Source: https://patents.google.com/patent/US7846192?oq=5343970
Timestamp: 2018-02-23 19:34:09
Document Index: 732052662

Matched Legal Cases: ['art 36', 'arts 37', 'art 36', 'arts 37', 'art 36', 'arts 37', 'art 36', 'arts 37', 'art 36', 'arts 37']

US7846192B2 - Warming device - Google Patents
US7846192B2
US7846192B2 US11492425 US49242506A US7846192B2 US 7846192 B2 US7846192 B2 US 7846192B2 US 11492425 US11492425 US 11492425 US 49242506 A US49242506 A US 49242506A US 7846192 B2 US7846192 B2 US 7846192B2
US11492425
US20060259104A1 (en )
U.S. patent application Ser. No. 11/583,481, filed Oct. 19, 2006, titled “Multifunction Warming Device with an Upper Body Convective Apparatus”, and published on Apr. 26, 2007 under Publication No. US 2007/0093885;
U.S. patent application Ser. No. 11/801,292, filed May 9, 2007, “Warming Device with Varied Permeability”, and published on Oct. 11, 2007 under Publication No. US 2007/023939;
U.S. patent application Ser. No. 12/011,699, filed Jan 1, 2008, titled “Warming Device” and published on Jun. 11, 2009 under Publication No. US 2009/0149931;
U.S. patent application Ser. No. 12/653,825, filed Dec. 21, 2009, titled “Warming Device Constructions with a Poncho—Type Patient Gown”.
Convective devices that transfer heat to a human body are known. For example, there are devices that receive a stream of warmed pressurized air, inflate in response to the pressurized air, distribute it within a pneumatic structure, and emit the warmed air onto a body. These devices are typically called “thermal blankets”, “convective thermal blankets” or “covers”. Arizant Healthcare Inc., the assignee of this application, makes and sells such thermal blankets under the BAIR HUGGER® brand. One such device is the Model 522 Upper Body Blanket.
For example, a recent invention disclosed in the referenced Publication No. WO 2003/086500 adapts a clinical garment such as a robe or gown to receive a convective warming device in order to warm a person wearing the garment in a clinical setting for comfort and mobility of the person. Arizant Healthcare Inc., the assignee of this application, makes and sells such warming devices under the BAIR PAWS® brand. These devices are intended to warm patients prior to surgery, and there is a need to further adapt such a combination for use perioperatively.
According to Mahoney et al. (Maintaining intraoperative normothermia: A meta-analysis of outcomes with costs. AANA Journal. 4/99;67,2:155-164.), therapeutic warming is employed during at least the intraoperative period in order to prevent or mitigate hypothermia. In fact, it is increasingly manifest that maintenance of normothermia perioperatively enhances the prospects for a quick, successful recovery from surgery. The effectiveness of therapeutic warming depends upon delivery of enough heat to a patient's body to raise the patient's core body temperature to, or maintain it within, a narrow range, typically around 37° C. This range is called “normothermic” and a body with a core temperature in this range is at “normothermia.” Hypothermia occurs when the core body temperature falls below 36° C.; mild hypothermia occurs when core body temperature is in the range of 34° C. to 36° C. Therefore, “perioperative therapeutic warming” is warming therapy capable of being delivered during one or more of the perioperative periods for the prevention or treatment of hypothermia.
When delivered by convective devices, therapeutic warming is distinguished from comfort warming by intended effects and by the parameters of heat delivery that produce those effects. In this regard, a convective warming system typically includes a source of warmed pressurized air (also called a heater/blower unit, a forced air warming unit, a heater unit, etc.), a convective device such as a thermal blanket (which is, typically, inflatable), and a flexible conduit or air hose connecting the heater/blower unit with the thermal blanket. Use of such a system for a particular type of warming requires delivery of warmed air through a convective device at parametric values that achieve a particular objective. For example, for comfort warming, the temperature at the hose end, prior to the air entering the pneumatic convective device, may range from ambient to 42° C. (WO 03/086500 at page 11, lines 24-26). The conditions by which a convective device produces thermal comfort in normothermic individuals at steady state are significantly different from those necessary to treat hypothermia. Typically the conditions for thermal comfort are met in a system with a relatively low capacity heater/blower unit, while those in a therapeutic warming system are achieved with a relatively high capacity heater/blower unit. The different capacities have led to use of air hoses with different capacities, with those delivering air flow for thermal comfort typically having smaller diameters than those serving a therapeutic warming requirement. The result is a divergence of designs leading to installation of different air delivery infrastructures for therapeutic and comfort warming.
Convective apparatus such as thermal blankets have been specifically designed for particular uses. For example, a full body thermal blanket is adapted to lie upon the person and to extend longitudinally along the body of the person in order to cover substantially the person's entire body, from near the ankles or feet up to the neck. A lower body thermal blanket is adapted to lie upon the person and to extend longitudinally along the body of a person in order to cover the person's lower body, from near the ankles or feet up to the waist or pelvis of the person. An upper body thermal blanket has a bow-tie shape that is adapted to lie upon and extend transversely across the upper body of a person in order to cover the person's chest and extended arms. When fed a stream of warmed pressurized air, each of these thermal blankets inflates and distributes the air within itself. The pressurized air flows through apertures on a permeable surface of the thermal blanket which faces the person. These thermal blankets may have one, two, or more inlet ports through which an air hose provides warmed pressurized air from a heater/blower unit. The construction of thermal blankets is well understood. Examples of specific constructions are given in U.S. Pat. No. 5,620,482, 5,443,488, 5,360,439, and 5,304,213. See also U.S. Pat. No. 5,974,605.
The convective apparatus 15 has multiple sections. A “section” of the convective apparatus 15 is a portion or division of the convective apparatus 15 that may be inflated and operated separately from any other section of the convective apparatus 15. For example, the convective apparatus 15 has a section 32 and a section 42. The section 32 may be inflated and operated separately from the section 42, and the section 42 may be inflated and operated separately from the section 32. The section 32 has an inlet port 34, an elongate transverse part 36, and a plurality of elongate parts 37 that connect perpendicularly to the transverse part 36. Each of the two outermost elongate parts 37 transitions through an outward 90° bend to a sleeve portion 38. Each sleeve portion 38 is in a respective portion 29 of the convective apparatus 15. Although one inlet port 34 is illustrated in the section 32, one or more additional inlet ports may be provided for convenience. Unused inlet ports are sealed or closed by known means to prevent air escaping therethrough. Preferably the inlet port 34 is provided through the side of the convective apparatus 15 which is not visible in this figure; it may also be provided through an edge of the convective apparatus 15. The inlet port 34 may comprise a collar 34 a of stiff material with an opening 34 b to receive the nozzle of an air hose, or it may comprise a sleeve of material, or any other equivalent structure. The space in the transverse part 36 is in fluid communication with the spaces in the elongate parts 37 so that pressurized air flowing through an inlet port into the transverse part 36 flows also into the elongate parts 37, thereby inflating the section 32. The surface of the section 32 which is visible in FIG. 2, including the surfaces of the transverse part 36 and the elongate parts 37, is permeable, permitting pressurized air that is flowing into and inflating the section 32 to be expelled toward the interior of the clinical garment 13.
the convective apparatus including a first, dog-bone shaped section with at least one inlet port to provide comfort warming by convection and a second section framing the dog-bone shaped section with at least two inlet ports to provide therapeutic warming by convection.
3. The warming device of claim 2, wherein the first section includes one inlet port.
4. The warming device of claim 3, wherein the second section includes two inlet ports.
5. The warming device of claim 4, wherein the inlet port of the first section having a dimension to accept a warming hose nozzle of a first diameter and the two inlet ports of the second section having dimensions to accept a warming hose nozzle of a second diameter larger than the first diameter.
6. The warming device of claim 5, further including means for securing the convective apparatus to a person.
7. The warming device of claim 6, wherein the means include double-sided adhesive.
8. The warming device of claim 1, further including an aperture in the clinical garment to the inlet port of the first section.
9. The warming device of claim 8, further including respective apertures in the clinical gown to the two inlet ports of the second section.
11. A warming device, comprising:
a rectangular convective apparatus supported on the inside surface; and
the convective apparatus including separately-inflatable sections, a first section having upper and lower transverse parts, an elongate part joining the transverse parts, and an inlet port, and a second section framing the first section and having two inlet ports.
12. The warming device of claim 11, wherein each section includes a permeable surface facing the interior of the clinical garment.
13. The warming device of claim 12, wherein the first section has a dog bone shape.
14. The warming device of claim 13, wherein the inlet port of the first section having a dimension to accept a warming hose nozzle of a first diameter and the two inlet ports of the second section having dimensions to accept a warming hose nozzle of a second diameter larger than the first diameter.
15. The warming device of claim 14 further including an aperture in the clinical garment to the inlet port of the first section.
16. The warming device of claim 15, further including respective apertures in the clinical gown to the two inlet ports of the second section.
17. The warming device of claim 14, further including means for securing the convective apparatus to a person.
18. The warming device of claim 17, wherein the means for securing include double-sided adhesive.
19. The warming device of claim 16, wherein each inflatable includes a permeable surface facing the interior of the clinical garment.
20. The warming device of claim 19, wherein the clinical garment includes a reclosable slit.
US11492425 2004-12-07 2006-07-25 Warming device Active 2029-10-02 US7846192B2 (en)
US11006491 US7364584B2 (en) 2004-12-07 2004-12-07 Warming device
US11492425 US7846192B2 (en) 2004-12-07 2006-07-25 Warming device
CA 2658380 CA2658380C (en) 2006-07-25 2007-06-01 Warming device
PCT/US2007/013073 WO2008013603A1 (en) 2006-07-25 2007-06-01 Warming device
EP20070795671 EP2043571B1 (en) 2006-07-25 2007-06-01 Warming device
US12925445 US8070787B2 (en) 2006-07-25 2010-10-21 Warming device
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US12925445 Continuation US8070787B2 (en) 2004-12-07 2010-10-21 Warming device
US20060259104A1 true US20060259104A1 (en) 2006-11-16
US7846192B2 true US7846192B2 (en) 2010-12-07
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US11492425 Active 2029-10-02 US7846192B2 (en) 2004-12-07 2006-07-25 Warming device
US12925445 Active US8070787B2 (en) 2004-12-07 2010-10-21 Warming device
US13200966 Active US8257415B2 (en) 2004-12-07 2011-10-05 Warming device
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CA (1) CA2658380C (en)
EP (1) EP2043571B1 (en)
WO (1) WO2008013603A1 (en)
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PANSER, CAROL J.;ANDERSON, THOMAS P.;REEL/FRAME:018055/0482