CPM Machines
CPM Machines — Kinetec & OptiFlex, $3,825 to $19,117
Peak Primal Wellness carries a curated selection of clinical-grade CPM machines from Kinetec and OptiFlex, two of the most respected names in continuous passive motion therapy. Prices range from $3,825 to $19,117, covering knee, elbow, shoulder, ankle, and hand and wrist joints.
CPM machines are used primarily during post-surgical recovery, particularly after joint replacement or ligament repair, where controlled passive movement helps reduce stiffness and support tissue healing without active muscle effort. Continuous passive motion (CPM) machines work by moving the joint through a prescribed range repeatedly, without requiring the patient to engage surrounding muscles, which is exactly why surgeons value them in the earliest recovery days. Choosing the right unit comes down to the target joint, the patient's size and positioning needs, and whether you need a portable setup for home use or a more robust device suited to a clinical or rehab environment.
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CPM Machines Buying Guide: Three Decisions
Answer these in order and the shortlist writes itself.
Match the Device to the Surgical Joint
Joint specificity: CPM machines are not interchangeable across joints. A knee unit cannot treat a shoulder, and elbow devices are built around very different mechanics. Start by confirming the exact joint involved before comparing models.
ROM requirements: Your surgeon will specify a target range of motion for the rehabilitation protocol. Cross-reference that range against each device's listed ROM limits to confirm the machine can meet the clinical prescription.
Consider Patient Size and Positioning
Carriage width: Patients with larger limbs need machines with wider carriages or adjustable support arms. The Kinetec Spectra Essential's 10-inch carriage was designed specifically to accommodate a broad patient population.
Positioning context: The Kinetec Centura Shoulder CPM Machine is built to work while the patient lies in bed or sits in a wheelchair, which matters significantly for early post-operative care when mobility is very limited.
Evaluate Controls and Safety Features
Hand controls: Look at how easy the hand control is to operate, especially for patients recovering from upper limb surgery or those with limited dexterity. The OptiFlex K1 offers three hand control ergonomic options at the same price.
Safety mechanisms: Features like load-reverse protection and patient lock-out are important for unsupervised home use. The Kinetec Spectra Essential includes both, along with a 15-minute pause setting for session flexibility.
Portability: If the device will be moved between locations or transported for home rental programs, dual carry handles and a compact profile matter. Check the product dimensions and weight on each listing.
Compare CPM Machines
| Model | Highlights | Price | ||
|---|---|---|---|---|
 OptiFlex K1 Knee CPM
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OptiFlex K1 Knee CPM Machine with Classic Hand Control | OptiFlex-K1 - Simple, Durable, Reliable. Weighs just 23 lbs (10.4 kg), making it the lightest knee CPM on the market. | $3,856 | Shop › |
 OptiFlex K1 Knee CPM
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OptiFlex K1 Knee CPM Machine with Standard Hand Control | OptiFlex-K1 - Simple, Durable, Reliable. Weighs just 23 lbs (10.4 kg), making it the lightest knee CPM on the market. | $3,856 | Shop › |
 Kinetec Spectra Knee CPM
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Kinetec Spectra Knee CPM Machine | Long-life DC motor, anatomically correct alignment to increase patient compliance and decrease joint stress, wide carriage that accommodates entire spectrum | $6,116 | Shop › |
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Kinetec Centura Bed/Wheelchair Shoulder
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Kinetec Centura Bed/Wheelchair Shoulder CPM Machine | Kinetec Centura bed/wheelchair BW helps prevent joint stiffness, soft tissue contractures, atrophy. Patient set-up is anatomical, comfortable and quick with | $7,556 | Shop › |
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Kinetec Maestra Hand and
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Kinetec Maestra Hand and Wrist CPM Machine | ROM: fingers: 45 degrees hyperextension and 27 degrees flexion. Thumb: full opposition. Wrist: -50 degrees extension, -90 degrees flexion, -90 | $7,736 | Shop › |
 OptiFlex ARTROMOT E2 Elbow
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OptiFlex ARTROMOT E2 Elbow CPM Machine | ARTROMOT E2 Elbow CPM provides anatomical motion for the elbow and enhances patient comfort and compliance. The Artromot Elbow CPM | $10,237 | Shop › |
Key Benefits of CPM Machines
Maintained Range of Motion After Surgery
One of the primary reasons surgeons recommend CPM machines is to keep the joint moving passively during the early recovery window when active exercise is not yet safe. This continuous movement helps prevent the stiffness and contractures that can develop if a joint is immobilized after a procedure. Consistent use of a CPM machine during the prescribed recovery period can meaningfully support long-term flexibility outcomes.
Reduced Swelling and Soft Tissue Stress
Passive motion promotes circulation in the joint and surrounding soft tissue without placing load on the healing structures. This helps manage post-operative swelling more effectively than rest alone. The Kinetec Centura Shoulder CPM Machine, for example, was specifically designed to address soft tissue contractures and atrophy during shoulder recovery.
Convenient Home Recovery Setup
CPM machines give patients the ability to follow their rehabilitation protocol at home rather than making repeated clinic visits during the most vulnerable phase of recovery. Models with patient lock-out features and intuitive hand controls make it realistic for patients to manage sessions independently and safely between therapist check-ins.
Clinically Designed Motion Precision
CPM machines from Kinetec and OptiFlex are built to deliver repeatable, anatomically correct motion rather than approximations. The Kinetec Maestra Hand and Wrist CPM Machine, for instance, replicates complex multi-plane wrist and finger motion that would be difficult to achieve through manual therapist-guided movement alone. That precision matters when the goal is restoring full functional range after a delicate procedure.
Brands in This Category
Space and Placement
Measure twice. These are the numbers that cause returns.
Carriage Width on Knee Models
The Kinetec Spectra Essential features a 10-inch wide carriage, which accommodates patients across a broad range of leg sizes without additional attachments. This is a practical consideration for clinical environments where multiple patients of different builds will use the same device.
Maximum Knee Flexion Range
The Kinetec Spectra Essential Knee CPM Machine reaches up to 120 degrees of flexion, covering the range of motion typically targeted in total knee replacement recovery protocols. Most daily functional activities require well under 120 degrees, so this ceiling gives clinicians adequate room to progress the patient safely.
Wrist Flexion and Rotation Depth
The Kinetec Maestra Hand and Wrist CPM Machine delivers up to 90 degrees of wrist flexion, 90 degrees of pronation, and 90 degrees of supination, covering the full rotational arc of the wrist joint. For patients recovering from complex wrist surgery, this depth of motion is difficult to replicate with standard manual therapy alone.
Ownership: Delivery, Install, Warranty and Care
Shipping & Freight
CPM machines are medical-grade devices and typically ship via freight or specialized ground carriers depending on size and destination. Delivery timelines generally range from two to four weeks after order confirmation, though specific lead times vary by model and availability. You will receive tracking information once your order has been processed and dispatched.
Setup & Installation
CPM machines arrive largely pre-assembled and are designed to be set up by the end user or a caregiver without specialized tools. Kinetec models use a color-coded setup system that makes anatomical positioning straightforward, even for first-time users. Most units plug into a standard household outlet and do not require any dedicated electrical work.
Warranty & Support
Warranty coverage varies by brand and model, so review the specific warranty terms on each product page before purchasing. Kinetec and OptiFlex are established medical device manufacturers, and their products are held to clinical durability standards. For devices being used in a clinical or rental context, confirm whether the warranty transfers between patients or facilities.
Care & Maintenance
CPM machines used in post-operative recovery should be cleaned between patients using disinfectant wipes or sprays approved for medical equipment surfaces. Limb supports and padding should be inspected regularly for wear, particularly on devices used across multiple patients. Moving parts and motor components should be checked periodically per the manufacturer's maintenance guidelines to ensure consistent and safe motion delivery.
CPM Machines FAQ
What is the best cpm machines?⌄
For knee recovery, the Kinetec Spectra Essential Knee CPM Machine ($5,036) is a strong all-around choice with a wide carriage and patient lock-out. For multi-joint clinical setups, the Kinetec Maestra Hand and Wrist CPM Machine ($7,736) and the Kinetec Centura Bed/Wheelchair Shoulder CPM Machine ($7,556) cover more specialized needs. The OptiFlex K1 Knee CPM Machine at $3,856 is the best value entry point for straightforward knee rehab.
How do Kinetec and OptiFlex CPM machines compare?⌄
Kinetec tends to offer more joint-specific variety, with dedicated devices for the shoulder, elbow, hand and wrist, and ankle alongside its knee machines. OptiFlex focuses more narrowly on knee and elbow models but at competitive price points. Both brands use anatomically informed designs. Kinetec's color-coded setup system appeals to clinical environments; OptiFlex's hand control options make it easy for patients to manage sessions independently at home.
Who needs a CPM machine?⌄
CPM machines are most commonly used by patients recovering from orthopedic surgery, including total knee replacement, ACL reconstruction, shoulder repairs, and elbow procedures. Physical therapists and orthopedic surgeons often recommend them to reduce swelling, prevent scar tissue formation, and maintain joint range of motion during the first weeks after surgery when active exercise is not yet appropriate.
Can I use a CPM machine at home without a therapist present?⌄
Yes, most models in this collection are designed with home use in mind. Features like patient lock-out on the Kinetec Spectra Essential prevent accidental program changes, and the pause setting allows sessions to be interrupted safely. That said, you should always follow the range of motion settings prescribed by your surgeon or physical therapist and check in regularly during recovery.
How long are CPM machine sessions?⌄
Session length varies based on your surgeon's protocol, but many post-operative programs start with one to two hours per session and may extend to longer daily use as recovery progresses. Some devices like the Kinetec Spectra Essential include a 15-minute pause setting, which can help patients take breaks without losing their programmed settings. Always follow the guidance of your medical team.
What joints can be treated with the CPM machines you carry?⌄
The collection covers five joint groups: knee (Kinetec Spectra Essential, Kinetec Spectra, OptiFlex K1), elbow (Kinetec 6080, Kinetec Centura CEM, OptiFlex ARTROMOT E2), shoulder (Kinetec Centura Bed/Wheelchair), ankle (Kinetec Breva, OptiFlex Ankle), and hand and wrist (Kinetec Maestra). This range means the right device is available regardless of which joint was operated on.
What range of motion do these devices support?⌄
It depends on the joint and model. The Kinetec Maestra Hand and Wrist CPM Machine covers 45 degrees of finger hyperextension, 90 degrees of wrist flexion, and full thumb opposition. The Kinetec Spectra Essential Knee CPM Machine goes from hyperextension to 120 degrees of flexion. Each product page lists the specific ROM figures so you can confirm the device matches your clinical requirements.
Are continuous passive motion (CPM) machines covered by insurance?⌄
Coverage varies significantly by insurer, plan type, and diagnosis. Many Medicare and private insurance plans have covered CPM machine rental or purchase following total knee replacement, though coverage policies have changed over the years. It is worth contacting your insurer directly and having your surgeon document the medical necessity. We recommend verifying your specific coverage before purchase.
What is the difference between the OptiFlex K1 hand control options?⌄
The OptiFlex K1 Knee CPM Machine is available with three hand control variants, Standard, Classic, and Comfort, all at the same $3,856 price. The differences relate to ergonomics and ease of use rather than therapeutic function. Patients who have limited hand dexterity due to their condition or age may find the Comfort hand control easier to operate during sessions.
How do I size a CPM machine for a patient?⌄
Most CPM machines use adjustable limb support systems rather than fixed sizes, so they accommodate a wide range of patient dimensions. The Kinetec Spectra Essential features a wide 10-inch carriage designed to fit all patients. For shoulder and elbow devices, setup is guided by anatomical landmarks. Check each product's specifications for limb length and weight accommodation details before ordering.
Do CPM machines require any special electrical setup?⌄
Most CPM machines in this collection run on standard household current and do not require dedicated circuits or professional electrical installation. They are typically plug-and-play devices intended for bedside or home use. If you are setting up a clinical space with multiple devices running simultaneously, confirm your circuit load with an electrician.
What should I look for in warranty and support for a CPM machine?⌄
Kinetec and OptiFlex are established medical device manufacturers, and their devices are built to clinical durability standards. Warranty specifics vary by model and are detailed on each product page. For medical-grade equipment at these price points, confirm what the warranty covers, whether parts and labor are included, and what the process is for service or replacement if the device malfunctions during a patient's recovery period.
