during surgery and the Chi-square test reported a significant difference between the two groups in this regard (p = 0.0001).
The following results were obtained on the severity of vomiting during surgery: the most frequent vomiting severity during surgery was mild vomiting of six women (17.1%) in the trial group, but moderate vomiting of 11 women (31.4%) in the control group. The difference in the mean frequency of vomiting between the two groups was reported significant by t-test (p = 0.0001) (
The need for metoclopramide during surgery was reported significant by the chi-square test between the groups (p = 0.0001). The amount was 22.9% (n = 8) in the ginger group and 77.1% (n = 27) in the placebo group.
The results on the control of nausea 6 hours after surgery showed that the overall distribution of nausea between the two groups in different hours after surgery was not statistically significant by the Mantel-Haenszel chi-square test (p = 0.07). Repeated-measures analysis of variance showed that the mean severity of postoperative nausea was significantly different between the two groups (p = 0.0001), and the difference was significant by t-test in half an hour (p = 0.0001) and one hour (p = 0.02) after surgery (
The following results were obtained on the control of vomiting 6 hours after surgery: the overall distribution of vomiting between the two groups in different hours after surgery was statistically significant by the Mantel- Haenszel chi-square test (p = 0.026). Repeated-measures analysis of variance showed that the mean severity of postoperative vomiting was statistically significant between the two groups (p = 0.046), and the difference was significant by t-test in half an hour after surgery (p = 0.02) (
Variables | Ginger group (n = 35) (mean ± SD) | Control group (n = 35) (mean ± SD) | p value |
---|---|---|---|
Age (year) | 25 ± 3.6 | 24.8 ± 3.4 | 0.775 |
Weight (kg) | 79.1 ± 11.6 | 74 ± 10.7 | 0.061 |
Height (cm) | 164.9 ± 6.1 | 164.9 ± 6.1 | 0.969 |
BMI (kg/m2) | 29 ± 4.1 | 24.7 ± 3.4 | 0.075 |
Gestational age (week) | 39 ± 0.5 | 39.2 ± 0.5 | 0.105 |
Duration of surgery (min) | 45.8 ± 5 | 46.2 ± 5.2 | 0.773 |
Ephedrine used during surgery (mg) | 13 ± 8.7 | 14.1 ± 7.1 | 0.551 |
Ephedrine used after surgery (mg) | 2.8 ± 1.4 | 2.9 ± 1.8 | 0.542 |
Duration of fasting | 8.6 ± 0.4 | 8.5 ± 0.4 | 0.296 |
Variables | Ginger group (n = 35) (mean ± SD) | Control group (n = 35) (mean ± SD) | p value |
---|---|---|---|
Nausea severity during surgery | 2.8 ± 2.8 | 6.3 ± 3.4 | 0.000 |
Nausea severity half an hour after surgery | 1.3 ± 0.6 | 3.1 ± 3 | 0.000 |
Nausea severity 0.5 - 1 hour after surgery | 1.1 ± 0.5 | 1.8 ± 1.3 | 0.27 |
Nausea severity 1 - 2 hour after surgery | 1.2 ± 0.4 | 1.6 ± 0.58 | 0.261 |
Nausea severity 2 - 4 hour after surgery | 0.7 ± 0.2 | 0.8 ± 0.2 | 0.882 |
Nausea severity 4 - 6 hour after surgery | 1.6 ± 0.03 | - | 0.321 |
Variables | Ginger group (n = 35) (mean ± SD) | Control group (n = 35) (mean ± SD) | p value |
---|---|---|---|
Vomiting severity during surgery | 1 ± 0.5 | 2.7 ± 2.7 | 0.000 |
Vomiting severity half an hour after surgery | 0.6 ± 0.3 | 1.6 ± 0.7 | 0.022 |
Vomiting severity 0.5 - 1 hour after surgery | - | 0.3 ± 0.06 | 0.321 |
Vomiting severity 1 - 2 hour after surgery | - | 0.3 ± 0.06 | 0.321 |
Vomiting severity 2 - 4 hour after surgery | - | - | - |
Vomiting severity 4 - 6 hour after surgery | - | - | - |
The need for anti-emetic medication after surgery was reported significant by the chi-square test. Ten women (28.6%) in the control group versus 2 women (5.7%) in the test group needed metoclopramide (p = 0.011).
This study aimed to evaluate the effect of ginger capsule on nausea and vomiting during and after caesarean section under spinal anesthesia. There is a high prevalence of nausea and vomiting during and after caesarean section, and although metoclopramide is the most common medication used to control or prevent this complication; its occasional extrapyramidal complications are always a concern for its administration [
Since reduced blood pressure can cause ischemia of the brain stem and stimulate vomiting center in the brain stem and also hypotension during and after surgery can lead to bowel ischemia and release of nausea-causing substances such as serotonin [
As the results showed, ginger led to a decrease in the incidence and severity of nausea and vomiting during and after cesarean section and also the need for anti-emetic medication.
The incidence of nausea during surgery in the placebo group was 80%, Pan (1992) reported the prevalence of nausea during cesarean section 66% [
Tongta et al. (2006) concluded that ginger reduced nausea and vomiting after surgery. It also reduced the need for anti-emetic medication which is roughly consistent with the present study. Tongta also concluded that the mean severity of postoperative nausea in the hours he investigated (immediately, two and six hours after surgery) was less in the ginger group than in the placebo group. But nausea severity two and six hours after surgery was statistically significant [
In the present study, mean severity of postoperative nausea in the hours investigated (half, one, two and four hours after surgery) was less in the ginger group than in the placebo group. But it was statistically significant half and one hour after surgery. It seems that this significant difference in the hours after surgery is due to the type of anesthesia, type of surgery, and duration of surgery. In his study, the type of anesthesia was general anesthesia and the type of surgery was hysterectomy and other gynecology procedures and the average duration of surgery was 127.08 minutes.
Sirrirat et al. (2006) also concluded that ginger is effective in preventing postoperative nausea in gynecology surgeries and in preventing postoperative vomiting is nearly significant. In their study, the mean severity of postoperative nausea two and six hours after surgery was less in the ginger group than in the placebo group. But it was statistically significant six hours after surgery [
Phillips et al. (1992) in their study to determine the effect of ginger with metoclopramide in reducing nausea and vomiting after gynecology surgeries in 120 patients concluded that the antiemetic effect of ginger was significant compared to placebo and also the incidence of postoperative nausea and vomiting was 21%, 27% and 41% in the ginger group, the metoclopramide group and the placebo group respectively. Phillips concluded that the effect of one gram of ginger is equivalent to 10 mg metoclopramide [
Grainger writes that galanolactone antagonists, 5-hydroxytryptamine-3 receptors and serotonin-3 in ginger may explainits antiemetic properties and increased gastrointestinal motility [
Bone et al. (1990) compared the antiemetic effect of ginger with placebo and metoclopramide on postoperative nausea and vomiting and found that the postoperative nausea and vomiting was less in patients who received ginger or metoclopramide compared to patients who received placebo. The frequency of vomiting in groups that had received ginger or metoclopramide was less than that in the placebo group. The need for metoclopramide was also reduced in patients [
Nonetheless, Visalyputra (1998) suggested that ginger powder at a dose of 2 g and droperidol at a dose of 1.25 mg, or both were ineffective in reducing nausea and vomiting after laparoscopy [
Given that 93% of anesthetists believe nausea and vomiting are intractable [
Ginger has efficacy in decrease severity of nausea and vomiting during and after cesarean section under spinal anesthesia.
This research is derived from the master thesis in the nursing and midwifery department of Ahvaz Medical University. We appreciate the cooperation by honorable research deputy of university and all participants in this study.
MahbobehAmouee,SiminMontazeri,Reza AkhondZadeh,MaryamGhorbani, (2016) The Effect of Ginger Capsule on Nausea and Vomiting during and after Caesarean Section under Spinal Anesthesia. International Journal of Clinical Medicine,07,106-112. doi: 10.4236/ijcm.2016.71011