US3795242A - Apparatus for applying hydraulic pulsation - Google Patents
Apparatus for applying hydraulic pulsation Download PDFInfo
- Publication number
- US3795242A US3795242A US00300291A US3795242DA US3795242A US 3795242 A US3795242 A US 3795242A US 00300291 A US00300291 A US 00300291A US 3795242D A US3795242D A US 3795242DA US 3795242 A US3795242 A US 3795242A
- Authority
- US
- United States
- Prior art keywords
- frame
- housing
- mechanical
- platen
- reciprocating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H9/00—Pneumatic or hydraulic massage
- A61H9/005—Pneumatic massage
- A61H9/0078—Pneumatic massage with intermittent or alternately inflated bladders or cuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2230/00—Measuring physical parameters of the user
- A61H2230/04—Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
Definitions
- An improved external pressure circulatory assist device of the type comprising a mechanical means for transmitting a pressure pulse to a liquid-filled blanket wrapped about a patients legs, the pulse being in synchronization with the heartbeat of the patient.
- a novel feature of the invention is that wherein air disturbed by the pulsing mechanism is isolated from the gas atmosphere in the vicinity of the aforesaid blanket and is vented to atmosphere, thereby improving the control of the pressure wave. imparted by the circulatory assist action when negative pressure is being used in the immediate environment of the blanket.
- This invention relates to a novel apparatus for assisting blood flow through the circulatory system by the use of external pressure on apatients body.
- the invention particularly relates to a means for obtaining optimum control of the pulsing action when a negative pressure is used adjacent the hydraulic reservoir to which the pulsing action is transmitted.
- Another object of the invention is to provide a circulatory assist apparatus which has an improved mechanical pulsating means incorporated therein.
- a further object of the invention is to provide a novel means for exerting pulsing action on the hydraulic blanket of an external circulatory assist device.
- Still another object of the invention is to provide a novel means for operating a eirculatory assist device.
- Another object of the invention is to provide an improved mechanical pressurizing means which is advantageously enclosed within a rigid housing for an external circulatory assist apparatus.
- the mechanical forces exerted thereby have a minimum tendency to distort the leg unit in such a way as to either require relatively heavy constructiontechniques or, have an undesirable effect on the control of the pressure pulse transmittedv to the legs of a patient.
- FIG. 1 is a plan view ofa mechanical actuating device constructed according to the invention with the top bearing part removed therefrom to better show the structural parts of the apparatus.
- FIG. 2 is a side elevation of the apparatus shown in FIG. 1 with the device in the upward or expanded position.
- FIG. 3 is a side elevation of the apparatus shown in FIG. 2 with the device in a contracted position.
- FIG. 4 is a perspective view of a leg unit of the type in which the mechanical actuating unit of the type shown in FIGS. 1 through 3 is normally contained.
- FIG. 5 is a section of the leg unit of FIG. 4, is somewhat schematic, has the bellows cut away and shows the mechanical actuating unit in place.
- a mechanical actuating means comprises a platen 12 which is pivotally mounted at 14 on one end thereof and is connected to a mechanical linkage system 16 at the other end thereof.
- This platen I2 is actuated by a hydraulic cylinder 18 pivotally anchored at 20 to the frame 22 of the mechanism. Cylinder 18 is also fixed by bolt 24 and yoke 26 to operating shaft 28 of linkage system 16 at the other end thereof.
- Operating shaft 28 is in turn linked to two generally triangular cam bearings 30.
- Cam 30 is mounted for pivotal movement about shaft 32. And thus when the plunger 34 on hydraulic cylinder 18 exerts force on operating shaft 28 the triangular cam is forced to rotate in a clockwise direction about shaft 32.
- FIG. I a flange 44 to which the lower section 42 of bellows 41 is attached.
- Flange 44 is the upper part of a bellows support structure 43which is mounted on bottom plate 46 and with which bellows 41 forms a means to totally enclose the major portion of the volume between bottom of plate 46 and plate 12, thereby forming a housing for linkage system -I6.
- a seal 47 is provided about the aperture through which cylinder 18 passes through bellows mount 43.
- vent 50 An exit path for gas expelled by the bellows is'pro vided by vent 50.
- This arrangement has allowed an improved control to be achieved, especially when the apparatus is operated at subatmospheric pressure, i.e. when it is enclosed within a bag, such as shown at 57 in FIG. 5 on which a vacuum is drawn.
- the linkage- also has been found to be particularly advantageous because it minimizes stresses on the inside of housing leg housing 54 as seen in FIG. 5.
- bottom plate 46 can be much lighter since it only has to tolerate such tensile strength as, for example, that-exerted by the vectors 60 shown in FIG. 2. These forces cause bottom plate 46 to be placed in tension but do not exert any significant bending stresses thereon. Moreover, when the two sections of the leg unit are held down by quick disconnect bolts 55 as seen in FIG. 4 and which screw into rods 56 and 58 as seen in FIG. 2, all the vertical forces tending to separate the top and lower segments of the leg unit are resisted as tensile stresses in rods 56 and 58. Again there is no moment which tends to impart a vertical bending movement at points 64 or 66. It will be noted that the leg sections of housing 54 are adapted to dissipate stresses therein as hoop stresses and thereby minimize any strain from said stresses.
- the housing unit can be made of much lighter material than had been the case with the earlier designs.
- an external circulatory assist apparatus of the type comprising a reciprocating mechanical actuating means adapted to act, in synchronous relationship to the heartbeat of a patient, on a liquid-filled bladder confined in a rigid housing
- said mechanical actuating means includes a means for mechanically isolating, and venting from said housing, gas which is displaced by said actuating means during its reciprocal movement.
- isolation means comprises an enclosed chamber mounted between one side of a reciprocating platen which is acting on said liquid-filled bladder and means to discharge gas from said chamber to outside of said housing chamber.
- said external assist apparatus comprises means to affect subatmospheric pressure in the space within said housing but outside said enclosed chamber.
- external pressure circulatory assist apparatus of the type comprising a reciprocating member bearing against a liquid-filled bladder adapted to enclose a patients legs, said bladder and reciprocating member being enclosed in a rigid housing, the improvement wherein said reciprocating platen is pivotally mounted on a frame for said actuating means near a first end of said frame and pivotally mounted to a mechanical linkage positioned near the other end of said frame and wherein a piston-actuating cylinder is mounted at said first end of said frame, said cylinder forming means to actuate said mechanical linkage to actuate said reciprocating member and thereby dissipating mechanical stresses along the length of said frame and minimizing bending stresses therealong.
- said mechanical linkage comprises l. a generally-triangular cam pivotally mounted to rotate in response to the movement of a pistonactuating cylinder, and 2. a lever arm attached between said cam and said mechanical means, said lever arm forming means to raise said mechanical actuating means upon the rotation of said cam.
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Percussion Or Vibration Massage (AREA)
- Massaging Devices (AREA)
Abstract
Description
Claims (16)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US30029172A | 1972-10-24 | 1972-10-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3795242A true US3795242A (en) | 1974-03-05 |
Family
ID=23158491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00300291A Expired - Lifetime US3795242A (en) | 1972-10-24 | 1972-10-24 | Apparatus for applying hydraulic pulsation |
Country Status (2)
Country | Link |
---|---|
US (1) | US3795242A (en) |
JP (1) | JPS5830055B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5033457A (en) * | 1989-06-23 | 1991-07-23 | Bonutti Peter M | Air assisted medical devices |
US20020107461A1 (en) * | 2000-11-10 | 2002-08-08 | Hui John C.K. | High efficiency external counterpulsation apparatus and method for controlling same |
US6572621B1 (en) | 1992-05-07 | 2003-06-03 | Vasomedical, Inc. | High efficiency external counterpulsation apparatus and method for controlling same |
US20030233118A1 (en) * | 2002-06-13 | 2003-12-18 | Hui John C. K. | Method for treating congestive heart failure using external counterpulsation |
US20050070755A1 (en) * | 1993-05-06 | 2005-03-31 | Zhensheng Zheng | High efficiency external counterpulsation method |
US20060058717A1 (en) * | 2004-09-14 | 2006-03-16 | Hui John C K | External counterpulsation device having a curvilinear bed |
US7048702B2 (en) | 2002-06-13 | 2006-05-23 | Vasomedical, Inc. | External counterpulsation and method for minimizing end diastolic pressure |
US20130261518A1 (en) * | 2012-03-27 | 2013-10-03 | Craig N. Hansen | Body pulsating apparatus and method |
US20160095787A1 (en) * | 2014-10-07 | 2016-04-07 | Circulator Boot Company | Compression Therapy Device Having Mechanical Advantage |
US12029703B2 (en) | 2019-11-27 | 2024-07-09 | Electromed, Inc. | Body pulsating apparatus and method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303841A (en) * | 1964-06-18 | 1967-02-14 | Dennis Clarence | Process and apparatus for pressurizing lower extremities of a patient during ventricular diastole |
US3654919A (en) * | 1970-11-25 | 1972-04-11 | Medical Innovations Inc | Process and apparatus for synchronous assisting of blood circulation |
US3734087A (en) * | 1971-11-11 | 1973-05-22 | Medical Innovations Inc | External pressure circulatory assist |
-
1972
- 1972-10-24 US US00300291A patent/US3795242A/en not_active Expired - Lifetime
-
1973
- 1973-04-20 JP JP48044269A patent/JPS5830055B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303841A (en) * | 1964-06-18 | 1967-02-14 | Dennis Clarence | Process and apparatus for pressurizing lower extremities of a patient during ventricular diastole |
US3654919A (en) * | 1970-11-25 | 1972-04-11 | Medical Innovations Inc | Process and apparatus for synchronous assisting of blood circulation |
US3734087A (en) * | 1971-11-11 | 1973-05-22 | Medical Innovations Inc | External pressure circulatory assist |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5033457A (en) * | 1989-06-23 | 1991-07-23 | Bonutti Peter M | Air assisted medical devices |
US6572621B1 (en) | 1992-05-07 | 2003-06-03 | Vasomedical, Inc. | High efficiency external counterpulsation apparatus and method for controlling same |
US20050070755A1 (en) * | 1993-05-06 | 2005-03-31 | Zhensheng Zheng | High efficiency external counterpulsation method |
US7314478B2 (en) | 2000-11-10 | 2008-01-01 | Vasomedical, Inc. | High efficiency external counterpulsation apparatus and method for controlling same |
US20020107461A1 (en) * | 2000-11-10 | 2002-08-08 | Hui John C.K. | High efficiency external counterpulsation apparatus and method for controlling same |
US6589267B1 (en) | 2000-11-10 | 2003-07-08 | Vasomedical, Inc. | High efficiency external counterpulsation apparatus and method for controlling same |
US20050131456A1 (en) * | 2000-11-10 | 2005-06-16 | Hui John C.K. | High efficiency external counterpulsation apparatus and method for controlling same |
US6962599B2 (en) | 2000-11-10 | 2005-11-08 | Vasomedical, Inc. | High efficiency external counterpulsation apparatus and method for controlling same |
US20030233118A1 (en) * | 2002-06-13 | 2003-12-18 | Hui John C. K. | Method for treating congestive heart failure using external counterpulsation |
US7048702B2 (en) | 2002-06-13 | 2006-05-23 | Vasomedical, Inc. | External counterpulsation and method for minimizing end diastolic pressure |
US20060058715A1 (en) * | 2004-09-14 | 2006-03-16 | Hui John C | External counterpulsation device with multiple processors |
US20060058716A1 (en) * | 2004-09-14 | 2006-03-16 | Hui John C K | Unitary external counterpulsation device |
US20060058717A1 (en) * | 2004-09-14 | 2006-03-16 | Hui John C K | External counterpulsation device having a curvilinear bed |
US20130261518A1 (en) * | 2012-03-27 | 2013-10-03 | Craig N. Hansen | Body pulsating apparatus and method |
US10016335B2 (en) * | 2012-03-27 | 2018-07-10 | Electromed, Inc. | Body pulsating apparatus and method |
US20160095787A1 (en) * | 2014-10-07 | 2016-04-07 | Circulator Boot Company | Compression Therapy Device Having Mechanical Advantage |
US9770385B2 (en) * | 2014-10-07 | 2017-09-26 | Shakam LLC | Compression therapy device having mechanical advantage |
US12029703B2 (en) | 2019-11-27 | 2024-07-09 | Electromed, Inc. | Body pulsating apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
JPS5830055B2 (en) | 1983-06-27 |
JPS4973879A (en) | 1974-07-17 |
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Owner name: INTERMEDICS CARDIASSIST, INC., 240 TARPON INN VILL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CARDIASSIST CORPORATION;REEL/FRAME:004015/0042 Effective date: 19820528 |
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Owner name: INTERMEDICS, INC., INTERMEDICS CARDIASSIST, INC., Free format text: SAID PARTIES RECITES OBLIGATIONS RECITED IN SECURITY AGREEMENT RECORDED SEPTEMBER 17, 1984 REEL 4303 FRAMES 077-127 HAVE BEEN PAID IN FULL ALL;ASSIGNOR:CITIBANK, N.A., INDIVIDUALLY AND AS AGENT FOR BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION, THE CHASE MANHATTAN BANK, N.A., THE FIRST NATIONAL BANK OF CHICAGO, TRUST COMPANY BANK, FIRST FREEPORT NATIONAL BANK OF BRAZOSPORT BANK OF TEXAS;REEL/FRAME:004592/0424 Effective date: 19860502 Owner name: INTERMEDICS, INC., INTERMEDICS CARDIASSIST, INC., Free format text: SECURED PARTY HEREBY RELEASE THE SECURITY INTEREST IN AGREEMENT RECORDED AUGUST 5, 1985. REEL 4434 FRAMES 728-782;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:004592/0394 Effective date: 19860502 Owner name: INTERMEDICS, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP MULTILEASE (SEF), INC.;REEL/FRAME:004576/0516 Effective date: 19860515 |
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Owner name: INTERMEDICS, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MAY PARTNERSHIP, THE, BY: ROLLINS HOLDING COMPANY, INC.;REEL/FRAME:004874/0945 Effective date: 19870112 |