Benefits of System 4:

• Advanced dynamometer technology for greater performance
• Seat design accommodates athlete to pediatric applications
• Windows® 10 Enterprise LTSC prevents intrusive update
  pop-ups and requests
• Software interface, no other system is faster or easier to use
• Feature rich software proves need, progress and outcome
• Touchscreen for quick, easy operation
• Simplified patient positioning with on-screen audio and visual aids
• Requires only 64 sq-ft of operating space
• Activity-specific work simulation exercises
• Wide range of normative data, from pediatric through adults, ages 5 - 83
• Excellent after-sale support, installation and continuing education programs

Versatility and marketability

System 4 is dependable and versatile – providing the means to take on new challenges and be adaptable to keep pace with progressive thinking and innovation.

Sports and Orthopedic Medicine 
Whether your orthopedic and sports medicine practice is allowed only limited visits or you have the luxury of managing a complete recovery, Biodex is the tool that adapts to every environment. Evidence-based clinical protocols combine science with practical application to ensure that you provide the best outcomes.

• Hamstring Injury >>
• Anterior Cruciate Ligament (ACL) Injury >>
• Knee Osteoarthritis
• Lateral Ankle Sprains
• Patellofemoral Dysfunction

Other capabilities include preseason screening, injury prevention and athletic performance enhancement.

Pediatric Medicine
Used to treat children worldwide, Isokinetic muscle testing helps clinicians by providing objective data for neuromuscular control and strength. Pediatric attachments and age-based normative data are available. View normative data for quadriceps and hamstrings in children ages 6-13 years.

Neurorehabilitation
For the management of persons with movement disorders, neurologic pathologies, or general deconditioning; an Integrated Protocol Using Instrument. The system helps patients build strength, endurance and coordination. Spasticity management includes objective quantification at specific contraction. Use Passive mode for repetitive exercises. Eccentric mode is useful for controlled strengthening.

• Upper extremity attachments for hemiparetic patients.

Military Strength Training

Used by military special forces for injury prevention and performance optimization. Strength testing identifies residual deficits and predisposition for repeat injury.

Occupational Medicine/Workplace Health 
For many industries today, poor muscular strength constitutes a risk factor for on-the-job injuries, and can predict susceptibility to many diseases.  Today’s workforce is older and more obese – characteristics expected to present increasing injury and illness challenges. Many workers display a loss of up to 30% of their muscle mass as early as age 55 – and may be unable to meet the physical demands of some jobs in as little as five years.

As a result, industry executives require objective tools to determine whether prospective employees possess the muscular strength necessary to safely meet the demands of the positions for which they’ve applied. The Biodex System 4 Dynamometer provides objective, reproducible measures that can be correlated with the physical demands of different jobs, as determined by the Department of Labor.  Such pre-employment testing enables companies to assess whether job applicants will become true assets to their workforce – or present risks of injuries, absenteeism and susceptibility to disease.

Older Adult
Biodex Fall Risk Screening & Condtioning Program has been employed by leading clinics for over ten years. It is the only fall program that incorporates a complete array of objective tests. Isokinetic testing will identify weakness; exercise will improve ankle and leg strength.

Research
The Biodex Multi-Joint System has been used in over 1,000 published studies. Unique capabilities include:

• Integrated Analog/EMG Output Signal Scaling provides real time analog voltage outputs of torque, position and velocity from the dynamometer. Perfect for integration with EMG devices.
• Export Data Parser produces .csv files with preformatted header.

• Curve Analysis allows the user to conduct complete neuromuscular evaluation. 

Combine the art and science of rehabilitation

Based on accepted science, backed by independent studies, supported by clinical protocols and normative data

Featuring six modes of operation, the Biodex System 4 continues to offer pioneering breakthroughs in neuromuscular testing and rehabilitative technology. Biodex assessments of physical impairments provides patients a fast, effective, documented return to function. The Biodex System 4 is unusually sensitive to your patient's limits. Progressive and interactive features keep you in complete control. Dynamic and static muscle loading environments provide unlimited combinations of technique and application.

Isokinetic Resistance Mode

• The Isokinetic Resistance mode for testing and rehabilitation is totally accommodating throughout the entire range of motion. Biodex's unique impact-free acceleration and deceleration eliminates joint trauma, allowing patients to exercise and be tested at more functional speeds. Resistance continuously matches effort, accommodating to variations in patient force output due to weakness, pain or fatigue at specific points in the individual's range of motion.
• Research along with over 30 years of clinical application has demonstrated that isokinetic resistance is a safe, objective means to quantify physical impairments with a high correlation to function. Isokinetic testing is the standard for muscle and joint assessment.
• Applied torque response ensures that the patient's limb velocity increases or decreases in proportion to the torque applied during acceleration and deceleration, enabling neuromuscular control measurements.
• Choose concentric and eccentric contractions to perform isolated polymetric exercises. 

• Concentric torque up to 500 ft-lb (680 Nm) and eccentric torque up to 400 ft-lb (542 Nm) accommodates the demands of high performance athletes and sports medicine researchers.

Reactive Eccentric Mode

• The Reactive Eccentric mode for submaximal neuromuscular re-education in the early phases of rehabilitation
• The System 4 responds only to the patient's force output. To initiate movement, the patient must produce and maintain a pre-determined minimum amount of force. This loads the muscles surrounding the joint, producing a pre- load, thus stabilizing and protecting the joint.
• Eccentric torque up to 400 ft-lb (542 Nm)
• Accommodates the demands of today's athletes and sports medicine researchers.

Passive Motion Mode

• The Passive Motion mode is a multi-function modality. Unique control properties allow for early intervention in all patients throughout all phases of rehabilitation.
• Torque limits can be set as low as .5 ft-lb (.7 Nm). If a torque limit is exceeded during an eccentric contraction, the System stops. Once the patient's torque output drops below the prescribed limit, movement is allowed. This unique capability allows patients to work safely at definitively prescribed sub-maximal force levels while combining isometric, concentric and eccentric contractions for:
  - decreasing joint effusion
  - increasing range of motion
  - developing strength
• Passive speeds can be set as low as .25 degree per second and as fast as 300 degrees per second. The very slow speeds allow for overcoming the natural stretch reflex.
• Biodex software includes specific protocols for active and passive joint repositioning.
• Higher speeds in passive mode are ideal for active assistive exercise.

Isometric Mode

• The Isometric mode is commonly used pre and post operatively or when pain associated with motion is a factor. Isometric contractions are effective at developing strength and decreasing joint effusion while avoiding painful points in the range of motion.
• Biodex software automates the rehab process with automated multiple angle isometric protocols. Work the agonist, antagonist or both muscles at specified joint angles.

Isotonic Mode

• The Isotonic mode allows velocity to vary while providing inertia-free constant force and concentric or eccentric muscular contractions.
• Higher performance:
• Isotonic force to as low as .5 ft-lb (.7 Nm) = 6 inch pound; and as high as 400 ft-lb (542 Nm)
• Allows for functional task simulation when using work simulation tools, e.g. turning a doorknob.
• Because the force is selected, the Isotonic mode also provides protective pre-loading of the joint prior to movement.
• Ideal for work simulation. Constant force muscle loading is considered functional, as natural activities normally involve moving a constant weight object at varying velocities.

Enjoy complete freedom in planning the mode and level of clinician interaction that works best for each patient. Touch panel controls give clinicians the hands-on ability to adjust torque, speed, range of motion and other clinical parameters in real time.

The Biodex System 4 also allows clinicians the option to select automated test and exercise sessions. Any sequence of modes can be employed automatically.

System 4 MVP Patient Positioning System with fixed height, single-chair positioning, fully assisted dynamometer height adjustment, front-to-back chair adjustment and side-to-side dynamometer adjustment.

• Dimensions:
  T-Base with Dynamometer and Positioning Chair: 52" w x 65" d x 60" h (132 x 165 x 152 cm)
• Clinical Data Station: 25" w x 19" d x 41" h (64 x 48 x 104 cm)
• Accessory Cart: 33" w x 20" d x 40" h (85 x 51 x 102 cm)
• Total Operating Floor Space Required: 64 sq. ft. (6 sq. m)
• Clinical Data Station:
  – PC with Windows 10 Enterprise LTSC, Advantage BX™ Software, 22" flat panel touchscreen with integrated speakers.
  – HP InkJet printer (US only).
• Included accessories: ankle, knee, shoulder, elbow and wrist attachments, accessory cart and wall chart.
• Performance:
  – Concentric speed up to 500 deg/sec
  – Eccentric speed up to 300 deg/sec
  – Concentric torque up to 500 ft-lb (680 Nm)
  – Eccentric torque up to 400 ft-lb (544 Nm)
  – Passive speed as low as .25 deg/sec
     • Passive torque as low as .5 ft-lb
     • Isotonic torque as low as .5 ft-lb
• Total Weight: 1,350 lb (612 kg)
• Power: 230 VAC, 50-60 Hz, 8 amps
• Standards:
  IEC 60601-1:2005 (Third Edition) + CORR. 1:2006 + CORR. 2:2007 + A1:2012 (or IEC 60601-1: 2012 reprint)
  ANSI/AAMI ES60601-1:2005 + A1:2012 + C1:2009 and A2:2010
  CAN/CSA-C22.2 No. 60601-1:2014
  IEC 60601-1-2:2014
• Warranty: one year parts and labor
  
  

• Manual, Multi-Joint System – Instructions for Use (Advantage BX Software 5.3X)
• Manual, Biodex System 4 Installation Instructions
• Manual, System 4 PC and Monitor Upgrade

• Video Playlist, Biodex Multi-Joint System Dynamometer: Attachment Set Up & Positioning

Translated Documents:

• Instructions for Use (Advantage BX Software 5.3X), System 4 (French)
     - Translation Certificate
• Instructions for Use (Advantage BX Software 5.2X), System 4 (Chinese)
     - Translation Certificate
• Instructions for Use (Advantage BX Software 5.2X), System 4 (Japanese)
     - Translation Certificate
• Instructions for Use, Addendum (Advantage BX Software 5.2.02), System 4 (Japanese)
    - Translation Certificate
• Instructions for Use (Advantage BX Software 5.2X), System 4 (German)
     - Translation Certificate
• Instructions for Use, Addendum (Advantage BX Software 5.2.02), System 4 (German
     - Translation Certificate

To order, call 1-800-224-6339

Export models available.

Optional:

Replacements: