Addition of tramadol to ropivacaine for FNB improves analgesia in total knee arthroplasty

J Orthop Surg (Hong Kong). 2016 Aug;24(2):183-7

Analgesics have no effect on functional outcome in CLBP patients

Eur Spine J. 2014 Apr;23(4):800-6

ACL reconstruction: Morphine–bupivacaine more effective than tramadol–bupivacaine

Knee Surg Sports Traumatol Arthrosc. 2012 Sep;20(9):1839-44. doi: 10.1007/s00167-011-1791-7. Epub 2011 Nov 24.

Tramadol PCA with metoclopramide equivalent to morphine PCAin pain reduction following TKA

Pain Med. 2013 Sep;14(9):1426-34

Combination of dexketoprofen/tramadol reduces postoperative pain vs. monotherapy in THA

Br J Anaesth. 2016 Feb;116(2):269-76.

Tramadol addition in interscalene block associated with lower 24-hr pain in shoulder surgery

Medicina (Kaunas). 2019 Jul 23;55(7). pii: E399. doi: 10.3390/medicina55070399

Efficacy of acetaminophen - with and without tramadol - for analgesia in extremity fracture fixation

J Bone Joint Surg Am. 2017 Nov 15;99(22):1908-1915

OTA2017: Similar postop pain with splinting vs bandaging following distal radius fracture fixation

Stellate ganglion block for upper limb surgery reduces pain and tramadol consumption

Anaesthesia. 2014 Sep;69(9):954-660

Treadmill walking model is successful in evaluating the efficacy of analgesia in knee OA

Osteoarthritis Cartilage. 2010 May;18(5):646-53. Epub 2010 Feb 6.

Bupivacaine-fentanyl combination superior option following knee arthroscopy

Arthroscopy. 2011 Dec;27(12):1637-43. Epub 2011 Nov 1

Immobilization vs. no immobilization following volar plate fixation of a distal radius fracture

Injury. 2019 Feb;50(2):386-391.

Preliminary evidence of increased re-tear rate with COX-2 inhibitors after rotator cuff repair

Am J Sports Med. 2018 Mar;46(3):679-686

Immediate- vs extended-release tramadol HCL/acetaminophen for pain following TKA

Curr Med Res Opin. 2015 Jan;31(1):75-84.

Comparison of pregabalin & opioids for chronic low back pain in elderly patients

Eur Spine J. 2015 Jun;24(6):1309-17

Transdermal buprenorphine offers analgesia similar to oral tramadol in post-spinal fusion management

Eur Spine J. 2017 Nov;26(11):2961-2968

Preemptive periacetabular vs intraarticular bupivacaine for analgesia after arthroscopy

Arthroscopy. 2017 Jan;33(1):118-124

AAOS2019: PAI with liposomal bupivacaine does not reduce narcotic use vs. standard cocktail in TKA

Addition of low-dose morphine to spinal anaesthesia improves analgesia with cFNB in TKA

BMC Anesthesiol. 2016 Jul 16;16(1):38

Femoral nerve block & fascia iliaca block provide similar pain relief following TKA

J Arthroplasty. 2010 Dec;25(8):1246-9. doi: 10.1016/j.arth.2009.11.018. Epub 2010 Feb 23