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Self-contained compression device with cam-movable housing members and method




Title: Self-contained compression device with cam-movable housing members and method.
Abstract: A self-contained compression device and related method for cyclically compressing the limb of a patient to improve blood flow in the limb are disclosed. In one embodiment, the compression device includes a compressive section sized and shaped for extending around a portion of the limb for applying compressive pressure and a housing operatively connected to the compressive section. The housing includes first and second housing members movable relative to each other between contracted and expanded positions. A non-pneumatic mechanical actuator is provided in the housing for cyclically moving the first and second housing members from their contracted position to their expanded position. In one embodiment, the actuator comprises a prime mover and at least one cam movable by the prime mover for effecting relative movement between the first and second housing members. ...


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USPTO Applicaton #: #20100010406
Inventors: Steve Nardi, Jesse E. Denson, Scott Wudyka, Malcolm Bock


The Patent Description & Claims data below is from USPTO Patent Application 20100010406, Self-contained compression device with cam-movable housing members and method.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a divisional of U.S. patent application Ser. No. 11/533,524, filed Sep. 20, 2006, which is hereby incorporated by reference in its entirety.

BACKGROUND

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OF THE INVENTION

This invention relates generally to compression therapy, and more particularly to devices which enhance blood flow to avoid circulation problems, such as deep vein thrombosis (DVT).

Cyclical compression of a body part (e.g., leg) is beneficial to a person who has a blood circulation problem involving poor venous return to the heart. Many devices on the market and in the prior art provide compression by using one or more pneumatic bladders that encircle the leg or other limb(s). The bladders are inflated in a predetermined sequence and to a prescribed pressure at timed intervals. The device that controls the inflation typically employs an air pump or compressor and a number of valves that operate to direct the flow of air to the bladders. Conventional products use a bladder-filled sleeve wrapped around the limb and a tube that connects the bladder(s) to a controller device that resides separately from the patient such as on the footboard of a bed, on the floor, or on a night stand. If the patient must move, the device must be removed. In addition, while the device is on the patient, it is possible that tubes become entangled in the patient's limbs and/or become a nuisance or safety hazard to caregivers and visitors who may be close to the bed.

There is a need, therefore, for an improved compression device.

SUMMARY

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OF THE INVENTION

In general, a compression device of this invention is used for cyclically compressing the limb of a patient to improve blood flow in the limb. The compression device is self-contained and comprises a compressive section sized and shaped for extending generally circumferentially around a portion of the limb for applying compressive pressure to the limb portion, and a housing operatively connected to the compressive section. The housing includes first and second housing members movable relative to each other between a contracted position in which the housing has a first dimension for relaxing pressure on the limb portion, and an expanded position in which the housing has a second dimension greater than the first dimension for compressing the limb portion. A non-pneumatic mechanical actuator is provided in the housing for cyclically moving the first and second housing members from their contracted position to their expanded position. The actuator comprises a prime mover and at least one cam movable by the prime mover for effecting relative movement between the first and second housing members.

In another aspect, this invention involves a method of using a self-contained compression device to cyclically compress the limb of a patient to improve blood flow in the limb. The compression device comprises a compressive section sized and shaped for extending generally circumferentially around a portion of the limb for applying compressive pressure to the limb portion, and a housing operatively connected to the compressive section. The housing includes first and second housing members movable relative to each other between a contracted position in which the housing has a first dimension and an expanded position in which the housing has a second dimension greater than said first dimension. The method comprises the steps of: applying the compression device to the limb such that the compressive section extends circumferentially around said limb portion; and cyclically activating a mechanical non-pneumatic actuator in the housing to move the housing members from the contracted position to the expanded position in a series of cycles to cyclically compress the limb portion. The cyclically activating step comprises moving at least one cam to move the housing members from the contracted position to the expanded position during each of the cycles.

Other objects and features will be in part apparent and in part pointed out hereinafter.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is an elevational view of a compression device of this invention as applied to the limb of a patient (shown in phantom) and showing first and second housing members of the device in a contracted position;

FIG. 2 is a view similar to FIG. 1 showing the housing members in an expanded position for compressing the limb;

FIG. 3 is a perspective view of the housing in its contracted condition;

FIG. 4 is a view similar to FIG. 3 but with the housing members exploded to show an actuator inside the housing;

FIG. 4a is an exemplary block diagram of a control system for controlling operation of one or more compression devices of this invention;

FIG. 5A is an end view of the housing in a contracted position with a portion of the side wall broken away to show a spring arrangement urging the housing toward its contracted condition;

FIG. 5B is a view similar to FIG. 5A but showing the housing in an expanded condition;

FIG. 6 is a schematic view of the actuator and the housing members in their contracted position;

FIG. 7 is a view similar to FIG. 6 but showing the housing members in their expanded position;

FIG. 8 is a perspective view showing the compression device applied to a limb of a patient;

FIG. 9 is a view showing three compression devices of a system of this invention applied to the limb of a patient;

FIG. 10 is a view showing a different embodiment of a compression system comprising an integrated compressive unit and three modules;

FIG. 11 is a schematic view of an integrated compression unit and elements of an integrated control for controlling the operation of the modules of FIG. 10;

FIG. 12 is an elevational view of a different embodiment of a compression device of this invention, comprising a bladder and a mechanical device for cyclically compressing the limb of a patient (shown in phantom), the mechanical device being shown in a contracted condition;

FIG. 12A is a view similar to FIG. 12 showing the mechanical device in an expanded condition;

FIG. 13 is an elevational view of another embodiment of a compression device of this invention, comprising a bladder and a different mechanical device for cyclically compressing the limb of a patient (shown in phantom), the bladder being shown in a contracted condition;

FIG. 13A is a view similar to FIG. 13 showing the bladder in an expanded condition;

FIG. 14 is an elevational view of still another embodiment of a compression device of this invention, comprising a bladder and a different mechanical device for cyclically compressing the limb of a patient (shown in phantom), the mechanical device being shown in a contracted condition; and

FIG. 14A is a view similar to FIG. 14 showing the mechanical device in an expanded condition.




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stats Patent Info
Application #
US 20100010406 A1
Publish Date
01/14/2010
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
/
Drawings
0




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Surgery: Kinesitherapy   Kinesitherapy   Device With Applicator Having Specific Movement   Flexible Membrane Caused To Move By Fluid Pressure   Body Member Enclosing Or Encircling   Pulsating Pressure Or Sequentially Inflatable  

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20100114|20100010406|self-contained compression device with cam-movable housing members and method|A self-contained compression device and related method for cyclically compressing the limb of a patient to improve blood flow in the limb are disclosed. In one embodiment, the compression device includes a compressive section sized and shaped for extending around a portion of the limb for applying compressive pressure and |Tyco-Healthcare-Group-Lp
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