J Knee Surg 2019; 32(10): 1020-1023
DOI: 10.1055/s-0038-1675415
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Prevalence of Persistent Pain after Total Knee Arthroplasty and the Impact of Neuropathic Pain

Masahiro Hasegawa
1   Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Shine Tone
1   Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Yohei Naito
1   Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Hiroki Wakabayashi
1   Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Akihiro Sudo
1   Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
› Author Affiliations
Further Information

Publication History

03 May 2018

16 September 2018

Publication Date:
09 November 2018 (online)

Preview

Abstract

The present study aimed to define the prevalence of pain persisting after total knee arthroplasty (TKA) and determine the impact of neuropathic pain. Knee pain after TKA was evaluated in 154 patients (222 knees with osteoarthritis) using a numerical rating scale (NRS) and followed up for a mean of 4.7 years. The patients were classified according to whether they had no or mild pain (NRS ≤ 3), or moderate-to-severe pain (NRS > 3), and then assigned to groups with nociceptive, unclear, or neuropathic pain based on responses to painDETECT questionnaires. Risk factors for these types of pain were determined. The ratio of patients with moderate-to-severe pain was 28% (62 knees). Thirteen patients (21 knees; 9%) experienced unclear pain. Patients with moderate-to-severe or unclear pain had malalignment and lower Knee Society knee scores. In conclusion, a significant number of patients experienced moderate-to-severe and unclear pain after TKA. Moderate-to-severe pain was associated with unclear pain.