US20140047986A1 - Systems and methods for blood recovery from absorbent surgical materials - Google Patents
Systems and methods for blood recovery from absorbent surgical materials Download PDFInfo
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- US20140047986A1 US20140047986A1 US13/966,906 US201313966906A US2014047986A1 US 20140047986 A1 US20140047986 A1 US 20140047986A1 US 201313966906 A US201313966906 A US 201313966906A US 2014047986 A1 US2014047986 A1 US 2014047986A1
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- basin
- blood
- assembly
- absorbent material
- wash solution
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/02—Blood transfusion apparatus
- A61M1/0281—Apparatus for treatment of blood or blood constituents prior to transfusion, e.g. washing, filtering or thawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/06—Cleaning involving contact with liquid using perforated drums in which the article or material is placed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry
- D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and rotating or oscillating about a vertical axis
Definitions
- FIG. 3 s a system for extracting blood from an absorbent material according to one embodiment.
- a user places absorbent materials used during a surgical procedure, and having blood soaked therein, into the second basin 402 .
- the user can optionally place the retaining ring 450 atop the absorbent materials 420 to keep them from moving about the basin during rinsing.
- the user can then fill the first and second basins 401 , 402 , respectively with rinse solution from the rinse solution reservoir 430 until the level of the rinse solution is above the collection bowl 435 of the pump 437 .
- the user can then activate the pump 437 , which causes rinse solution to be expelled from the multi-output port assembly 439 in a substantially horizontal direction, as illustrated.
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- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Systems and methods are described for salvaging red blood cells from patients during a surgical procedure. In one general aspect, a system is described for extracting blood from blood-soaked absorbent surgical materials such as surgical sponges, gauze, tape, and the like. The collected blood and fluids from these materials can be transferred to a cell salvage machine for harvesting viable red blood cells for autotransfusion.
Description
- This application claims the benefit of Provisional Patent Application Ser. No. 61/683315, entitled “SYSTEMS AND METHODS FOR BLOOD RECOVERY FROM ABSORBENT SURGICAL MATERIALS” filed on Aug. 15, 2012, to which priority is claimed pursuant to 35 U.S.C. §119(e) and which is hereby incorporated herein by reference in its entirety.
- TECHNICAL FIELD
- This disclosure relates to systems and methods for recapture of blood cells for autotransfusion during surgical procedures.
- Autotransfusion is a practice used in a surgical environment in which a person receives their own blood for a transfusion, instead of banked donor blood. This process can reduce the risk of infection from banked blood supplies such as HIV, hepatitis C, cytomegalovirus, bacterial contamination and other transmissible infections and is commonly used in intraoperative and postoperative situations where the use of homologous blood is contraindicated. Transfusion with banked blood supplies can increase the risk of acute or delayed hemolytic reactions, allergic reactions, post-transfusion purpura and transfusion-associated acute lung injury (TRALI). In addition, some patients refuse transfusion with banked blood due to philosophical or religious reasons.
- The use of autotransfusion can be particularly beneficial where the patient is at risk of losing one or more units of blood during surgery, in cases involving rare blood types, or where the risk of infectious disease transmission is high.
- Certain devices are capable of collecting blood from the surgical field, separating viable red blood cells from plasma, platelets, white cells, anticoagulants, and other substances, and re-introduce the red blood cells into the patient. One such device is produced by Haemonetics Corp. of Braintree, Mass., and sold under the “Cell Saver”™ brand.
- In one exemplary aspect, systems and methods are described for improving salvage of a patient's red blood cells during surgical procedures. In one embodiment, an assembly including a basin is configured to receive blood-soaked absorbent materials used in surgery, e.g., sponges, gauze, and the like; the basin is further configured to collect blood from the absorbent materials safely and efficiently, so that the extracted blood can be transferred to a device that separates red blood cells from the other liquids and substances.
- The systems and methods described herein provide certain distinct advantages. One advantage includes the ability to salvage blood cells from absorbent materials used during surgery that might otherwise be discarded. Another advantage includes providing a safe method for extracting blood from absorbent materials used during surgery wherein the risk of transmitting a blood-borne disease to surgical staff is minimized. Another advantage includes providing a system for safely disposing of blood-soaked absorbent materials as an alternative to discarding the materials in a trash basin. Yet another advantage includes improvement in the accuracy of determining patient blood loss during surgery. Other advantages will be apparent to those skilled in the art of surgery and medical devices for salvaging blood.
- Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of any described embodiment, suitable methods and materials are described below. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.
- The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description and claims.
- The present embodiments are illustrated by way of the figures of the accompanying drawings in which like references indicate similar elements, and in which:
-
FIG. 1 is a system for extracting blood from an absorbent material, according to one embodiment; -
FIG. 1A is a system for extracting blood from an absorbent material according to one embodiment; -
FIG. 2 is a system for extracting blood from an absorbent material according to one embodiment; and -
FIG. 3 s a system for extracting blood from an absorbent material according to one embodiment. -
FIG. 4 is a system for extracting blood from an absorbent material using cyclonic action according to one embodiment. - In one exemplary aspect, systems and methods are provided for salvaging a patient's blood cells from blood-soaked absorbent materials used during surgery. In the description that follows, absorbent materials can include, without limitation, sponges, gauze, tape, cloth, felt, or any other material capable of absorbing blood or bodily fluids, including materials made from natural or synthetic fibers, or a blend of both. Two exemplary absorbent materials are Cottonoid™, provided by Codman and Shurtleff, Inc., Raynham, Mass., USA; and Spetzler Nemo Patties, provided by OMT, LLC, Ft. Lauderdale, Fla., USA. Generally, the disclosed systems and methods provide the ability to extract blood from blood-soaked surgical materials and transport the blood to a cell salvage machine such as a Cell Saver™ device.
-
FIG. 1 is asystem 100 for extracting blood from an absorbent material, according to one embodiment. Thesystem 100 includes abasin 110 having a fixed, perforatedshelf 120 arranged at a height hs above thebasin floor 112. During use, the perforatedshelf 120 can support absorbent materials such as thesponges 125 illustrated inFIG. 1 . In a preferred embodiment, the perforatedshelf 120 can be perforated stainless steel, although other suitable materials can be used, including, but not limited to plastics, aluminum, galvanized steel, or fabrics. In one embodiment, shelf legs can support theperforated shelf 120 above thebasin floor 112. (See, e.g., the embodiment ofFIG. 2 .) In another embodiment, thevertical wall 111 of thebasin 110 can include an interior circumferential notch configured to receive and support theperforated shelf 120. In one embodiment, thebasin 110 can be formed from two halves that can be disassembled and re-assembled so that components of thesystem 100 can be washed and sterilized for repeated use. - In this embodiment, the
system 100 further includes aplunger plate 115 integral with avertical handle member 117 which itself is integral with ahorizontal handle member 119. Theplunger plate 115 can be a solid or porous plate having a diameter substantially equal to, or slightly less than the inner diameter of thebasin 110 to allow theplunger plate 115 to be shifted vertically within thebasin 110 during use, as described in greater detail below. Theplunger plate 115 can be of a desired thickness; however, thinner plates can allow for tilting of theplate 115 within thebasin 110, while thicker plates may reduce tilting. Theplunger plate 115 can be removed completely from within thebasin 110 as illustrated by the double-headed arrow inFIG. 1 so that absorbent materials can be placed in thebasin 110 during use. - In this embodiment, during use, blood-soaked materials such as the illustrated
sponges 125 can be placed on theperforated shelf 120 within thebasin 110. Theplunger plate 115 can be applied with a downward shifting force upon thesponges 125 to causefluids 126 retained therein to be squeezed out and collected in thelower portion 140 of thebasin 110. - In this embodiment, a
tube 130 is configured to transport the fluid collected in thelower portion 140 of the basin to a cell salvage machine. In one embodiment, this can be accomplished using a vacuum that drawsfluid 126 from the lower portion of thebasin 140 to the cell salvage machine. In another embodiment, thesystem 100 can be placed above a cell salvage machine so that any fluids collected in thebasin 110 are transported to the cell salvage machine under the influence of gravity. It will be understood that the illustrated placement of thetube 130 inFIG. 1 is one of many options that will be apparent to those skilled in the relevant arts, and that other configurations may provide certain advantages. For example, thetube 130 can be centrally-located beneath thebasin 110 in a vertically-oriented manner (shown as a dashed line inFIG. 1 to illustrate one alternative approach). In one embodiment, thebottom portion 140 of the basin can have a conical shape leading to a centrally-located outlet port. (See, e.g., the embodiment ofFIG. 2 .) Such an alternative construction can be beneficial in collecting a maximum amount of blood and fluids from thebasin 110. - In this and other embodiments, the
system 100 can be configured to providerinse solution 145 to the absorbent materials, e.g., thesponges 125 illustrated inFIG. 1 . Therinse solution 145 can be applied to the absorbent materials to assist in extracting blood and other fluids alone, or in combination with the application of downward extraction pressure previously described. In the embodiment shown, a rinsesolution 145 can be flowed through atube 135 into thehorizontal handle member 119, which, in such an embodiment, would be hollow. Thehorizontal handle member 119 can be coupled to thevertical handle member 117, also hollow in such an embodiment, to allow the rinsesolution 145 to be flowed to theplunger plate 115. The plunger plate can include radially-extending passages or channels that disperse the rinsesolution 145 across the surface of theplunger plate 115, and theplunger plate 115 can be configured to evenly disburse the rinsesolution 145 to the absorbent materials below, as illustrated inFIG. 1 . In one embodiment, theplunger plate 115 can be configured similar to a shower head, where rinsesolution 145 can be introduced to theplunger plate 115 via thevertical handle member 117 and then dispersed to produce a shower-like effect as illustrated. - In this embodiment, the
system 100 can include a trigger mechanism for controlling the flow of rinsesolution 145 by a user. For example, thesystem 100 can include a thumb switch or lever that allows a user to flow rinse solution on demand. As is known in the art, it can be beneficial when using cell salvaging machines to minimize the amount of rinse solution introduced into the machine. Thus, in one approach, a user can extract a majority of blood and other fluids from the absorbent materials using the downward shifting force previously described, and then apply a small or desired amount of rinse solution to extract remaining blood and other fluids. - In this and other embodiments, the rinse solution can be formulated according to user preference. For example, a rinse solution can be a saline solution. In another example, the rinse solution can include one or more anticoagulants such as citrates, heparin and its derivatives, coumarins, acenocoumarol, phenprocoumon, atromentin, phenindione, among others.
- It will be understood that various other substitutions and alternatives can be used to provide the capability of rinsing absorbent materials within the
basin 110. For example, a spigot (not shown inFIG. 1 ) can be integral with, or removably attached to an upper portion (113) of thebasin 110 which can be selectively controlled by a user to flow rinse solution over the absorbent materials. In one alternative approach, a syringe can be used. - In this and other embodiments, the
system 100 can be configured to allow measurement of collected blood and other fluids from the absorbent materials. An accurate determination of blood loss during surgery can be an important factor in patient care, as is well known in the surgical arts. Thus, in this and other embodiments, thebasin 111 can have, for example, graduated markings allowing a user to visualize and measure blood and fluids collected from the absorbent materials. The graduated markings can be placed, e.g., on the side of thebasin 110 beginning at the bottom portion (140) of the basin and extending vertically, toward the top portion (113) of thebasin 110. - Referring now to
FIG. 1A , in this and other embodiments, thebasin 110 can include anintegral measurement tube 141 capable of providing an accurate measurement of collected blood andfluids 145 from thesponges 125. In this embodiment, themeasurement tube 141 can have a small inner diameter, e.g., 1 cm, 2 cm, 3 cm, etc., and is in fluid communication with the bottom portion (140) of thebasin 110. As blood andother fluids 126 are extracted from thesponges 125 and collected in thebottom portion 140, the blood and other fluids fill themeasurement tube 141 accordingly. Themeasurement tube 141 can include graduated markings to indicate, through appropriate calibration, if necessary, the approximate volume of blood andother fluids 126 collected in thebottom portion 140 of thebasin 110. In this example, themeasurement tube 141 includes markings for 10, 20, 30, . . . 100 milliliters (mL). - Referring now to
FIG. 2 , a system 200 for extracting blood from an absorbent material is shown, according to one embodiment. Similar to the embodiment illustrated inFIG. 1 , the system 200 includes abasin 210 having aconical bottom portion 250, aporous shelf 220, and aplunger plate 215. In this embodiment, theporous shelf 220 is supported vertically above theconical bottom portion 250 by a plurality of triangular-shapedstands 230, although any other method or material can be used for the same or similar purpose. The porous shelf is configured to hold absorbent materials,sponges 225 in this example, containing blood or other bodily fluids, e.g., collected during surgery. - In this embodiment, the
basin 210 includes an elongate, exteriorly-threadedrod 270 extending vertically from the apex 231 of theconical bottom portion 250 through theporous shelf 220 as illustrated. Theplunger plate 215 includes an aperture located at the origin (i.e., the center of the circular plate). Ahollow rod 217 includes matching interior threads and is substantially centered over the aperture of theplunger plate 215 so as to threadingly receive therod 270. Rotation ofhandle 219 causes threading of thehollow rod 217 onto therod 270 and brings theplunger plate 215 into a substantially confronting relationship with theporous shelf 220 to squeezeblood 226 and other fluids from the absorbent materials. In this embodiment, theblood 226 and other fluids are collected by theconical bottom portion 250 and directed under gravitational influence toward an outlet port (not shown inFIG. 2 for clarity). The output port is connected to a tube 260 configured to carry theblood 226 and other fluids to a cell salvaging machine. - In this embodiment, a user can extract blood and other fluids from the absorbent materials, e.g.,
sponges 225, by placing the absorbent materials upon theporous shelf 220, arranging the plunger plate andhollow rod 217 so that thehollow rod 217 can be threaded onto therod 270, then turning thehandle 219 such that the plunger plate is driven down upon the absorbent materials, squeezing absorbed substances therefrom. - The system 200 can include features of other embodiments described herein. For example, the system 200 can include a rinse feature similar to that described with respect to
FIG. 1 , to aid in extracting a maximum amount of blood or other absorbed substance within the absorbent materials. - Blood and bodily fluids can be extracted from absorbent materials used during surgery by a variety of methods. For example, absorbent materials can be spun so that absorbed fluids are extracted by centrifugal forces, shaken, vibrated, placed under vacuum, or any other method.
- Referring now to
FIG. 3 , asystem 300 for extracting blood and other bodily fluids from absorbent surgical materials is shown according to one embodiment. In this embodiment, thesystem 300 includes acylindrical basin 310 having acircumferential side wall 311, afloor 309, and atop portion 308 which is open so as to allow absorbent materials,sponges 325 in this example, to be placed within thebasin 310. - In this embodiment, the
system 300 includes arotatable basket 350 configured within thebasin 310 so as to allow blood and other materials absorbed in absorbent materials to be extracted using centrifugal force. In this embodiment, therotatable basket 350 includes porous side walls and a porous bottom so thatdroplets 342 of blood and other materials can escape thebasket 350 and collect on theside wall 311 andfloor 309 of thebasin 310 when the basket is spun. The collectedblood 320 can be evacuated from thebasin 310 via a tube 352 that, in a preferred embodiment, leads to an inlet port of a cell salvage machine (not shown inFIG. 3 ). - In this embodiment, the
system 300 includes amotor 360, which can be, e.g., a variable-speed electric motor, configured to rotate ashaft 370 that is integral with, or attached to the floor of thebasket 350 as illustrated. It will be understood that other configurations and motorized assemblies can be used for the purpose of spinning thebasket 350 with sufficient speed to cause blood and other materials within the absorbent materials to be extracted by centrifugal force. Similar to other embodiments, the system further includes avolume gauge 341 for accurately determining the volume of blood and other fluids collected (indicated by the fluid at the bottom of thebasin 310, reference numeral 320), which has been described herein. - In this embodiment, the
system 300 includes alid 312 configured to sealingly engage with theupper portion 308 of thebasin 310 so as to reduce the likelihood of blood and other substances splashing out or otherwise escaping thebasin 310 when thebasket 350 is spinning In this embodiment, thelid 312 is hingedly attached to theside wall 311, allowing the lid to be opened and closed as indicated by the double-headed arrow. Thelid 312 further includes alatch member 314 configured to lockingly engage acomplimentary recess 315 in theside wall 311 to keep the lid closed when desired, e.g., when the basket is spinning - As is known in the art, healthy red blood cells can be damaged relatively easily from the effects of applied mechanical force or pressure. Thus, in some embodiments, it can be advantageous to spin the
basket 350 at a slow rate to reduce hemolysis. Under normal operating circumstances, however, it is advantageous to re-introduce blood cells harvested from the operating field in a timely manner. To address these issues, thesystem 300 can be configured so that thebasket 350 spins at an appropriate rate to slowly extract blood from absorbent materials used during surgery while minimizing hemolysis. In one embodiment, thelid 312 of thesystem 300 can include a splash-proof aperture that allows blood-soaked absorbent materials used during surgery to be placed into thebasket 350 while the basket continues to spin. For example, thelid 312 can be made of a resiliently flexible polymer or plastic material and include a pattern of slits that allows a portion of the lid to flex outwardly so that sponges, gauze, and other absorbent materials can be passed through the lid without requiring the lid to be opened. - In another example, the
lid 312 can include an aperture which can be opened and closed using, e.g., a slidable tab. In a preferred embodiment, the aperture can be positioned on thelid 312 above the center of thebasket 350 so that absorbent materials can be introduced into the basket without requiring opening of the lid. - In yet another example, the
system 300 can include a resiliently-flexible, or spring-tensioned partition, e.g., a thin, plastic or metal body, positioned between thelid 312 and thebasket 350. The partition can reversibly shift between a first position, where the partition is substantially planar-parallel to the lid when closed, thereby blocking blood expelled from the basket from escaping thebasin 311, and a second, angled position, that allows absorbent materials to fall into thebasket 350. The aforedescribed embodiments and examples can reduce the likelihood of doctors, nurses, and operating room technicians being exposed to blood and are equally applicable to other embodiments described herein. - Temperature control of blood salvaged from absorbent materials using the systems described herein can be achieved by a variety of methods. In one example, the basin (e.g., basin 310) can include a temperature control assembly that includes heating or cooling elements and thermocouples or other sensors for measuring the temperature of collected blood and
fluids 320. - In one general aspect, blood cells can be washed from absorbent materials using a wash solution such as heparinized saline, and the blood cells can subsequently be separated from the wash solution using cyclonic action. In general, cyclonic action can cause blood cells to collect or settle at the bottom of a vessel, where they can be collected in a more concentrated form.
- Referring now to
FIG. 4 , asystem 400 for extracting blood and other bodily fluids from absorbent surgical materials using cyclonic action is shown according to one embodiment. In this embodiment, thesystem 400 includes afirst basin 401 capable of at least partially housing a smaller,second basin 402. Thesecond basin 402 can be porous throughout, indicated by the illustrative set of pores 405 (the rest of the pores are not shown inFIG. 4 for clarity). In this embodiment, thesystem 400 can use cyclonic action of a wash solution to both rinse blood cells from absorbent materials, e.g.,sponges 420, and separate blood cells from the rinse solution. In this embodiment, a rinse solution such as heparinized saline solution can be introduced into thefirst basin 401 or thesecond basin 402 under pressure and in a substantially horizontal flow direction so as to create a cyclonic vortex of the rinse solution. - In this embodiment, a rinse
solution reservoir 430 is configured to fill thefirst basin 401 via alumen 431 originating from the reservoir.Fluid pump 437 includes anelongate inlet tube 436 that extends in a generally vertical direction from the pump and terminates with acollection bowl 435 which serves as a fluid intake port for thepump 437. In some embodiments, thecollection bowl 435 can be configured so that it floats just under the surface of the rinse solution as illustrated inFIG. 4 ; this can allow the pump to circulate rinse solution substantially free of blood cells or other substances. In this embodiment, the fluid output of thepump 437 is directed into amulti-output port assembly 439. Theassembly 439 is configured to direct the flow of rinse solution in a substantially horizontal direction so as to create cyclonic flow in the first (401) or second (402) basin, or both. - In this embodiment, the
second basin 402 includes a cylindrically-shapedpillar 410 configured to assist in creating cyclonic flow of the rinse solution; however, such structure can be omitted in alternative embodiments. In this embodiment, aporous ring 450 having a central aperture can be configured to assist in reducing movement of the absorbent materials during rinsing. Theporous ring 450 can have a diameter slightly less than the diameter of the opening of thesecond basin 402, and an aperture diameter slightly greater than the cross-sectional diameter of thepillar 410, so that thering 450 can be slidingly placed within thesecond basin 402. In a preferred embodiment, thering 450 can slide down thepillar 410 to thebottom portion 411 of the basin to rest upon the absorbent materials (sponges 420 in this example). The pressure of thering 450 against the absorbent materials can aid in squeezing out blood cells, and additionally keep the absorbent materials from moving about within the cyclonic flow of the rinse solution, when activated. In this embodiment, the floor of thesecond basin 402 includespins 480 oriented at an angle into the cyclonic flow direction; thepins 480 can catch on the absorbent materials and further assist in reducing their movement about thebasin 402. - In this embodiment, the
second basin 402 can include one or more channels, e.g.,channels wall 410 of the basin that provide a substantially unidirectional exit flow from thesecond basin 402 into thefirst basin 401 according to the flow direction of the cyclonic action. Such channels can reduce the likelihood of blood cells re-entering thesecond basin 402 after being expelled therefrom via cyclonic flow. The termini of thechannels first basin 401 can be configured with, e.g., a protruding lip or other structure to further reduce the likelihood of blood cells re-entering thesecond basin 402. - In this embodiment, the
first basin 401 includes anexit port 466 configured to collect blood cells, e.g., the collection ofblood cells 465, that settle to thebottom portion 460 of thebasin 401. Theexit port 466 includes astopcock 467 configured to allow a user to open and close theexit port 466 as desired. - Still referring to
FIG. 4 , a method for extracting blood cells from absorbent surgical materials can include the following steps: - First, a user places absorbent materials used during a surgical procedure, and having blood soaked therein, into the
second basin 402. The user can optionally place the retainingring 450 atop theabsorbent materials 420 to keep them from moving about the basin during rinsing. The user can then fill the first andsecond basins solution reservoir 430 until the level of the rinse solution is above thecollection bowl 435 of thepump 437. The user can then activate thepump 437, which causes rinse solution to be expelled from themulti-output port assembly 439 in a substantially horizontal direction, as illustrated. The rinse solution can flow over and through the absorbent materials to rinse blood cells therefrom, which are then expelled through thepores 405,channels first basin 401. The blood cells can settle to thebottom 460 of thefirst basin 401, where they can be collected via theoutlet port 466 and sent to a cell salvage machine. - It will be understood that the configuration of
pump 437, including theinlet tube 436,collection bowl 435, andmulti-output port assembly 439 as depicted inFIG. 4 is one of many suitable alternatives for providing cyclonic separation of blood cells from rinse solution, and that other configurations can be substituted according to preference or other factors. Similarly, the principle of collecting blood cells using cyclonic action of a rinsing agent can be applied to other embodiments described herein. - A number of illustrative embodiments have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the various embodiments presented herein. For example, the basins described herein can be composed of any suitable or desirable material, including, but not limited to plastics, glass, metals, etc. In a preferred embodiment, the basin can be formed from resilient Plexiglas to reduce the likelihood of breakage. Various types of motors can be used in embodiments that extract blood from absorbent materials using centrifugal force, including electric and variable-speed electric motors. Substantially cylindrical basins are depicted in the various drawings for simplicity; it will be understood that the basin can be of any desired shape or size to suit the user or provide advantages in manufacturing of the various systems described herein. Similarly, baskets (e.g., basket 350) can be configured or shaped according to preference or manufacturing considerations while still providing the same or similar functionality. It will be understood that the drawings presented herein may not be to scale and that various modifications and improvements can be made without departing from the spirit and scope of their intended use. Accordingly, other embodiments are within the scope of the following claim.
Claims (30)
1. An assembly for extracting blood from absorbent material, comprising:
a basin having a wall and floor; and
a perforated apparatus adapted to be disposed within the basin, wherein the perforated apparatus allows blood to pass therethrough from the absorbent material into the remainder of the basin for collection and reuse.
2. The assembly of claim 1 , further comprising a plunger plate that is sized to be inserted into the basin, wherein the plunger plate is adapted to compress the absorbent materials to extract blood therefrom.
3. The assembly of claim 2 , wherein the plunger plate is driven down by rotation of a shaft.
4. The assembly of claim 1 , further comprising a rinse solution that is applied to the absorbent material to assist in extracting the blood.
5. The assembly of claim 4 , wherein the rinse solution is initially applied to a plunger plate.
6. The assembly of claim 1 , wherein the perforated apparatus is adapted to be rotated to allow blood absorbed in absorbent material to be extracted using centrifugal force.
7. The assembly of claim 1 , wherein the perforated apparatus is mounted on stands that extend from the floor of the basin.
8. The assembly of claim 1 , wherein the floor of the basin is concave or conically shaped in order to direct blood to an exit port of the basin.
9. The assembly of claim 8 , wherein the exit port connects to tubing leading to a cell salvage machine.
10. The assembly of claim 1 , wherein the perforated apparatus comprises a second basin and wherein the first basin and second basin are configured to remove the blood from the absorbent material using a cyclonic action.
11. The assembly of claim 10 , wherein the cyclonic action is generated by a wash solution that is used to both rinse blood from the absorbent material and separate blood from the rinse solution.
12. The assembly of claim 11 , wherein the wash solution is introduced in a substantially horizontal flow direction relative to the absorbent material so as to create a cyclonic vortex of the wash solution.
13. The assembly of claim 11 , wherein the wash solution comprises a heparinized saline solution introduced into the first basin and/or the second basin under pressure.
14. The assembly of claim 10 , wherein the first basin is provided with a collection bowl that provides a fluid intake port for a pump to allow for recirculation of wash solution.
15. The assembly of claim 14 , wherein a fluid output of the pump is directed into a multi-output port assembly.
16. The assembly of claim 10 , wherein the second basin includes a cylindrically-shaped pillar configured to assist in creating cyclonic flow of the wash solution.
17. The assembly of claim 16 , further comprising a porous ring having adapted for insertion into the second basin and having a central aperture to allow for insertion of the ring over the pillar.
18. The assembly of claim 10 , wherein a floor of the second basin has pins oriented at an angle into the cyclonic flow direction.
19. The assembly of claim 10 , wherein the second basin has one or more channels disposed through a wall thereof, wherein the one or more channels allow for a substantially unidirectional exit flow from the second basin into the first basin.
20. The assembly of claim 19 , wherein a termini of the one or more channels can be configured with a structure to further reduce the likelihood of blood cells re-entering the second basin.
21. An assembly for extracting blood from absorbent material, comprising:
a first basin; and
a second basin, wherein the first and second basin are configured to remove the blood from the absorbent material using a cyclonic action.
22. The assembly of claim 21 , wherein the cyclonic action is generated by a wash solution that is used to both rinse blood from the absorbent material and separate blood from the rinse solution, wherein the wash solution is introduced in a substantially horizontal flow direction relative to the absorbent material so as to create a cyclonic vortex of the wash solution, and wherein the wash solution comprises a heparinized saline solution introduced into the first basin and/or the second basin under pressure.
23. The assembly of claim 21 , wherein the first basin is provided with a collection bowl that provides a fluid intake port for a pump to allow for recirculation of wash solution, and wherein a fluid output of the pump is directed into a multi-output port assembly.
24. The assembly of claim 21 , wherein the second basin includes a cylindrically-shaped pillar configured to assist in creating cyclonic flow of the wash solution, and further comprising a porous ring having adapted for insertion into the second basin and having a central aperture to allow for insertion of the ring over the pillar.
25. The assembly of claim 21 , wherein a floor of the second basin has pins oriented at an angle into the cyclonic flow direction.
26. The assembly of claim 21 , wherein the second basin has one or more channels disposed through a wall thereof, wherein the one or more channels allow for a substantially unidirectional exit flow from the second basin into the first basin, wherein a termini of the one or more channels can be configured with a structure to further reduce the likelihood of blood cells re-entering the second basin.
27. The assembly of claim 21 , wherein a floor of the first basin is concave or conically shaped in order to direct blood to an exit port of the first basin, wherein a flow regulation device is disposed in the exit port to allow a technician to regulate blood flow from the first basin.
28. The assembly of claim 27 , wherein the exit port connects to tubing leading to a cell salvage machine.
29. The assembly of claim 28 , wherein a vacuum or pressure differential is provided to assist blood travel from the first basin to the cell salvage machine.
30. An assembly for extracting blood from blood-soaked absorbent materials, comprising:
a rotatable basket configured to hold said absorbent materials, said basket having porous walls that allow said blood to pass therethrough when said basket is rotated at an angular velocity sufficient to cause said blood to be extracted from said absorbent materials;
a basin having a wall and floor to cooperatively collect said blood that passes through said basket in a collection area, and a lid; and
an elongate drive shaft attached at one end to a floor of said basket and coupled at an opposite end to a motor capable of rotating said drive shaft at said angular velocity;
wherein a tube provides fluid communication of said blood in said collection area to an inlet of a cell salvage machine.
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US14/533,711 US10076595B2 (en) | 2012-08-15 | 2014-11-05 | Systems and methods for blood recovery from absorbent surgical materials |
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US14/533,711 Active 2034-01-17 US10076595B2 (en) | 2012-08-15 | 2014-11-05 | Systems and methods for blood recovery from absorbent surgical materials |
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US10159980B2 (en) | 2013-08-02 | 2018-12-25 | All Cell Recovery LLC | Systems and methods for recovering blood cells, in a controlled environment, for storage |
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Also Published As
Publication number | Publication date |
---|---|
CN104812421A (en) | 2015-07-29 |
US20150059813A1 (en) | 2015-03-05 |
CN104812421B (en) | 2017-06-06 |
WO2014028605A1 (en) | 2014-02-20 |
CN104780954A (en) | 2015-07-15 |
CN104780954B (en) | 2017-05-03 |
WO2014028604A1 (en) | 2014-02-20 |
US8986238B2 (en) | 2015-03-24 |
US10076595B2 (en) | 2018-09-18 |
US20140050615A1 (en) | 2014-02-20 |
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Owner name: CYCLONE MEDTECH, INC., MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROBINSON, LEN;REEL/FRAME:031009/0798 Effective date: 20130812 |
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