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BY
ASS.PROF.DR. MOHAMED SERAG
DR. DOAA TAMMAM
Continuous passive motion
CPM
Definition :
Continuous passive motion
(CPM) is a treatment method
that help in recovery of joints
immediately after trauma or
surgery.
 CPM carried out by CPM device which
constantly move the joint through a
controlled ROM , the exact range is
dependent on the joint but in the most cases
the range of motion is increase over time.
- Mechanism of Action
 Mechanism of action to aid joint recovery depend
on what surgery is performed.
 1- movement of synovial fluid : to allow for
better diffusion of nutrients into damaged
cartilage and diffusion of blood and waste
products
 2- another mechanism: is the prevention of
fibrous scar tissue formation in the joint, which
tend to decrease the ROM for joint.
 CPM can be used clinically in post operative
rehabilitation and management:
 1-after ligament repair or other intra-
articular surgery
 2-internal fixation of fracture
 3-joint manipulation for contractures
 4-total joint replacement
Uses of CPM:
Clinical advantage of CPM
 1- Providing early motion
 2-achieving functional ROM
 3-Aid in pain relief
 4-improve general circulation
 5-reduce edema
 6-improve cartilage synovial fluid
 7-retard (delay)muscular atrophy
 8- stiffness
 9- incidence of complication
 10- reduce hospital stay
 11-enhance wound healing
Disadvantages:
 1- increased length of time spend in bed
limiting walking
 2- considerable maintenance costs
 3- Mismatching of the units due to different
leg sizes- shape
 4- CPM affected only the ROM and swelling
not muscular activity or power
Contraindication:
1- Unstable Fractures
2- Loss Of Sensation
3- Un Controlled Or Untreated Infection
Precautions:
Patients Can Complain As Result Of :
1- Inability To Apply Machine Properly
2- Lack Of Training For Nursing Or Therapist Who
Might Render Use Of Device a Risk To The Patient
Risks:
1- wound complication
2- disruption of surgical
measure such as ligament repair
3-malfunction of the device
CPM materials and functions:
 CPM device composed of 3 major parts:
 -Limb carrier
 - the motor
 - the controls
there are 3 variables to each subject:
 1- the size of motion arc
 2-the position of the motion arc in
relationship to normal arc of the joint
 3-the rate of motion
Characteristics of CPM unit:
 1- the device should fit anatomy to be moved as
closely as possible
 2-the axis and the quantity of motion should be as
close as possible to patients (the repaired joint and
perpendicular structures will then be protected
from adverse stress)
 3-the device should be adjustable in order to
increase or decrease the ROM within the
comfortable levels of the patient
 4- the machine must be designed to resist
fatigue during operation in the device
 5- the device must be easy to control easily
turned off and on by patients and easily
adjusted by physician.
 6- the device should be portable
Application
 1- therapist application of CPM device should be
within 72 hours following surgery.
 2- the device itself supports the limb and slowly
move the joint without patient assistance and move
through 24 hours.
 3- application of device is continued from 1- 4 weeks.
CPM
CPM
Evidence base
 Recent studies compare between long tem goal and
short term goal in using PROM and CPM:
 Studies observe that CPM most effective than
PROM in short term goal ( pain , swelling, and
start move early)
 But no difference between PROM and CPM in long
term goal
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CPM

  • 1. BY ASS.PROF.DR. MOHAMED SERAG DR. DOAA TAMMAM Continuous passive motion CPM
  • 2. Definition : Continuous passive motion (CPM) is a treatment method that help in recovery of joints immediately after trauma or surgery.
  • 3.  CPM carried out by CPM device which constantly move the joint through a controlled ROM , the exact range is dependent on the joint but in the most cases the range of motion is increase over time.
  • 4. - Mechanism of Action  Mechanism of action to aid joint recovery depend on what surgery is performed.  1- movement of synovial fluid : to allow for better diffusion of nutrients into damaged cartilage and diffusion of blood and waste products  2- another mechanism: is the prevention of fibrous scar tissue formation in the joint, which tend to decrease the ROM for joint.
  • 5.  CPM can be used clinically in post operative rehabilitation and management:  1-after ligament repair or other intra- articular surgery  2-internal fixation of fracture  3-joint manipulation for contractures  4-total joint replacement Uses of CPM:
  • 6. Clinical advantage of CPM  1- Providing early motion  2-achieving functional ROM  3-Aid in pain relief  4-improve general circulation  5-reduce edema  6-improve cartilage synovial fluid  7-retard (delay)muscular atrophy  8- stiffness  9- incidence of complication  10- reduce hospital stay  11-enhance wound healing
  • 7. Disadvantages:  1- increased length of time spend in bed limiting walking  2- considerable maintenance costs  3- Mismatching of the units due to different leg sizes- shape  4- CPM affected only the ROM and swelling not muscular activity or power
  • 8. Contraindication: 1- Unstable Fractures 2- Loss Of Sensation 3- Un Controlled Or Untreated Infection Precautions: Patients Can Complain As Result Of : 1- Inability To Apply Machine Properly 2- Lack Of Training For Nursing Or Therapist Who Might Render Use Of Device a Risk To The Patient
  • 9. Risks: 1- wound complication 2- disruption of surgical measure such as ligament repair 3-malfunction of the device
  • 10. CPM materials and functions:  CPM device composed of 3 major parts:  -Limb carrier  - the motor  - the controls there are 3 variables to each subject:  1- the size of motion arc  2-the position of the motion arc in relationship to normal arc of the joint  3-the rate of motion
  • 11. Characteristics of CPM unit:  1- the device should fit anatomy to be moved as closely as possible  2-the axis and the quantity of motion should be as close as possible to patients (the repaired joint and perpendicular structures will then be protected from adverse stress)  3-the device should be adjustable in order to increase or decrease the ROM within the comfortable levels of the patient
  • 12.  4- the machine must be designed to resist fatigue during operation in the device  5- the device must be easy to control easily turned off and on by patients and easily adjusted by physician.  6- the device should be portable
  • 13. Application  1- therapist application of CPM device should be within 72 hours following surgery.  2- the device itself supports the limb and slowly move the joint without patient assistance and move through 24 hours.  3- application of device is continued from 1- 4 weeks.
  • 16. Evidence base  Recent studies compare between long tem goal and short term goal in using PROM and CPM:  Studies observe that CPM most effective than PROM in short term goal ( pain , swelling, and start move early)  But no difference between PROM and CPM in long term goal