Paracervical block in incomplete abortion using manual vacuum aspiration: randomized clinical trial. Comparison of paracervical block techniques during first trimester pregnancy termination. Pain relief using paracervical block in patients undergoing manual vacuum aspiration of uterus. Randomized controlled trial of mefenamic acid vs paracervical block for relief of pain for outpatient uterine curettage. Paracervical block efficacy in office hysteroscopic sterilization: a randomized controlled trial. Paracervical block with and without conscious sedation: a comparison of the pain levels during egg collection and the postoperative side effects. A randomized comparison of different methods of analgesia in abortion using manual vacuum aspiration. Feasibility and pain control in outpatient hysteroscopy in postmenopausal women: a randomized trial. Double-blind randomized comparison of xylocaine and saline in paracervical block for diagnostic fractional curettage.
To estimate the effectiveness of paracervical block in controlling pain among women treated with manual vacuum aspiration for an incomplete abortion
                A randomized clinical trial was conducted at Nuestra Señora de Altagracia, a maternal and perinatal referral hospital in the Dominican Republic. The sample size was based on a clinical difference of 1.5 points in the level of pain measured with the visual analog scale using 90% power and a sampling error of 0.04. Women who were at 12 weeks of gestation or less with an incomplete abortion were eligible to participate. They were randomly assigned to receive either the standard treatment of care (manual vacuum aspiration for uterine evacuation with psychological support but no paracervical block) or manual vacuum aspiration treatment with psychological support and paracervical block using 1.0% lidocaine. Patients with active infections, severe illnesses, psychiatric disorders, or allergies to lidocaine were excluded. Intraoperative pain as reported by the women and as documented by an external observer was measured.
                Although the paracervical block technique used showed a slight reduction in severe pain, there were no clinically or statistically significant differences in intraoperative pain between the 2 groups (relative risk 0.73; 95% confidence interval 0.43, 1.23) with 50% of all patients registering 7 or higher score on a visual analog pain scale of 0-10. However, statistically significant differences were found in each group when comparing the level of preoperative and intraoperative pain described by the patient (P <.001). The manual vacuum aspiration technique and the paracervical block were not accompanied by complications.
                The paracervical block technique used in this study along with psychological support was comparable with pain control using psychological support alone; neither pain management regimen provided sufficient pain control. It is recommended that randomized comparative studies be designed to determine the effectiveness of other paracervical block techniques and the efficacy of the use of analgesics in patients suffering from incomplete abortion treated with manual vacuum aspiration. To determine whether variations in chloroprocaine placement in paracervical blocks influence effectiveness, whether chloroprocaine is superior to saline, and what factors influence pain perception.
                Eighty-two women undergoing first trimester aspiration abortions were randomized to receive 1% chloroprocaine or saline at 3-5-7-9 or 4-8 o'clock positions. Using a 0--10 scale, women rated anxiety, dysmenorrhea, and pain associated with laminaria insertion, paracervical block, and aspiration.
                All four groups were similar in medical and demographic characteristics. Injection position did not influence pain ratings, but women who received chloroprocaine had less pain than those who received saline (6.3+/-2.3 vs. 7.8+/-2.0, P=0.002). Paracervical pain and dysmenorrhea were independently associated with aspiration pain scores (respective regression coefficients 0.49 and 0.26, P<0.008).
                There is no advantage to using a four-site paracervical block over a two-site technique, but chloroprocaine is superior to saline. Paracervical block may not provide adequate anesthesia during first trimester abortion, especially for women with significant dysmenorrhea. To evaluate pain relief using paracervical nerve block with 1% lignocaine injection in patients undergoing uterine evacuation by Manual Vacuum Aspiration (MVA) for the treatment of incomplete abortion.
                A randomized double blind clinical trial.
                Marie Stopes Health Centre, Nairobi.
                One hundred and forty two patients were recruited between September and October 1997. The intervention was random assignment to the study group (paracervical block with 1% lignocaine) or the placebo group (paracervical block with sterile water for injection). Intra and post operative assessment of pain was made using McGills and facial expression scales.
                The untreated group experienced significantly more pain than the treated group, especially lower abdominal pain and backache. The pain was especially marked intraoperatively, less so 30 minutes post-operatively.
                Based on the findings of this study, any patient going for manual vacuum aspiration for the treatment of incomplete abortion should be given Paracervical block as it is cost effective, easy to perform and with less side effects. To compare the efficacy of mefenamic acid vs paracervical block for pain relief during and after fractional curettage.
                Between January 1 and July 31, 2002, the authors enrolled 87 patients with abnormal uterine bleeding, who requested fractional curettage at the Outpatient Gynecologic Clinic, Srinagarind Hospital, Khon Kaen University. A simple randomization procedure was used to distribute the patients into a control group comprising 44 patients given a paracervical block and a treatment group comprising 43 patients given mefenamic acid (500 mg) 2 hours before starting the procedure.
                Pain was scored using a visual analogue scale (VAS range, 0 to 10).
                The median pain scores of the treatment types during endocervical, endometrial, immediately after, and 30 minutes after, fractional curettage were 2.5 vs 3.0 (p = 0.42), 6.5 vs 7.5 (p = 0.19), 4.0 vs 3.5 (p = 0.20) and 1.5 vs 1.0 (p = 0.17), respectively. The rate of complications was 6.8% (3 in 44) in the paracervical lignocaine injection group.
                The efficacy of pain relief for fractional curettage using oral mefenamic acid (500 mg) two hours before the procedure was not statistically different from the paracervical block, but there were fewer side effects. Mefenamic acid should be considered an alternate pain relief during fractional curettage. To estimate the efficacy of paracervical block compared with saline for pain relief during office hysteroscopic sterilization.
                This study was a randomized, placebo-controlled study of women desiring hysteroscopic sterilization. A paracervical block of 1% lidocaine or normal saline was administered before office hysteroscopic sterilization. Patients and investigators were blinded to assignments. A pre hoc power analysis determined that 40 women would be required per arm to detect a difference of 0.9 cm on a visual analog scale. Pain was recorded on a visual analog scale at multiple procedure time points. Individualized standardized pain scores were constructed by weighted reporting of objective and subjective sensation.
                A total of 103 consecutive women were eligible, and 80 women were randomized, with 40 per group. Thirty-seven (93%) in each group had successful placement. The lidocaine group showed significantly lower pain scores for tenaculum placement (mean+/-standard deviation: 0.97+/-1.28 compared with 3.00+/-2.41, P<.001) traversing the external cervical os (1.46+/-1.71 compared with 3.77+/-2.68, P<.001) and internal os (1.79+/-2.11 compared with 4.10+/-2.77, P<.001). There was no significant observed difference with device placement in tubal ostium (3.15+/-2.69 compared with 3.74+/-2.73, P=.33). Multivariable linear regression analysis demonstrated a relationship of pain to procedural time (P=.047) and to group assignment (P<.01).
                Paracervical block with 1% lidocaine provides effective pain relief for cervical manipulations during office hysteroscopic sterilization, but does not reduce the pain associated with upper uterine/tubal manipulation when placing the devices.
                ClinicalTrials.gov, www.clinicaltrials.gov, NCT00811187.
                I. To compare the pain levels during egg collection and the subsequent postoperative side effects in patients receiving a paracervical block (PCB) with and without conscious sedation.
                A prospective, randomized, double-blind, and placebo-controlled study.
                A tertiary assisted reproduction unit.
                150 patients undergoing egg collection.
                Randomized to receive PCB only (control group) and PCB in conjunction with conscious sedation (sedation group).
                Vaginal and abdominal pain levels; severity of postoperative side effects.
                The median pain levels during vaginal punctures were 12.0 (2.5th--97.5th centiles: 0--84.3) and 30.0 (2.5th--97.5th centiles: 0--100) in the sedation and placebo groups, respectively. The corresponding median abdominal pain levels were 16.5 (2.5th--97.5th centiles: 0--100) and 43.0 (2.5th--97.5th centiles: 0--100). The pain levels were significantly higher in the placebo group than the sedation group. There were no significant differences between the two groups in the severity of nausea, vomiting, dizziness, and drowsiness.
                Patients who received only a PCB during the egg collection experienced 2.5 times higher levels of vaginal and abdominal pain as compared to those who received both PCB and conscious sedation. The use of PCB along is not recommended for all patients but it may be considered with selected patients after they have been given extensive counseling. To estimate the effectiveness of different methods of analgesia among women treated with manual vacuum aspiration for spontaneous abortion.
                The 113 patients diagnosed with incomplete abortion and considered candidates for manual vacuum aspiration were randomly assigned to 3 groups of analgesic administration: diclofenac plus paracervical block; meperidine plus diclofenac; and meperidine alone. Pain levels were evaluated using the Wong Scale of Pain.
                The mean pain scores for the three groups were: diclofenac and paracervical block 5.4; meperidine plus diclofenac 5.0; meperidine 5.7 (P=0.57). Analysis of pain using the levels mild (0-3), moderate (4-6), and severe (7-10) showed no statistical significance among the 3 groups of analgesics. Adverse effects were more common in the groups using analgesia containing meperidine.
                There was no significant difference between the analgesics used among the 3 groups. Most of the patients, regardless of the analgesic used, reported moderate pain. Three methods of diagnostic hysteroscopy have been tested for both women's compliance and feasibility of procedures in postmenopause.
                Three hundred and sixty-two postmenopausal women were enrolled in a three-arm study: 5 mm diagnostic sheath (Group 1, 119 women), 5 mm sheath with paracervical block (Group 2, 121 women), and 3.5 mm sheath (Group 3, 121 women). CO2 was the distention medium. Both feasibility of hysteroscopy (procedures failed due to stenosis or incomplete distention of cavity) and discomfort of women have been recorded. Pain perception has been measured on a visual numerical rating scale. Statistical analysis was performed by t-test for unpaired samples and chi-square test.
                Paracervical block was per se painful in 18.2% and bleeding from injection site occurred in 38.8%. Hysteroscopy failure due to stenosis occurred in 9%, 10% and 0.4% of the three groups respectively (p<0.01). Intolerable pain was reported by 17% of women in Group 1, 6% in Group 2 (p<0.05) and in none of Group 3 (p<0.01). Pain score improved from Group 1 to Group 3 (p<0.01). Hysteroscopy was incomplete because of gas leakage in 1.7% of both Group 1 and 2 and in 13.2% of Group 3 (p<0.01).
                Pain perception in postmenopausal women was reduced when paracervical block was used, but discomfort was even less with the narrow sheath hysteroscope. The narrow sheath will expose to a high percentage of inconclusive procedures but it can be overcome by changing to the large sheath hysteroscope without affecting patient pain perception. Comparative study of the level of the reported pain between patients who received xylocaine and normal saline for paracervical block during fractional curettage was carried out in 70 patients in a double blind randomized controlled trial. One group of patients received xylocaine for paracervical block just before the procedure was performed while the other group received normal saline in the same manner. Self-reported pain intensity using visual analog scale was assessed at four time points including the first time point when Allis tissue forceps was applied on the cervix, the second and third time points when curettage was done on the endocervix and in the endometrial cavity respectively. The last time point was evaluated at 30 minutes after the procedure. The results of the study revealed pain occurring in patients in the normal saline group was more severe than those in the xylocaine group with statistically significant difference at the second time point (visual analog scale 4.80 +/- 2.7 in the normal saline group compared to 3.20 +/- 2.4 in the xylocaine group, p < 0.05) and third time point (visual analog scale 8.17 +/- 2.0 in the normal saline group compared to 4.94 +/- 3.1 in the xylocaine group, p < 0.05 ). On the contrary, pain occurring in patients in the normal saline group and xylocaine group was not statistically significantly different at the first time point (visual analog scale 3.62 +/- 2.7 in the normal saline group compared to 3.97 +/- 2.8 in the xylocaine group, p > 0.05) and the fourth time point (visual analog scale 1.34 +/- 2.0 in the normal saline group compared to 1.57 +/- 2.6 in the xylocaine group, p > 0.05). Before this study, there was an idea that normal saline solution could be considered for the paracervical injection solution. The explanation for this was the local anesthetic mechanism may be from distension of nerve capsules rather than blockage of specific autonomic nerves. However, this study showed that nerve capsule distension is not the only factor for pain control in paracervical block. An analgesic agent is still an important factor.
No technique provided reliable pain control in the 17 included studies. Some studies reported that women experienced severe pain (mean scores of 7 to 9 out of 10) during uterine intervention, irrespective of the analgesic technique used. We concluded that the available evidence fails to show whether paracervical block is inferior, equivalent or superior to alternative analgesic techniques, in terms of efficacy and safety, for women undergoing uterine interventions.