CPM, Intermittent Compression, and Traction

Question 1

Continuous Passive Motion (CPM)

Answer 1

-Electrical motorized devices that move joints through a preset partial PROM at a preset controlled speed

Question 2

Goal and usage of CPM

Answer 2

• Goal: To prevent or decrease the negative effects of immobilization
• Use: Post surgically

Question 3

CPM ROM benefits

Answer 3

1. Promotes more natural alignment of collagen fibers
2. Gaines ROM
3. Helps with apprehension to ROM
4. Decreases the need of manipulation following total knee replacement
5. Assists in joint nutrition
6. Assists in venous and lymphatic return (edema reduction)

Question 4

CPM TX Duration

Answer 4

• 1 hour 3 times a day

- 6-8 hours a day post surgery

Question 5

Intermittent Compression

Answer 5

-Mechanical pressure that encourages venous and lymphatic return from extremities.

Question 6

Circumferential Compression

Answer 6

-equal compression to all parts of the covered extremity

Question 7

Sequential Compression

Answer 7

-Compression that increases from distal to proximal through sequential filling of different pressure chambers.

Question 8

Physiologic Effects of Compression

Answer 8

• Decreased capillary hydrostatic pressure
• Causes increased reabsorption of interstitial fluids by lymphatic system
• Creates a second pressure gradient from high pressure to low pressure causing movement of fluid from distal to proximal

Question 9

Compression Application

Answer 9

• On/off ratio (duty cycle) = 3:1 (45 secs on/15 secs off)
• initial tx time usually 20-30 minutes
• Temp for cold units 50-60 degrees F