GB2411585A - Valve for inflatable patient supports - Google Patents
Valve for inflatable patient supports Download PDFInfo
- Publication number
- GB2411585A GB2411585A GB0503881A GB0503881A GB2411585A GB 2411585 A GB2411585 A GB 2411585A GB 0503881 A GB0503881 A GB 0503881A GB 0503881 A GB0503881 A GB 0503881A GB 2411585 A GB2411585 A GB 2411585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- patient support
- valve assembly
- inflatable
- deflation
- deflation valve
- 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.)
- Granted
Links
- 238000002680 cardiopulmonary resuscitation Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 4
- 210000003195 fascia Anatomy 0.000 description 13
- 238000002560 therapeutic procedure Methods 0.000 description 3
- 208000004210 Pressure Ulcer Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
- A61G7/05776—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers with at least two groups of alternately inflated chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
- F16K3/08—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages with circular plates rotatable around their centres
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Nursing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Invalid Beds And Related Equipment (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Abstract
A deflation valve assembly (1) for effecting deflation of an inflatable patient support, the deflation valve assembly being integrally fixed to the patient support and comprising rotatable valve means which is adapted to be manually rotated to an open condition or to a closed condition, said deflation valve assembly being adapted to be connected downstream of an air inlet to the inflatable patient support, and in an open condition the valve assembly effects deflation of the patient support for cardio-pulmonary resuscitation.
Description
VALVE FOR INFLATABLE PATIENT SUPPORTS
The present invention relates to valves for inflatable patient supports, and in particular, but not exclusively, to rapid deflation valves for inflatable mattresses.
Inflatable patient supports are used to provide therapy to patients who are immobile for extended periods to prevent pressure ulcers. Such inflatable patient supports often comprise a plurality of cells, with particular groups of the cells being sequentially inflated and deflated from a control unit which comprises a pneumatic pump. In the event of an emergency the mattress needs to be deflated in as short a time as possible so that the patient is on a firm support surface for cardio- pulmonary resuscitation.
Commonly the rapid deflation valve comprises a pull-type valve but this can be inadvertently opened.
The present invention seeks to provide an improved deflation valve for inflatable patient supports, and an inflatable patient support provided with said valve.
According to a first aspect of the present invention there is provided a inflatable patient support comprising a deflation valve assembly, the deflation valve assembly comprising rotatable valve means which is adapted to be manually rotated to an open condition or to a closed condition, wherein in an open condition gas from the patient support is allowed to escape, the deflation valve assembly being provided downstream of a gas inlet of the inflatable patient support.
Preferably the deflation valve comprises an outermost panel component which is provided with gas outlet means, and the arrangement being such that the rotatable valve means is provided inwardly of the panel component such that in an open condition gas from the patient support is allowed to escape through the gas outlet means.
In a highly preferred embodiment the deflation valve assembly is adapted to effect deflation of the patient support for cardio-pulmonary resuscitation.
Preferably the rotatable valve means is provided with aperture means which when said rotatable valve means is in the open condition, is in register with the gas outlet means of the outermost panel component.
In a highly preferred embodiment the deflation valve further comprises an inner support member which is provided with aperture means, the rotatable valve means being interposed between said inner support member and said outer panel, the aperture means of the inner support member adapted to be in fluid communication with the gas stored in the inflatable support and in the open condition the rotatable valve means providing fluid communication between the gas outlet means of the outer panel and the aperture means of the inner support member.
The deflation valve preferably comprises stop means which limits the extent of the rotational movement of the rotatable valve means and thereby defines open and closed conditions.
The deflation device is desirably adapted to be attached to a sidewall of an inflatable mattress patient support.
According to a second aspect of the invention there is provided a deflation valve assembly which is adapted to be integrally fixed to an inflatable patient support, the deflation valve assembly comprising rotatable valve means which is adapted to be manually rotated to an open condition or to a closed condition, said deflation valve assembly being adapted to be connected downstream of a gas inlet to the inflatable patient support.
Where the inflatable patient support is an inflatable mattress the deflation valve is preferably provided on a sidewall of the mattress.
Where the inflatable patient support is provided with a plurality of groups of inflatable cells, and each group being adapted to be inflated and deflated sequentially, a conduit is provided between a respective gas outlet in the deflation valve for each group and respective feed conduit through which gas is fed into a group of cells. Most preferably the deflation valve comprises a respective gas outlet for each group of cells.
One embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which Figure 1 is a perspective view of a deflation valve, Figure 2 is an exploded perspective view of the deflation valve of Figure l, Figure 3 is front elevation of the fascia plate of the deflation valve of Figure 1, Figure 4 is a section A-A of the fascia plate of Figure 3, Figure 5 is a section B-B of the fascia plate of Figure 3, Figure 6 is a front elevation of the rotatable selector of the deflation valve of Figure 1, Figure 7 is a side elevation of the rotatable selector of Figure 6, Figure 8 is a front elevation of the intermediate mounting plate of the deflation valve of Figure 1, Figure 9 is a side elevation of the intermediate mounting plate of Figure 8, Figure 10 is a front elevation of the inner mounting plate, Figure 11 is a side elevation of the inner mounting plate of Figure 10, and, Figure 12 is a schematic view of an inflatable mattress provided with the deflation valve of Figure 1.
With reference to Figures 1 and 2, a deflation valve 1 is shown which comprises an outermost fascia plate 2, a rotatable selector 3, an intermediate mounting plate 4 and an inner mounting plate 5.
The fascia plate 2 is provided with a central aperture 10 and, smaller, surrounding apertures 11. The aperture 10 is dimensioned to receive a grip portion 19 of the rotatable selector 3 whereas the four apertures 11 are air outlet apertures. The fascia plate 2 is also provided with four further apertures 12 which are each located towards a respective corner of the plate. The apertures 12 being adapted to receive screws 13 which connect the various constituent components of the deflation valve 1 together, the mattress material being sandwiched between the plates 4 and 5. \ The fascia plate 2 is provided with indicia 14 and 15 which reads 'OPEN' and 'CLOSED' respectively which serve to indicate the two predetermined positions of the rotatable selector 3.
The rotatable selector 3 comprises a raised central portion 18 and a surrounding annular flange 16. The raised central portion 18 comprises the grip portion 19 which extends substantially diametrically of the raised central portion 18. The annular flange 16 is provided with four equally angularly spaced apertures 17 and four equi-spaced raised lands 19' of sector shape, for co-operation with the respective O-ring seals 32 described hereafter. Furthermore the radially outermost circumference of the annular flange 16 is provided with a recessed portion 20 between angularly spaced end walls 21. The recessed portion 20 is of substantially arcuate profile and is radially inner of the major portion of the circumference of the annular flange 16.
The intermediate plate 4 comprises a central region 22 which is bounded by a wall 23. Four outlet connectors 24 extend rearwardly of the intermediate mounting plate, each of which is provided with a through conduit 25 the forward ends of which are located in the central region 22. Surrounding each end of each conduit 25 there is provided a circular channel which is dimensioned to receive a respective O-ring seal 32. There is also provided in the central region 22 a centrally located through-hole 26. On two opposite sides of the plate 4 there are provided part-circular cut-outs 28 to accommodate the heads of poppers on the side of the mattress. The radially innermost surface of the wall 23 comprises a stop feature 27 which extends generally radially inwardly of the wall 23. Through-holes 29 are provided towards each corner of the intermediate mounting plate with concentric annular formations 30 protruding from the rearward side of the plate.
Turning finally to the inner mounting plate 5 there are provided four through-holes 33, centrally of which there is provided a through-hole 34.
Two part circular cut-outs 35 are provided on opposite sides of the plate in register with cut-outs 28. The rearward surface of the inner mounting plate 5 is provided with four rearwardly extending, internally threaded sleeves 36. Openings 37 to the sleeves 36 are provided on the forward surface of the inner mounting plate.
In an assembled condition the screws 13 connect the fascia plate 2, the intermediate mounting plate 4 and inner mounting plate 5 together through respective holes 12, 29 and 3, the threads of the screws 13 fixedly engaging with the threaded portions of sleeves 36 of the inner mounting plate 5.
The rotatable selector 3 is received in the central region 22 and is urged against the O-ring seals 32, which are located in respective channels 31, by the fascia plate 2. As is evident from Figure 1, the grip portion 19 protrudes through the aperture 10 of the fascia plate l 0, whereas the central raised portion 18 of the rotatable selector 3 is generally flush with outwardly facing surface of said fascia plate.
A screw 40 is urged into a threaded blind bore 41 of the rotatable selector 3, passing through the aperture 26 of the intermediate mounting plate 4.
Finally the outlet connectors 24 of the intermediate mounting plate 4 extend through, and protrude rearwardly of, respective apertures 33 of the inner mounting plate 5.
In use the deflation valve l is integrally attached to a sidewall (not illustrated) of an inflatable mattress 40, shown schematically in Figure 12. Each of the outlet connectors 24 of the intermediate mounting plate 4 are connected to feeder lines 43, 44, 45 and 46 to the cells of the inflatable mattress. More specifically a PVC moulded tee piece (not illustrated) is spurred off each feeder line. A short length of tube is then connected between each moulded tee piece and a respective outlet connector 24.
By way of background the mattress 40 provides pressure relief by the existence of a series of lateral polyurethane cells. A stretchable top cover (not shown) fits over the entire top of the mattress to provide the patient surface.
At start up of a pneumatic pump unit, which is connected to the feeder lines 43, 44, 45 and 46, all cells are inflated until a prescribed pressure is reached. This is typically between 20 and 40mmHg.
As shown in Figure 2, the cells are arranged in groups of four. The mattress 40 comprises thirty-two cells. Counting from left to right of Figure 12, the first, fifth, ninth, thirteenth etc. cells form a first group, the second, sixth, tenth, fourteenth etc cells form a second group, third, seventh, eleventh, fifteenth etc cells forming a third group, and fourth, eighth, twelfth, sixteenth etc cells forming a fourth group. In use the first group of cells deflate initially for a period of 150 seconds, and re-inflate over a period up to 300 seconds. There is then a short equalization period of up to 20 seconds, after which the second group deflates and re- inflates, etc. etc. This may be termed one-in-four cycle therapy.
Inflatable mattresses are also known having one-in two therapy. The operating principle is the same, resulting in the cells alternatively inflating and deflating.
Under normal circumstances the rotatable selector 3 is in the closed position. In this position air in the mattress 40 is prevented from escaping through the deflation valve 1 by the solid portion of the flange 16 of the rotatable selector 3 occluding the ends of the conduits 25 of the intermediate mounting plate 4 and in doing so air is unable to escape through the apertures 11 of the fascia pl ate 2. In the closed position an end wall 21 of the rotatable selector 3 abuts the stop feature 27 of the intermediate mounting plate 4.
In the event that a patient on the mattress 40 needs to receive CPR a clinician can rotate the rotatable selector 3 through approximately 35 so that the other end wall 21 of the rotatable selector 3 abuts the stop feature 27. In this open position the apertures 17 of the rotatable selector 3 are brought into alignment with the conduits 25 of the intermediate mounting plate 4 and with the apertures 11 of the fascia plate 2. In this condition air from the cells of the mattress 40 can escape through the moulded tee pieces, through the connecting tube and then out through the deflation valve 1.
It has been found that the deflation valve 1 provides a deflation time of around fifteen seconds when the mattress 40 is laden with a 65kg patient with a Body Mass Index of 16 kg/m2. Deflation times of around ten seconds are also achievable. By comparison, known deflation valves require around one minute to deflate a mattress.
By providing a designated air outlet for each group of cells the need to provide non-return valves upstream of the deflation valve 1 is obviated.
Inclusion of such non-return valves would add restriction, cost and take up space. Furthermore because the deflation valve l is plumbed directly into feeder lines 43, 44, 45 and 46 there is minimal restriction in that connection, and so allow, to a large extent, such low deflation times to be achieved.
Advantageously, the deflation valve I is difficult to inadvertently urge into an open condition, unlike many known deflation valves. This advantage results from (i) the deflation valve 1 being close, and almost flush, with the mattress side wall and (ii) a relatively stiff rotation action resulting from frictional engagement between the O-ring seals 32 and the inner surface of the rotatable selector 3.
Claims (13)
1. An inflatable patient support comprising a deflation valve assembly, the deflation valve assembly comprising rotatable valve means which is adapted to be manually rotated to an open condition or to a closed condition, wherein in an open condition gas from the patient support is allowed to escape, the deflation valve assembly being provided downstream of a gas inlet of the inflatable patient support.
2. An inflatable patient support as claimed in claim 1 in which the deflation valve assembly is integrally fixed to the inflatable patient to support.
3. An inflatable patient support as claimed in either claim 1 or claim 2 in which the deflation valve assembly is connected to feed lines which feed air from the air inlet to the inflatable patient support.
4. An inflatable patient support as claimed in any preceding claim in which the deflation valve assembly is attached to a sidewall of the inflatable patient support.
5. An inflatable patient support as claimed in any preceding claim in which the deflation valve assembly comprises an outermost panel component which is provided with gas outlet means and the arrangement being such that the rotatable valve means is provided inwardly of the panel component such that in an open condition gas from the patient support is allowed to escape through the gas outlet means.
6. An inflatable patient support as claimed in claim 5 in which the rotatable valve means is provided with aperture means which when said rotatable valve means is in the open condition is in register with the gas outlet means of the outermost panel component.
7. An inflatable patient support as claimed in claim 6 in which the deflation valve comprises an inner support member which is provided with aperture means, the rotatable valve means being interposed between said inner support member and said outer panel, the aperture means of the inner support member adapted to be in fluid communication with the gas stored in the inflatable support and in the open condition the rotatable valve means providing fluid communication between the gas outlet means of the outer panel and the aperture means of the inner support member.
8. An inflatable patient support as claimed in any preceding claim comprising stop means which, in use, limits the extent of the rotational movement of the rotatable valve means and thereby defines the open and closed conditions.
9. An inflatable patient support as claimed in any preceding claim in which the deflation valve assembly is suitable for deflating the patient support sufficiently rapidly so that cardio-pulmonary resuscitation can be performed.
10. A deflation valve assembly which is adapted to be integrally fixed to an inflatable patient support, the deflation valve assembly comprising rotatable valve means which is adapted to be manually rotated to an open condition or to a closed condition, said deflation valve assembly being adapted to be connected downstream of a gas inlet to the inflatable patient support.
11. A deflation valve assembly as claimed in claim 10 which is adapted to effect deflation of the patient support for cardio-pulmonary resuscitation.
12. An inflatable patient support substantially as described herein with reference to the accompanying drawings.
13. A deflation valve assembly substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0404974.8A GB0404974D0 (en) | 2004-03-04 | 2004-03-04 | Valve for inflatable patient supports |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0503881D0 GB0503881D0 (en) | 2005-04-06 |
| GB2411585A true GB2411585A (en) | 2005-09-07 |
| GB2411585B GB2411585B (en) | 2007-07-11 |
Family
ID=32088768
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0404974.8A Ceased GB0404974D0 (en) | 2004-03-04 | 2004-03-04 | Valve for inflatable patient supports |
| GB0503881A Active GB2411585B (en) | 2004-03-04 | 2005-02-25 | Valve for inflatable patient supports |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0404974.8A Ceased GB0404974D0 (en) | 2004-03-04 | 2004-03-04 | Valve for inflatable patient supports |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0404974D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2832337A1 (en) * | 2013-07-31 | 2015-02-04 | Apex Medical Corp. | Air matress device and air discharge valve thereof |
| GB2535342A (en) * | 2014-02-27 | 2016-08-17 | Rober Ltd | Alternating pressure mattress, system and connector |
| CN106555890A (en) * | 2015-09-25 | 2017-04-05 | 台欣国际股份有限公司 | Air inlet switching valve with pressure release regulatory function |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276275B (en) * | 2014-07-21 | 2018-01-05 | 雃博股份有限公司 | Air-cushion device and its gas bleeder valve |
| CN105559996A (en) * | 2014-10-16 | 2016-05-11 | 唐德工业股份有限公司 | CPR (cardiopulmonary resuscitation) active air extraction apparatus of air bed |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5103519A (en) * | 1988-05-09 | 1992-04-14 | Hasty Charles E | Air support bed with patient movement overlay |
| EP0823248A2 (en) * | 1996-08-09 | 1998-02-11 | Pegasus Airwave Limited | Connector, especially for an air-inflatable support for a human or animal body |
| US6061855A (en) * | 1996-11-12 | 2000-05-16 | Gaymar Industries, Inc. | CPR dump manifold |
| WO2001000130A1 (en) * | 1999-06-25 | 2001-01-04 | James Ingrid B | Anti-decubitus pneumatic mattress |
| US6698046B1 (en) * | 2001-03-26 | 2004-03-02 | Sunflower Medical, L.L.C. | Air mattress control unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345630A (en) * | 1993-07-15 | 1994-09-13 | Jack Healy | Quick inflatable air mattress |
| DE19821648C2 (en) * | 1998-05-14 | 2001-04-05 | Klaus Schludi | Adjustable flow restrictor |
| DE10146046A1 (en) * | 2001-09-18 | 2003-04-03 | Rothschenk Gisela | Valve for inflating and emptying airbags protecting transport goods has adjustable rotatable opening and closing mechanism to enable very large air throughput for faster handling times |
| TWI279228B (en) * | 2003-06-18 | 2007-04-21 | Tsung-Hsi Liu | Width-adjustable air mattress bed structure |
-
2004
- 2004-03-04 GB GBGB0404974.8A patent/GB0404974D0/en not_active Ceased
-
2005
- 2005-02-25 GB GB0503881A patent/GB2411585B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5103519A (en) * | 1988-05-09 | 1992-04-14 | Hasty Charles E | Air support bed with patient movement overlay |
| EP0823248A2 (en) * | 1996-08-09 | 1998-02-11 | Pegasus Airwave Limited | Connector, especially for an air-inflatable support for a human or animal body |
| US6061855A (en) * | 1996-11-12 | 2000-05-16 | Gaymar Industries, Inc. | CPR dump manifold |
| WO2001000130A1 (en) * | 1999-06-25 | 2001-01-04 | James Ingrid B | Anti-decubitus pneumatic mattress |
| US6698046B1 (en) * | 2001-03-26 | 2004-03-02 | Sunflower Medical, L.L.C. | Air mattress control unit |
| US20040163181A1 (en) * | 2001-03-26 | 2004-08-26 | Sunflower Medical, L.L.C. | Air mattress control unit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2832337A1 (en) * | 2013-07-31 | 2015-02-04 | Apex Medical Corp. | Air matress device and air discharge valve thereof |
| AU2014204531B2 (en) * | 2013-07-31 | 2015-07-16 | Apex Medical Corp. | Air mattress device and air discharge valve thereof |
| GB2535342A (en) * | 2014-02-27 | 2016-08-17 | Rober Ltd | Alternating pressure mattress, system and connector |
| GB2535342B (en) * | 2014-02-27 | 2017-02-01 | Rober Ltd | Alternating pressure mattress, system and connector |
| CN106555890A (en) * | 2015-09-25 | 2017-04-05 | 台欣国际股份有限公司 | Air inlet switching valve with pressure release regulatory function |
| CN106555890B (en) * | 2015-09-25 | 2019-02-12 | 台欣国际股份有限公司 | Air inlet switching valve with pressure release regulatory function |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0404974D0 (en) | 2004-04-07 |
| GB0503881D0 (en) | 2005-04-06 |
| GB2411585B (en) | 2007-07-11 |
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