Objectives: To evaluate the postoperative analgesic yield of continuous intra-articular (IA) ropivacaine/tramadol infusion as against infusion of ropivacaine alone after total knee arthroplasty. Patients and Methods: Sixty patients accompanied by arthrosis were randomly divided into three equal groups: The ropivacaine group, which obtained a continuous intraarticular (IA) infusion of ropivacaine alone; the combination group, which obtained a continuous (IA) infusion of a combination of ropivacaine and tramadol at a rate of 6 ml/h for 72 h postoperatively; and the control group, which did not receive IA medications. After release of the ischemic tourniquet and assurance of haemostasis, a vacuum drainage tube was applied. The (IA) infusion was delivered through a multipored catheter for 72 h. Postoperative pain was assessed using visual analogue pain scale (VAS), and intravenous meperidine was administered as rescue analgesia if the (VAS) pain score was greater than or equal to (4) or on patient’s request. The total rescue analgesia consumption, angle of flexion of the knee and hospital stay were recorded. Results: The ability to achieve better angle of flexion was significantly higher in the combination group compared with the other groups, with a significant difference in favour of the ropivacaine group compared with the control group. At 2 h postoperatively, the mean pain (VAS) scores were significantly lower in patients who received (IA) analgesia compared with the control group and in the ropivacaine/tramadol group versus the ropivacaine group. The number of requests and total dose of rescue analgesia consumed were significantly lower with (IA) analgesia, with a significant difference in favour of the combination group. There was significant correlation between pain (VAS) scores and angle of flexion of the knee joint. Conclusion: Continuous (IA) ropivacaine/tramadol infusion safely reduced postoperative pain and spared administration of rescue analgesics with a significantly improved range of joint movement.
Arthroplasty surgeries carry multiple concerns for both surgeons and anaesthetists. First, patients who need arthroplasty surgeries are usually geriatric patients who are handicapped or immobilized or who have been suffering from slow painful motion since years. Second, these patients mostly have additional morbidities, which may delay their postoperative recovery [
An aspect of prime importance is the immediate postoperative pain, which imposes both physical and mental burden, preventing patients from trying to move their joints and hence prolonging the duration of postoperative care and delaying rehabilitation [
Multiple analgesic modalities were proposed for management of postoperative pain in patients undergoing arthroplastic surgery. Remeand et al. [
Fu et al. [
The current controlled prospective comparative study was conducted at Departments of Anaesthesia and surgical I.C.U in Aswan and Benha University Hospital, between Sep. 2014 and May 2016. After approval of the study protocol by the Local Ethical Committee and obtaining written fully informed consent from the patient or a near relative of the patient. Sixty patients were included in this prospective, randomized, double-blind, age 65 - 80 yr, ASA physical status I-II, with primary knee arthrosis and assigned for total knee arthroplasty were enrolled in the study. Exclusion criteria were patients with chronic pain or taking chronic opioid medication, known allergy to the medications used, contraindications to performing regional anaesthesia and patients with neurological or psychological diseases that may interfere with assessment, those contraindication for the study drugs, and those with orthopaedic diseases other than knee arthrosis were excluded from the study.
Using sealed envelopes, patients were randomly divided into three equal groups (n = 20): the ropivacaine group (group R), which included patients who received continuous intra-articular infusion of ropivacaine alone; the combination group (group RT), which included patients who received continuous intra-articular infusion of a combination of ropivacaine and tramadol; and the control group (group C), which included patients who did not receive intra-articular medications and were maintained on rescue analgesia.
All surgeries were conducted under spinal anaesthesia. All patients had undergone implantation with the cemented Nex-Gen1 LPS with a patellar component (Zimmer Inc., Warsaw, Indiana, USA). After release of the ischemic tourniquet and assurance of haemostasis, a vacuum drainage tube was applied. Thereafter, a multipore catheter was inserted to ensure equal distribution of infusion fluid throughout the joint cavity.
After airtight wound closure, the vacuum drainage system was activated until complete drainage of the joint cavity was achieved, following which the system was inactivated and analgesic infusion was commenced. Dose calculation and preparation of infusions: in the ropivacaine group, 5ml of ropivacaine (7.5 mg/ml) was diluted with 5 ml saline to achieve a concentration of 3.75 mg/ml, and 5 ml of this diluted ropivacaine (18.75 mg) solution was infused for 45 min by means of a syringe pump during locking of the vacuum system, which was activated for 15 min to withdraw the infused fluid, and blood if present, out of the joint cavity; the procedure was repeated hourly for 72 h. In the combination group each tramadol ampoule containing 100 mg/2 ml was diluted with normal saline to 20 ml so that each ml contained 5 mg of tramadol. The infusion fluid was prepared from 5 ml of diluted ropivacaine (18.75 mg) and 1 ml of diluted tramadol (5 mg); this 6 ml solution was infused for 45 min by means of a syringe pump during locking of the vacuum system as in the ropivacaine group.
The analgesic infusion was commenced in the same order for the third postoperative day. Postoperative pain was assessed using a 10-point visual analogue pain scale (VAS) with 0 indicating no pain and 10 indicating the worst intolerable pain. Rescue analgesia in the form of intravenous meperidine was given if the VAS pain score was greater than or equal to 4 or on patient’s request. The daily consumption of rescue analgesia was determined. The frequency of side effects such as nausea, vomiting, constipation, and catheter site infection was recorded. The range of joint motion achieved daily was assessed as the angle of knee flexion―that is, the angle formed by the leg and the thigh. The length of hospital stay was also recorded.
The obtained data were presented as mean ± SD and ranges. Results were analysed using the Wilcoxon ranked test for unrelated data (Z-test) and the w2-test. Possible correlations were evaluated using Pearson’s correlation coefficient (r). Statistical analysis was carried out using the SPSS for Windows statistical package (Version 15, 2006; SPSS Inc., Chicago, Illinois, USA). A P-value less than 0.05 were considered statistically significant.
Sixty patients completed the study, 33 had left and 27 had right arthrosis. There was no significant difference between studied groups as regards demographic data and duration of symptoms (p > 0.05) (
As regards duration of surgery, amount of daily drainage (
All patients showed a progressive increase in the range of motion throughout the first three postoperative days. However, the angle of knee joint movement was significantly (P < 0.05) better in the combination group compared with the other groups, with a significantly wider scale of motion in the ropivacaine group compared with the control group (
At time zero (2 h postoperatively) for first evaluation of the pain VAS score, the mean pain VAS score was significantly lower in patients who received intra- rticular analgesia compared with the control group, with significantly lower scores in favour of the combination group.
At 2 h, 35 patients requested for rescue analgesia:16 in the ropivacaine group, 20 in the control group and 9 in the combination group with significantly lower frequency in the combination group compared with both the other groups, with non-significant (P > 0.05) difference in favour of the ropivacaine group.
Control group | Ropivacaine group | Combination group | |
---|---|---|---|
Age (years) | 73.5 ± 8.9 | 73.3 ± 9.2 | 74.5 ± 8.4 |
Gender (M:F) | 7:13 | 6:14 | 8:12 |
Weight (Kg) | 85.9 ± 3.6 | 86.3 ± 4.7 | 87.2 ± 3.7 |
Height (cm) | 167 ± 4.8 | 167.4 ± 4.7 | 166.8 ± 4.8 |
Duration of symptom (years) | 12.6 ± 3.7 | 13.7 ± 3.5 | 12.8 ± 3.8 |
Data are presented as mean ± SD. Gender presented as numbers.
Control group | Ropivacaine group | Combination group | ||
---|---|---|---|---|
Duration of surgery (min) | 67 ± 11.3 | 67.8 ± 12.4 | 68.3 ± 12.5 | |
Scale of motion (˚) | Day 1 | 106 ± 14.9 | 85 ± 14.6* | 71.5 ± 14.2*† |
Day 2 | 92 ± 14.8 | 74.9 ± 14.7* | 66.6 ± 12.8*† | |
Day 3 | 78.5 ± 12.2 | 63.8 ± 11.9* | 53.5 ± 12.5*† | |
Amount of drainage (ml) | Day 1 | 93 ± 25.6 | 94 ± 33.5 | 95 ± 29.1 |
Day 2 | 25.8 ± 11.6 | 29.7 ± 8.1 | 28.4 ± 10.8 | |
Hospital stay (days) | 6.5 ± 1.3 | 6 ± 1.6 | 6.7 ± 0.8 |
Data are presented as mean ± SD. *Significant vs. the control group. †Significant vs. the ropivacaine group.
Thereafter, all studied patients showed progressive decline in pain VAS scores with significantly lower scores in the study groups compared with the control group and a non-significant difference in favour of the combination group until 12 h postoperatively.
At 24, 48, and 72 h, pain VAS scores were significantly lower in the study groups compared with the control group, with significant difference in favour of the combination group (
The number of requests for rescue analgesia and total dose of meperidine consumed up to 72 h postoperatively were significantly (P < 0.05) lower in patients who received intra-articular analgesia compared with the control group, with significantly fewer requests and lower total meperidine dose in the combination group compared with the ropivacaine group (
There was a significant positive correlation (r = 0.376, P = 0.017) between pain VAS scores and angle of knee joint flexion recorded at 72 h postoperatively in the intra-articular groups. No catheter port-site infection was reported, and no complications related to the procedure or medications were reported. There
Control group | Ropivacaine group | Combination group | ||
---|---|---|---|---|
VAS | 2 h PO | 6.6 ± 1.4 | 4.86 ± 1* | 3.7 ± 0.8*† |
4 h PO | 5.1 ± 1.3 | 2.65 ± 1.3* | 2.55 ± 1.5* | |
8 h PO | 3.9 ± 2.2 | 2.9 ± 1.2* | 2.3 ± 0.8* | |
12 h PO | 4.2 ± 1.4 | 2.66 ± 1.3* | 1.9 ± 1.2* | |
24 h PO | 3.7 ± 1.6 | 2.8 ± 1.3* | 1.91 ± 1.2*† | |
48 h PO | 4.5 ± 1.6 | 2.5 ± 1.2* | 1.66 ± 0.8*† | |
72 h PO | 3.4 ± 1.5 | 1.8 ± 1.1* | 1.5 ± 0.6*† | |
Number of request of rescue analgesia (time) | 5.4 ± 1.18 | 3.5 ± 0.9* | 1.88 ± 0.57*† | |
Total dose of meperidine | 268 ± 59 | 172 ± 31* | 91.9 ± 32.6*† |
Data are presented as mean ± SD. PO, postoperative; VAS, visual analogue pain scale. *Significant vs. the control group. †Significant vs. the ropivacaine group.
were no cases of drug-related allergy or side effects, nor were there port-site infection or complications.
Intra-articular analgesia proved effective for management of postoperative pain in total knee arthroplasty patients, irrespective of the medication used, as manifested by the significantly lower pain VAS scores recorded throughout 72 h after surgery, in comparison with patients who did not receive intra-articular analgesia (group C). In support of the benefits of intra-articular analgesia, patients who received intra-articular analgesia showed a significantly wider scale of joint motion compared with the (group C), with significantly wider scale of motion recorded in the (group RT) compared with the (group R) alone.
Commensurate with these results, Dobrydnjov et al. [
However, the results obtained from continuous ropivacaine infusion were superior to those reported by Chen et al. [
The provided postoperative pain control measure allowed rapid movement in patients, with a progressively increasing range of motion, thus inducing alleviation of patient apprehension and release of emotional stress with a subsequent uneventful postoperative course and easy rehabilitation.
In line with data, Koltka et al. [
Commensurate with the use of combined intra-articular therapy, Senthilkumaran et al. [
Ayoglu et al. [
These beneficial effects of intra-articular analgesia could be attributed to the direct target effect of the analgesic used; however, considering the fact that ropivacaine is a fixed medication provided for both groups, the enhanced analgesic effect of the combination of ropivacaine and tramadol could be attributed to the effect of tramadol. Moreover, considering the weak absorption occurring through the tissues of the joint cavity, the effect of tramadol could not be attributed to a systemic effect but mostly to a local effect.
Such data were dependent on the previous work of Gutierez et al. [
As an explanation for the varied effects of opiates, Liu and Wang [
The obtained results and review of the literature allowed us to conclude that continuous intra-articular tramadol/ropivacaine infusion safely reduced postoperative pain scores and spared rescue analgesics with a significantly improved range of joint movement. The shortage in this study in a form of short period of follow up 3 days only (should be followed up for a long period). In the future studies we recommended that the follow up as regard the range of motion, Postoperative VAS score and other parameter must be more than 3 days and if a long time treatment will have a complications or not.
Eldemrdash, A.M. and Abdelzaam, E.-S.M. (2018) Continuous Intra-Articular Ropivacaine/Tramadol Combination Infusion Therapy Improves Postoperative Outcome of Total Knee Arthroplasty. Open Journal of Anesthesiology, 8, 137-146. https://doi.org/10.4236/ojanes.2018.85015