Activator Methods International, Ltd.

Activator Methods, Inc.

Other

Kinex Iha Corp.

Arlan W Fuhr

Tony S Keller

Michael Liebschner

Yani Deros

Craig Charles Ovans

James B Lehneman

Christopher J Colloca

Joe Morin

Stephen C Tsai

Warren C Lee

Joe Monin

A portable battery power operated chiropractic adjusting instrument, manipulator or thruster for applying a selectable adjustment energy impulse to a patient through a plunger having a resilient or cushioned head with the energy impulse applied to the plunger being supplied by a solenoid. The adjusting instrument can have annunciators or indicators for preload, readiness to operate, level of energy impulse and the like. The power source can be an internal rechargeable battery or removable rechargeable battery pack.

Chiropractic adjusting instrument system and method

Chiropractic adjustor system and method

Medical device

Portable chiropractic adjustor

An improved chiropractic adjusting instrument is provided for use in spinal manipulative therapy and for exciting a human spine at preselected resettable frequencies within the range of its natural frequency. The improvement comprises a preloaded body contact thrust member.

Chiropractic adjusting instrument

Studies investigating posteroanterior (PA) forces in spinal stiffness assessment have shown relationships to spinal level, body type, and lumbar extensor muscle activity. Little objective evidence is available discerning variation in PA stiffness and its clinical significance. The aim of this prospective clinical study was to determine the stiffness index and neuromuscular characteristics of the asymptomatic and symptomatic low back. Twenty-two subject underwent physical examination and completed outcome VAS, Oswestry, and SF-36 questionnaires. A hand-held spinal manipulation instrument, equipped with a load cell and accelerometer was used to deliver high rate (<0.1 sec) PA manipulative thrusts (450 N) to several common spinal landmarks including the posterior superior iliac spine (PSIS), sacral base, and L5, L4, L2, T12, T8 spinous (SP) and transverse processes (TP). Surface, linear enveloped, electromyographic (sEMG) recordings were obtained during the trusts from electrodes (8 leads) located over the L3 and L5 erector spinae. The accelerance (peak acceleration/peak force, kg ) or stiffness index and composite sEMG response was calculated for each of the trusts. Significantly increased SP stiffness (7.0 kg ) (P<0.05) and a more positive sEMG response was found in subjects with frequent or constant LBP symptoms in comparison to SP stiffness (6.5 kg ) of subjects with lesser symptom frequency. A positive sEMG response was associated with a significant increase (P<0.05) in the TP stiffness response to PA thrusts in comparison to negative neuromuscular responders. The average SP stiffness was 6.6% greater (P<0.05) and 19.1% greater (P<<0.001) than the average SI stiffness and average TP stiffness, respectfully.

Neuromuscular reflex assessment method

An improved chiropractic adjusting instrument is provided for use in spinal manipulative therapy and for exciting a human spine at preselected resettable frequencies within the range of its natural frequency. The improvement comprises providing a repositionable and resettable shaped mass adjacent to the thrust element; a longitudinally shiftable and rotatable sleeve portion on the shaped mass enables setting the frequency to a predetermined number of preselected settings that are easily and positively fixed so that inadvertent changes in frequency will not occur in use.

Force applying end of a chiropractic adjusting instrument including body contact member and shank

Handle end of chiropractic adjusting instrument

A system for obtaining biomechanical data for the cervical spine of a subject is described. The system includes a display showing a figure representative of the subject. The figure may be displayed in substantially real time relative to the subject's movement The figure may be viewed from a selected one of a plurality of views.

Apparatus for gathering biomechanical parameters

A non-invasive method for determining the dynamic biomechanical characteristics (frequency response functions and natural frequency) of a musculoskeletal structure is provided. The method generally comprises exciting the musculoskeletal structure over a broad range of frequencies with a low amplitude, high velocity impulsive input force, measuring the input force with a force transducer, detecting the output motion response with an output transducer, processing input force and output response data into time-signal histories with a data acquisition and analysis means or digital computer, transforming the time-signal histories from the time domain to the frequency domain by applying Fourier analysis; and calculating a frequency response function and the natural frequency from the input force and dynamic output response time-signal histories. Having identified the natural frequency of the musculoskeletal structure, the clinician can then mobilize the structure at that frequency in order to maximize the effectiveness of spinal therapy. A hand-held, manually operated impact device for delivering a near optimal, low amplitude, high velocity, impulsive input force over a broad range of frequencies and characterized by a generally half-sinusoidal waveform is also provided.

Method for determining the dynamic biomechanical characteristics of a

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Phoenix, AZ, United States of America

Arlan W Fuhr