The Association Between Pre-operative Pain Psychology and Hypersensitivity With Poor Functional Outcome After Knee Replacement.
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|ClinicalTrials.gov Identifier: NCT03132064|
Recruitment Status : Not yet recruiting
First Posted : April 27, 2017
Last Update Posted : December 10, 2019
To explore whether there are factors that help us to understand why some patient outcomes are not successful and identify prediction factors for progression. Assess central pain sensitisation and psychology pre- and post-surgery with reliable tools that explore prediction tools for good/poor progression and improve patient selection, patient preparation and timing for surgery.
The aim of this project is to explore the effects of pre-surgical central pain sensitisation on pain and function outcomes post-TKA. Central pain sensitisation will be assessed using pressure algometry and the Pain Catastrophizing Scale will be used to explore pain psychology. Functional outcomes post-TKA will be assessed using a commonly used scale for patients' self-reported outcomes (Oxford Knee Score), visual analogue scale, a star excursion balance test and four recommended patient performance-based tests.
|Condition or disease||Intervention/treatment|
|Outcome After Total Knee Arthroplasty||Procedure: total knee arthroplasty|
|Study Type :||Observational|
|Estimated Enrollment :||50 participants|
|Official Title:||The Association Between Pre-operative Pain Psychology and Hypersensitivity With Poor Functional Outcome After Knee Replacement|
|Estimated Study Start Date :||September 12, 2020|
|Estimated Primary Completion Date :||February 1, 2022|
|Estimated Study Completion Date :||December 1, 2022|
post total knee arthroplasty
The measurements will made for patients before and after total knee arthroplasty to explore the improvements and possible correlation with preoperative pain psychology and hypersensitivity
Procedure: total knee arthroplasty
surgical repair for end stage of knee osteoarthritis.
Other Name: total knee replacement surgery
- Changes in Pain Catastrophizing Scale (PCS) [ Time Frame: before surgery and 6 months after ]
Catastrophizing contributes to heightened levels of pain, emotional distress, chronic pain and disability (Forsythe, Dunbar, Hennigar, Sullivan, & Gross, 2008).
The PCS has 13 items and can be completed and scored in less than 5 minutes. It reflects past painful experiences and indicates the degree to which patients experience each of 13 thoughts or feelings when in pain. It has 5-point scales with end points (0) not at all and (4) all the time. Between the 50th and 75th percentiles of PCS score, patients are considered at moderate risk and at more than the 75th percentile they are consider at high risk for developing chronicity. It is a reliable and valid catastrophizing measure, it shows excellent internal consistency, total score coefficient alphas = .87-.93 and significant correlation with the Inventory of Negative Thoughts in Response to Pain scale and general psychological disturbance (MASQGeneral Disturbance) scale (Osman et al., 1997; Sullivan & et al., 1995) (Appendix 3).
- Changes in Central Sensitisation using pressure algometry [ Time Frame: before surgery and 6 months after ]Pressure will be applied using a handheld pressure algometer (Algometer Type II, Somedic AB, Sweden) at a rate of 30 kPa/s perpendicular to the skin with a 1 cm² probe. The pressure pain threshold will be estimated by instructing participants to say 'stop' when the sensation of pressure becomes the first sensation of pain (Arendt-Nielsen et al., 2010; Lunn, Kristensen, Gaarn-Larsen, & Kehlet, 2012; Skou et al., 2013). Pressure will be applied to the medial side of the operated knee and the volar surface of the same side forearm. These two body sites are chosen because they represent painful areas in knee OA patients and may provide evidence of widespread pain sensitisation (forearm) and localised pain sensitisation (knee) (Wylde, Palmer, Learmonth, & Dieppe, 2011; Wylde et al., 2013). The site for knee pressure will be at 3 cm medial to the midpoint on the medial edge of the index patella
- Changes in Oxford Knee Score (OKS) [ Time Frame: before surgery and 6 months after ]
A final version of a 12-item questionnaire was developed to assess patients post-TKA after interviews with patients undergoing joint replacement and a multiple drafting process to identify their experiences and problems post-TKA since 1998 (Appendix 4).
OKS is a valid, reliable and responsive assessment tool for the period post-TKA, it has advantages over the Western Ontario and McMaster Universities Osteoarthritis Index - Knee Injury and Osteoarthritis Outcome Score, as it simple and short. As a PROM's main concern is to explore outcomes from the patient's perspective, OKS has the advantage of offering clear MIDC values for all types of study and is designed to ensure that results are recognized by patients, in addition to statistical differences, and this may improve the power calculation (Beard et al., 2015; Clement, MacDonald, Patton, & Burnett, 2015; Clement, MacDonald, & Simpson, 2014; Dawson, Fitzpatrick, Murray, & Carr, 1998)
- Changes in pain visual analogue scale (VAS); [ Time Frame: before surgery and 6 months after ]The pain visual analogue scale will used to assess the pain before and after the surgery. The scale consist of a 100 mm long horizontal line ranging from no pain to intolerable pain (Appendix 4). Patients will instruct to mark the line at the point matched their pain. The assessor will measure with ruler the millimetres and converted to points (0 points no pain to 100 points intolerable pain) (Bullens, van Loon, de Waal Malefijt, Laan, & Veth, 2001).
- Changes in Assessment of Performance based measurements (30 s chair-stand test) [ Time Frame: before surgery and 6 months after ]Based in published protocol, the chair with 17 inches (45cm) height with starting position will be sitting with arm cross the chest. The patients will instruct to stand then sit with good buttock placement, back support, hand on arm rest and foot placements then stand again as fast and safe as they can. The assessor will count the number of complete chair stand within the 30 second. The mean of two trail will use for analysis (Gill & McBurney, 2008; Unver, Kalkan, Yuksel, Kahraman, & Karatosun, 2015).
- Changes in stair-climb test [ Time Frame: before surgery and 6 months after ]The assessor will measure the time required using timed stopwatch within one hundredth of second using one handrail if required to ascend and descend flight of twelve 18-cm-high steps and 28 cm depth. The patients will instruct to ascend and descend the stairs as quickly, safe and comfortable they can. The mean of two trail will use for analysis (Mizner et al., 2011).
- Changes in Timed up-and-go test [ Time Frame: before surgery and 6 months after ]According to published protocol the test procedure will be as following based on used timed stopwatch within one hundredth of second, standard height chair of 45cm with arm rest will placed on an outdoor level footpath and a line 3 meters from the chair will draw. The patients will instruct to rise from chair using the arms if required, walk for 3 meter until the line mark then turn back to sit on the chair as quickly, safe and comfortable they can. The assessor commenced timing as the patient leaned forward to stand up, and stop when the patient hips made contact with the seat to sit down. Average of 3 performance will analysis (Ko, Naylor, Harris, Crosbie, & Yeo, 2013; Mizner et al., 2011; Podsiadlo & Richardson, 1991).
- Changes in Six minute walk test [ Time Frame: before surgery and 6 months after ]Based on the test published guideline the test will measure how far the patients can walk in 6 minute in level surface, 25 meter footpath. The patient can use the assistive device if required, take rest if need with standardized encouragement after each minute. The assessor will ask the patient to stop at 6 minute. One test will be perform to avoid fatigue ("ATS Statement," 2002; Ko et al., 2013; Mizner et al., 2011).
- Changes in Balance Test [ Time Frame: before surgery and 6 months after ]Balance will be assessed using the simple Star Excursion Balance Test, which is considered to be a reliable, valid dynamic test to identify dynamic balance deficits in patients with lower extremity conditions. The assessor will measure the reach distance in each direction in centimetres and then normalise the average of the three trials to leg length. Limb length will be measured while lying in a supine position from anterior superior iliac spine to the centre of the ipsilateral medial malleolus. Reach distances will be normalised to limb length by calculating the maximum reach distance (%MAXD) using the formula (excursion distance/limb length) ×100 (Coughlan, Fullam, Delahunt, Gissane, & Caulfield, 2012; Fullam et al., 2014; Robinson & Gribble, 2008).
- Changes in Physical activity [ Time Frame: before surgery and 6 months after ]measurements will be made using an activPAL activity monitor (PAL Technologies, Glasgow, UK) as this proven accelerometer provides objective quantification of free-living physical activity without any modification (Dahlgren, Carlsson, Moorhead, Hager-Ross, & McDonough, 2010; Schmalzried et al., 1998). It is suitable as it light in weight (20g), includes an inclinometer and is small in size (53 x 35 x 7 mm) Figure 3. The device is worn by patient's mid-thigh, secured by non-allergic waterproof adhesive tape under their clothes, for 7-10 days before surgery and 6 months after. Clear written and verbal instructions will be given to patients as they have to wear it all day and all night except, when bathing or swimming (they can take a shower with it on).
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03132064
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|Stockport NHS Foundation Trust|
|Stockport, Manchester, United Kingdom, SK2 7JE|