Interventional Pain Physician
5+ Year Member
Nov 11, 2012
Attending Physician
Latest hospital scam. Throw a TENS unit on every total knee. I have heard they get reimbursed around a grand for the $30 unit. I'm sure they get more than I get for a CESI.

Drug-Free Interventions to Reduce Pain or Opioid Consumption After Total Knee Arthroplasty

JAMA Surgery
August 16, 2017 Original Article

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There is increased interest in nonpharmacological treatments to reduce pain after total knee arthroplasty. Yet, little consensus supports the effectiveness of these interventions.

To systematically review and meta-analyze evidence of nonpharmacological interventions for postoperative pain management after total knee arthroplasty.

Data Sources
Database searches of MEDLINE (PubMed), EMBASE (OVID), Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Database of Systematic Reviews, Web of Science (ISI database), Physiotherapy Evidence (PEDRO) database, and for the period between January 1946 and April 2016.

Study Selection
Randomized clinical trials comparing nonpharmacological interventions with other interventions in combination with standard care were included.

Data Extraction And Synthesis
Two reviewers independently extracted the data from selected articles using a standardized form and assessed the risk of bias. A random-effects model was used for the analyses.

Main Outcomes And Measures:
Postoperative pain and consumption of opioids and analgesics.

Of 5509 studies, 39 randomized clinical trials were included in the meta-analysis (2391 patients). The most commonly performed interventions included continuous passive motion, preoperative exercise, cryotherapy, electrotherapy, and acupuncture. Moderate-certainty evidence showed that electrotherapy reduced the use of opioids (mean difference, −3.50; 95% CI, −5.90 to −1.10 morphine equivalents in milligrams per kilogram per 48 hours;P = .004;I2 = 17%) and that acupuncture delayed opioid use (mean difference, 46.17; 95% CI, 20.84 to 71.50 minutes to the first patient-controlled analgesia;P < .001;I2 = 19%). There was low-certainty evidence that acupuncture improved pain (mean difference, −1.14; 95% CI, −1.90 to −0.38 on a visual analog scale at 2 days;P = .003;I2 = 0%). Very low-certainty evidence showed that cryotherapy was associated with a reduction in opioid consumption (mean difference, −0.13; 95% CI, −0.26 to −0.01 morphine equivalents in milligrams per kilogram per 48 hours;P = .03;I2 = 86%) and in pain improvement (mean difference, −0.51; 95% CI, −1.00 to −0.02 on the visual analog scale;P < .05;I2 = 62%). Low-certainty or very low-certainty evidence showed that continuous passive motion and preoperative exercise had no pain improvement and reduction in opioid consumption: for continuous passive motion, the mean differences were −0.05 (95% CI, −0.35 to 0.25) on the visual analog scale (P = .74;I2 = 52%) and 6.58 (95% CI, −6.33 to 19.49) opioid consumption at 1 and 2 weeks (P = .32,I2 = 87%), and for preoperative exercise, the mean difference was −0.14 (95% CI, −1.11 to 0.84) on the Western Ontario and McMaster Universities Arthritis Index Scale (P = .78,I2 = 65%).

Conclusions And Relevance:
In this meta-analysis, electrotherapy and acupuncture after total knee arthroplasty were associated with reduced and delayed opioid consumption.

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SDN Lifetime Donor
Lifetime Donor
10+ Year Member
May 30, 2005
Canton GA
Attending Physician
Of 5509 studies, 39 randomized clinical trials were included in the meta-analysis.

We can stop there and toss any possible conclusions out the window.

Purpose of the study was to push a predisposed intervention or treatment.
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