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Review of manipulation under anaesthesia post total knee replacement with a view of redefining a lower threshold algorithm

In patients with stiffness post total knee replacement, a new algorithm for determining a lower threshold for acceptable range of movement trialled assessing range of movement, time to achieve range of movement, pain, function and patient outcomes scores.

Status
Terminated
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12615000611527
Acronym
MUA algorithm for TKR
Enrollment
4
Registered
2015-06-12
Start date
2015-04-02
Completion date
2017-06-30
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

Stiffness post Total Knee Replacement (TKR) can cause quite significant disability in patients and is associated with persistent pain and inability to perform activities of daily living. Stiffness post TKR has been reported between 8 to 25 percent. The standard management for stiffness is aggressive physiotherapy followed by manipulation under anaesthesia (MUA) predominantly when patients' flexion range of movement (ROM) is restricted to less than or equal to 90degrees. MUA entails forced flexion and extension of the knee under anaesthesia to break the scar tissue causing stiffness, resulting in significant acute improvement usually around 5 to 6 weeks post primary total knee replacement. We propose decreasing that threshold of acceptable range of movement post total knee replacement in patients whom would otherwise deal with the restrictions and would not qualify for MUA under current guidelines. Patients will assessed 5-6 week post total knee replacement and those who have a flexion range less than or equal to "'pre-operative flexion' minus 20 degrees" will be included into the study. Patients selected for participation will be primary TKR patients that fall between 90 degrees and the "new range". Participants meeting selection criteria will be randomised into one of two groups; either 'intervention' or 'control' groups Results analysis will focus on range of movement and patient reported outcomes. We intend to follow up patients and record data for a period of 12 months. This will ensure capture of patients that require late manipulation for worsening function, depicted by manual assessment, patient outcome scores and other complications.

Interventions

Patients will assessed 5-6 week post total knee replacement and those who have a flexion range less than or equal to "'pre-operative flexion'- 20 degrees" will be included into the study. The patients that fit in this group will be randomised into a manipulation or no- manipulation group and we will review the natural progression of their range and function. The intervention group will undergo manipulation under anaesthesia. This entails an anaesthetic in a surgical theatre environment and, o

Patients will assessed 5-6 week post total knee replacement and those who have a flexion range less than or equal to "'pre-operative flexion'- 20 degrees" will be included into the study. The patients that fit in this group will be randomised into a manipulation or no- manipulation group and we will review the natural progression of their range and function. The intervention group will undergo manipulation under anaesthesia. This entails an anaesthetic in a surgical theatre environment and, once anaesthetised, the patients will have their affected knee flexed and extended by the surgeon to achieve better range of movement by tearing through scar tissue that has developed since their total knee replacement. The surgery should only take 30 mins. The choice of anaesthetic used will be decided by the anaesthetist and the surgeon. It usually includes a sedation agent and mild muscle relaxant. Post-op, they will then undergo physiotherapy as inpatients and on discharge.

Sponsors

Orthopaedic Research Institute of Queensland
Lead SponsorCharities/Societies/Foundations

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
45 Years to 90 Years
Healthy volunteers
No

Inclusion criteria

Patients selected for participation will be primary TKR patients that fall between 90 degrees and the minimum redefined range. This range will be calcuted by (pre-op flexion-20) expressed in degrees They must be well and fit for the second smaller anaesthetic

Exclusion criteria

Flexion similar to pre-operative range Flexion less than 90 degrees Unfit for second anaesthetic

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026