Title of Invention | A DEVICE OF HEMODILUTION TRANSFUSION FOR COLLECTION AND REINFUSION OF HUMAN BLOOD,PLASTIC STRIPPERS AND THE PROCESS THEREOF |
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Abstract | The present invention relates to a system for the collection and re-infusion of blood in to a human body just before surgery. More specifically, it is a system and method for the collection and re-infusion blood to human body. It is used for collecting the blood just before the surgery within a short span of time and anti-coagulating patient"s blood for re-infusion in to the same patient. In this invention, two single tube segments are connected to two PVC blood bags as shown in the figure (1). Then these tubes are connected to Y connector through the roller cum stripper and 5 clamps and the same is then connected to the gauze needle covered with needle safety shield. The transfusion bag is provided with a Rotary shaker for the mixing of the solution with blood so that the time of the clinicians can be saved. Alternatively, a printed scale is provided on "b" side of the bag, and one "S" hook is provided at the lowest part of the bag which helps to collect blood in the OT without the help of any gadget. |
Full Text | Field of invention The present invention relates to a system for the collection and re- infusion of blood in to a human body just before surgery. More specifically, it is a system for the collection of blood from human body (an eligible patient) just before surgery and re-infusion to the same person. The proposed invention will be used for collecting blood just before surgery within a short span of time and anti-coagulating patient's blood for re-infusion in to the same patient on the operation theater (OT) table prior to the surgery. Background Transfusion Medicine is a specialty of medical sciences offering human health care services. This specialty deals with collecting blood from human volunteers; testing for various transfusion transmitted infectious markers (like HIV, hepatitis etc.); separating in to individual blood components and issuing to needy patients. Blood transfusion services take all precautions to prevent transfusion transmitted infections from volunteer's blood to the blood of recipients. However, transfusion of blood always carried a risk of transfusion transmitted infections. There are other multiple risks of blood transfusion when blood from individual is transfused to another individual (homologous or ordinary blood transfusion). These complications are developing antibodies against transfused blood components (e.g. red cells, white cells, platelets and plasma proteins); wrong blood transfusion due to misidentification of units; hemolysis of blood units due to long or unfavorable storage. To avoid these problems, blood from the same patient is collected just before the surgery on the OT table and transfused to the same patient during or after the surgery as per requirement To avoid drawbacks of conventional blood transfusions, autologous blood transfusion is highly suggested by Transfusion Medicine text books. Autologous transfusion is defined as the collection and subsequent reinfusion of patient's own blood or blood ^ component. Blood from the eligible patient is collected (before, during or after the surgery), stored temporarily and reinfused as needed during or after the surgery. As own blood is easily accepted by the body, it is an extremely safe way to help the patient in the recovery process. The body will easily replace the blood cells and volume of the fluid between each donation. There are three main types of autologous transfusions: 1. Pre- deposit transfusion 2. Normo volumic hemodilution transfusion 3. Cell salvage transfusion 1. Pre- deposit autologous transfusion. When the patient donates 2 or more units of blood within 3- 10 days before planned surgery in a normal single blood bag is called pre- deposit autologous donation. These bags are transfused to the same patient during or after the surgery. 2. Normo volumic hemodilution transfusion In this case, 2 or more units of autologous blood are collected from the patient on the OT table just before the surgery and the same volume is replaced with normal saline. In absence of customized hemodilution bags, this procedure is done by using ordinary single blood bag. The main idea of this normo volumic hemodilution is that whatever blood is lost by the patient (during surgery) is diluted blood. Whenever the patient requires blood transfusion, already collected autologous fresh blood is transfused back to patient with fresh platelets and coagulation factors. That is why this process is called hemodilution. Use of patient's own blood that was withdrawn just before the surgery to replace the blood lost during surgery has been found to provide better perfusion and reduced blood loss due to the dilution of patient's blood. 3. Cell salvage transfusion When there is a bleeding inside the body and blood is collected in the body cavity like abdomen or thorax, then the collected blood is aspirated out with an artificial pump. Then the shaded blood is washed or filtered and transfused back to the same patient Hemodilution technique is earned out in the OT by the anesthetists and or by the surgeons which is theoretically and technically different entity than other two procedures. Depending upon the disease condition and hemoglobin status of the patient doctors decide for hemodilution procedure on the spot. They collect blood from the patient just before the surgery (volume replaced with normal saline) and keep in the operation theatre for transfusion during or just after surgery. The main idea of this process is that if the patient bleeds during surgery, he / she will loose diluted blood and patient's own pre-collected units will be transfused when required. This process is simple and does not require any instrument However, it is usually not practiced due to absence of customized hemodilution bags. Advantages of hemodilution: There is no risk of any transfusion transmitted infectious markers. The advantages of the Hemodilution baas are in contrast with donor blood; patient's blood is instantly available and requires no cross matching. There is no risk of incompatible blood transfusion. There is no risk of transmission of diseases like HIV, hepatitis (B & C), Syphilis etc. Surgeons/ anaesthetist do not need to depend on blood bank supply especially in case of rare blood groups and blood shortage situations. This procedure saves money and time of relatives of patients. There is also no problem related to transportation of blood from blood banks. In a country like India, patient's relatives would not be forced to donate as replacement blood donors. Hemodilution helps to lower hemoglobin during surgery which leads to drop in red cell number directly lowering blood viscosity, decreasing peripheral resistance and increasing cardiac output Though hemodilution procedure is highly recommended for safe blood transfusion, it is hardly practiced by surgeons and anesthetists due to absence of any suitable collection apparatus. In absence of any specialized hemodilution bag, clinicians are forced to use ordinary single blood donation bags containing CPDA1 solution which is a preservative solution for long term blood storage. For the collection of every unit of blood from patient, clinicians have to prick veins for every unit they collect which leads to problem in finding veins every time. Moreover, blood collected in CPDA1 infuses extra chemical/ preservative unnecessarily to patients. Prior Arts In the prior arts, many techniques are known for the collection and re- infusion of blood just before the surgery. One of such technique is US 2004/ 0102728 which describes an apparatus for collecting blood from a patient, comprising a collection vessel having a pleated, compressible body, the vessel having an inlet port adapted to be connected to a patient line for drawing blood from a patient; at least one, outlet port adapted to be connected to a blood collection bag. In this patent a filter, catheter, pump like structure to pump out shredded blood from the abdomen/ chest etc. are enclosed. Also in this patent bag needs to be primed with blood from the hand pump. In this prior art, the bag can be kept only for 6 hrs because it is an open system. This patent daim is related to cell selvage transfusion which is completely different in terms of structure and process described in the present claim. In other known technique, US 2006/0142707: a system and method for autologous normovolemic hemodilution (ANH) is disclosed. The system can include a vacuum canister, which is sized to accept donor bags of a predetermined capacity. The vacuum canister is connected to a vacuum source which applies suction to the donor bag within the canister. The system can include a canister having a self-generated vacuum, which includes compressible sidewalls that are spring-loaded to provide negative pressure needed to collect blood from a patient without the use of a gravity-induced siphon gradient. Also disclosed are ANH systems and kits that rely on a gravity-induced siphon gradient for blood collection. The distinguishing features of the invention with the prior art are as follows. 1. Blood is collected from arterial line but in the present invention, blood is collected from venous line. Venous blood collection has less complication than arterial blood collection. 2. Blood flow is connected to canisters with a stop cock like valve. But in the present invention, it is collected by gravity gradient 3. In the US patent there is artificial pressure to collect blood which may lead to rupturing of red cells, but in the present invention, there is no rupturing of blood cells since the blood is collected by the gravitational force. There is no chance of blood damage due to artificial pressure. 4. There is a T shaped connection whereas present invention bag has 'Y' connection which provides the collection of blood in to multiple bags. 5. There is a rotating canister in the prior art but there is no such attachment in the invention of the applicant 6. In US patent no anticoagulant is specified whereas in the present invention blood bag, acid citrate dextrose (ACD) is used as anticoagulant. The prior art mentioned that bags will be "filled with anticoagulants'. All blood transfusion anticoagulants are liquid and measured in ml. Without liquid anticoagulants, blood will clot Or, if dry anticoagulant like EDTA is used, blood transfusion will be toxic for transfusion. In the invention of the applicant only anticoagulant (ACD) was used but no preservatives are used. 7. In the US patent, -22 mmHg negative pressures by canister had been applied and blood collected from an artery. Arterial pressure is usually 140 mm of Hg and cumulative pressure on collected blood will be about 162 (140 + 22) mm of Hg which may damage cells collected inside the bag. 8. This patent claim is completely different in terms of structure and process described in the present claim. In another method US 2004/0243105 the invention provides an apparatus and method to allow for the drainage of blood from the site of the wound into a blood collection device. The blood collection device is held at a vacuum as is retained within a vacuum storage chamber which is in turn conjoined to a further primary vacuum reservoir by a valve. The valve serves to control and regulate the vacuum levels between the primary vacuum reservoir and secondary chamber in which the blood collection device is contained. Following drainage of blood into the blood collection device, the flexible walls of the blood collection device allow for the optional re-transfusion of blood back into the patient from whom it was drained. This patent claim is related to cell selvage transfusion which is completely different in terms of structure and process described in the present claim. In yet another method US 4006745 , an autologous blood transfusion system comprising at least two interconnected blood receptacles, the first of which is evacuated and connected to a suction device for aspirating blood. The second receptacle takes blood from the first by overcoming the vacuum in the first with a greater vacuum in the second without interrupting the ability of the suction device to simultaneously aspirate blood. The second receptacle comprised a transfer bag for re-infusion into the patient or an infusion set connected to the second receptacle to permit simultaneous collection of the blood from the patient and infusion of the blood back into the patient In either case, the second receptacle is selectively exposed to positive pressure to expel the blood from the second receptacle into the transfer bag or patient The method includes aspirating blood from the patient and collecting blood in the first receptacle. Blood is thereafter transferred to the second receptacle by increasing the vacuum in the second receptacle over the first receptacle without interrupting the ability of the suction device to simultaneously aspirate blood. Blood is then expelled from the second receptacle by subjecting the blood within the second receptacle to positive fluid pressure. This patent claim is related to cell selvage transfusion which is completely different in terms of structure and process described in the present claim. In JP 8052197, it is stated that, to provide a set of blood bags, which prevents white corpuscles from being mixed in concentrated red corpuscle liquid in a parent bag for collecting blood by connecting bags filled with red corpuscle preserved liquid to the parent bag for collecting blood using a connecting tube. In a set 1 of blood bags, first child bag 8 and a second child bag 6 is connected to a parent bag 4 for collecting blood, which is used to collect whole blood through a blood collecting needle 2 and a blood collecting tube 3. The child bag 6 and 8 are divided by a branched tube 7. A bag 10 including red corpuscle preserved liquid is connected to the parent bag 4 for collecting tube 11. Each of a connecting tube 5 and 1 is provided with a stopper, called a bent bar, which is bent near the parent bag 4 for collecting blood to pass through. When reserved red corpuscle liquid is transferred in to the parent bag 4 for collecting blood, the set 1 of the blood bag is allowed to communicate with the child bag 6 and 8 by setting the connecting tube 11 not to pass through the connecting tube 5 polluted by buffycoat. There fore, white corpuscles are not mixed. This patent claim is related to auto transfusion in children which is completely different in terms of structure and process described in the present claim. The inventor of the present invention has invented the present hemodilution bag which is easier to operate. It is a one step method for the collection and re- infusion of blood with a single phlebotomy with acid- citrate-dextrose (ACD) as FDA (Food & Drug Administration) approved anticoagulant. Here in the present invention, blood collected is fresh and so there is no need to use any filter. This hemodilution bag is for adult patients. Moreover the blood is collected from the venous line which has no complexity. The tube of the bag is sufficiently long (170 cm) so that blood can be collected when patient is lying on an OT table. It can be kept for a maximum of 21 days if required, without any preservatives. Both bags are collected just before the surgery and not during or after the surgery. In the hemodilution bag, the blood is collected from the vein or from the central line of the patient. Hence the present invention is entirely different from the all prior arts. Summary of the invention. The present invention relates to a system for the collection and re- infusion of blood to human body just before surgery. The present invention comprises of a novel system and method for the collection of patient's blood just before surgery and collected volume of blood is replaced by normal saline infusion before surgery and there after reinforcing the same blood to the same patient during or after surgery. The bag used for the present invention is made of PVC plastic (medical grade). There is one 16 gauze needle covered with needle safety shield on the tip of the apparatus to collect blood either from the arm of the patient or from the central line attached to the surgical patient From the needle there are about 170 cm long single tube segments and after that there is a 'Y' connector with two bag attachments. There are either two 350 ml bags or two 450ml bags as per requirement of clinicians. This connection will be increased to four such 350 or 450 ml bags as per requirement of clinicians. The length of the tubing from the connector to the bag is 170 cm or more. There will be one roller cum stripper clamps on both tubes after the plastic clamp near to the Y connector. This attachment is to strip down dead volume blood in the tubing and also to regulate flow of blood in both bags. There will be five plastic clamps in the invention, one will be in between the needle butt and Y connection, one each will be on the proximal part and one each on distal part of both roller and striper. The hemodilution transfusion bag is designed with two plastic bags and two long single tube segments are attached to the Y connector on the bag. Roller cium stripper damp is attached to each tube near to the Y connector. Then both the tubes are connected to the centre of the two separate bags as shown in the figure 1. Both bags contain only Acid Citrate Dextrose (ACD) solution as the anticoagulant and there are no preservatives like manitol, phosphate or adenine in the bag. The anticoagulant ratio will be kept at 15 ml of ACD for every 100 ml of blood collected. It will prevent the unnecessary infusion of patients with preservatives. The length of the collection tube will be approximately 170 cm which is sufficiently long to collect blood from patients arm or central infusion line when the patient is lying on the OT table. A rotary shaker for mixing the solution with the blood is provided for frequent mixing, there by preventing coagulation and saving precious OT time. It will also ensure accurate volume collection. However, if any clinician does not want to invest in buying rotary shaker, they can adopt alternate method. Two plastic hooks are provided on each blood bag to hang the bags upside down during collection so that the collected blood passes through the anticoagulant solution and it is automatically mixed with the solution. There will be printed scale on the back side of both bags (side- b). The amount of blood collected can be measured in relation to volume collected with the help of printed scale. Once the patient is shifted to the OT table, one of the good peripheral veins will be selected by the anesthetists/ surgeon for phlebotomy. The bag will be taken out of the sterile pouches and name and hospital identification number of the patient will be written in the green labels of the both blood bags to avoid misidentification as per international standard (side-a). Two loose knots are placed 5 cm above each bags near C-3 clamps. Once vein is selected and skin preparation is completed for aseptic blood collection (or central line is decided), venipuncture (or connected to central line) is done and blood starts coming to both bags by gravity one after another using clamps (C-2). When collection in the first bag is completed, respective C-2 clamp of the closed, remaining blood in long tube is stripped down towards the main bag, damp (C-3) is applied, and loose knot is tied down. The tube between the tied knot and the clamp is cut bag is separated and first hemodilution bag is ready. Once C-2 on one side is closed, simultaneously, other side C-2 is opened so that blood started coming to the second bag. When second bag is filled up, first clamp (C-1) is closed, needle (coupler) is taken out from the vein or central line and needle guard is applied to prevent needle stick injury. The same process is repeated like, the other side and second hemodilution bag is separated from tubing. If clinician has requirement for collection of more than two units in a single go, similar bags with 4 attachments with single needle can be developed. A novel plastic roller cum stripper has been attached on both sides of long tubing. Objectives The object of the present invention is to provide a hemodilution transfusion bag system for collecting blood without applying external force. Hemodilution is one of the best and safest systems of blood transfusion; however, there is no hemodilution bag available which collects venous blood by natural force without applying mechanical force (which may damage blood content inside the bag/ canister). Due to absence of specialized bag, surgeons and anesthesiologists cannot practice hemodilution procedure in a scientific manner thus exposing eligible patients to the risks of transfusion related complications. Another object of the present invention is to collect blood from the peripheral vein or central line with the help of gravity and also because of positive pressure in the vein of the patient with the help of a special process. Further object of the present invention is to provide a hemodilution bag working on the gravitational force so that the damage caused to the blood cells due to the creation of the pressure either by hand pump/ mechanical pump or by any external pressure can be eliminated. Further object of the present invention is to provide each filled hemodilution blood bag within 7 to 10 minutes. In order to avoid the clotting, it can be mixed by using blood bag shaker or by hanging upside down from OT table with hooks and using a scale on the back of the bag (side-b). Further object of the present invention is to prepare the blood collected bag just before (10-30 minutes) the surgery using the hemodilution bag for the same patient Yet another object of the present invention is to provide a hemodilution bag with liquid anticoagulants but without any preservative which can be kept for a maximum of 21 days since it is a closed system, thus preventing infusion of unwanted red cell preservatives (chemicals). Further object of the present invention is to provide a hemodilution bag which can be collected just before the surgery, not during or after the surgery. Yet another object of the present invention is to provide an industrially viable and convenient (simple to use) hemodilution transfusion bag even in small hospitals without any complicated procedure. Yet another object of the present invention is to provide extremely safe transfusion bags which easily replace the blood cells and volume of fluid between each donation. Yet another object of the present invention is to provide a closed transfusion bag system (either of 350 ml and or 450 ml) which is filled with ACD Solution (15 ml of ACD for 100 ml of blood) which has a shelf life of 21 days. Yet another object of the present invention is to provide a transfusion bag which does not have a problem of back flow. Another object of the present invention is that the anesthetist / surgeon can take the spot decisions on the table for autologous transfusion and there is no dependency on the blood banks for cross- match test. It saves time, availability of blood at blood banks and transportation problems. Moreover, it does not require extra man power and extra cost It prevents adverse transfusion reactions. Brief description with drawings. Figure 1 shows the hemodilution transfusion bag. Detailed Description The present invention comprises of a novel system and method for the collection of patients blood just before surgery and before he starts bleeding and there after transfusing the same blood to the same patient whenever required during or after surgery. The present invention (figure: 1) comprises of two blood bags (J-1 & J- 2) which are made of medical grade PVC plastic. These are made of 350 ml or 450 ml capacity as per requirement of clinicians. There is a green coloured label on one side of the bag (side-a of both bags) which carry manufacturer's information, name of the patient and the hospital number of the patient for identification (G-1 &G-2). On the other side of the bag (side-b of both), there is a scale which will show amount of blood collected in the bag (1-1 & I-2). Both labels and scales are placed upside down so that users in the OT room can read them correctly. One plastic hook (H-1 & H-2) is placed in the bottom of each bag so that each bag can be hanged upside down for collection. Both the bag contain Add Citrate Dextrose ( ACD) solution as anticoagulant only and there is no adenine, phosphate or manitol preservative because these bags are not going to be used for RBC preservation. It will prevent unnecessary infusion of patients with preservatives. Two single tube segments (F-1 & F-2) having about 150cm length are connected to the T connector (D) of the blood bags (2 cm) as shown in the figure 1. Two loose knots will be applied by the user 5 cm above the blood bag before starting blood collection. There are two plastic clamps (C-3) on both sides which will be just near the knot (away from the bag). There is one roller cum stripper clamp on each side (E-1 & E-2) attached to each tubes at the distal end of the tube. It is made of two rolling plastic wheels inside a plastic frame. Both wheels can be pressed by two fingers and rolling wheels will squeeze down remaining blood in the dead volume of the tubing towards the blood bag. This is a part of the novel invention. The inner diameter of the tubing is approximately 2.8 mm and external diameter is about 5 mm. There are two plastic damps (C-2) on both side in between the Y connection and roller cum strippers. The function of these two clamps is to regulate flow on both sides of bags and also to remain close during stripping of dead volume of blood. Then both the single tubes are connected to a plastic " Y " connector (D) having 2 cm length and the same is connected to a piece of tubing having a length of 20 cm. Then the tubing is connected to plastic needle butt to which one 16 gauze needle (A) is connected. There is a needle guard (8) just before the needle butt which can slide up and down. The function of this is to protect the operator from needle stick injury after blood collection. There is another damp (C-1) in between Y connector and the needle guard. The function of the damp is to dose blood connection at the end of the procedure before putting needle guard into position. A green colour blood bag label (G) for the patient identification is attached to each blood bag as shown in the figure-1 (side 'a' and 'b' of both bags). Both labels are placed upside down so that OT staff can read identification details during collection and transfusing back to the patient. One slit is provided on each bag on the proximal end for hanging the bag as shown in the figure. One plastic hook (H-1 & 2) is provided on each bag as shown in the figure for hanging the blood bag upside down during the collection so that the collected blood passes through the anticoagulant solution. There is a needle guard of about 8 cm (B) which will be slipped forward to cover the tip of the needle (A) to avoid needle stick injury to OT staff after taking the needle out of vein/ central line. There will be 5 plastic damps (C-1, C-2 & C-3). One will be below the needle guard towards the Y connection (C-1), one each will be distal (C-2) and another one each (C-3) proximal to the roller and strippers on both sides. With the use of the blood bag shaker and weight monitor for mixing the blood with the solution, it is automatically mixed with solution and actual amount of desired quantity can be collected. When rotary shakers are used, clinicians can save their time by avoiding frequent mixing and saving their precious OT time. If they do not want to use expensive rotary shakers, the can use the scale on the back side (side-b) of the bag of measuring amount of blood collection. The procedure for the collection of the blood in the hemodilution blood baa is: 1. Take out the blood bag from the sterile sealed cover and write down the name, hospital No (and blood group, if available) of the patient in the green labels attached to the blood bags for the identification. 2. Put one loose knot each from 5cm above each hemodilution bags and below the plastic damp. There is one hook on each bag and both the bags are hanged upside down to any attachment of the OT table below the body level of the patient. Break open the needle cover and does a phlebotomy in any of the major veins of the patient. It may be replaced by a coupler which can be connected to a central line of the patient. 3. Two roller cum stripper clamps are provided in the tubing. In between this attachment and Y connector, there are two clamps. One clamp will be closed and another one will be open to facilitate blood flow to the bags one after another. Once needle is connected to the vein (or central line), blood will start coming to one bag. Since both the bags are kept upside down, blood will enter from the patient to the hemodilution bag through the ACD anticoagulant which will automatically anticoagulate autologous blood. These bags will be supplied with commercially available blood bag shaker and weight monitor which will help constant mixing of blood and also to collect exact amount of blood. 4. Once the first bag is full, the clamp will be applied near the roller cum stripper to stop blood collection in the first bag. The clamp on the other side will be opened and blood will start collecting in the second bag. 5. White second bag is in the process of filling up, remaining blood in the tube of the first bag will be stripped down up to 5 cm top of the bag and the damp near the knot will be closed. Then the pressure on the roller will be released and the loose knot will be tied. It will prevent backflow of blood from the bag to the tubing again. The process will prevent wastage of about 50 ml of autologous blood of the patient on each side of the tube. The first bag tubing is cut between the knot and the clamp. 6. When the second bag is full, one clamp is closed which is placed between the roller and Y connection and another clamp is also dosed between Y connector and the needle guard. The needle (or the coupler) is taken out of the vein (or central line) and needle guard is applied to prevent needle stick injury. 7. The same procedure is repeated for the second bag when it is full as mentioned in step no: 5. 8. Both autologous blood bags are ready to use and shifted to the tables in the OT room. They will be kept on a flat surface at airconditioned temperature (22-24° C) for 6 hours. If required, both units can be transfused like banked blood in the OT or in the ward anytime between 0 hours to 21 days after collection. Before transfusion, it is mandatory to cross-check identity of bags with the patient. 9. If transfused after 6 hours, it is recommended to store in a regulated and monitored temperature of 2-8° C. 10. All needle, needle guard and extra tubing shall be discarded as per norms of btohazard materials. I Claim 1. A hemodilution transfusion bag for the collection and re-infusion of the blood just before the surgery that comprises of two or more plastic bags, two tube segments, two roller cum stripper clamps, five plastic damps, one Y connector and 16 gauze needle covered with needle safety guard; the bags are filled with Acid Citrate Dextrose solution; the bags are connected to the needle through the Y connector with the help of two tube segments; the tubes are provided with two clamp cum stripper; the method of collection of the blood is as herein before described 2. The hemodilution transfusion bags as claimed in claim 1 wherein the bags are adapted to be connected to the Y connector through two plastic tube segments. 3. Hemodilution transfusion bags as claimed in claims 1 and 2 wherein the roller cum stripper clamps are connected to the tubes near Y connector. 4. Hemodilution transfusion bag as claimed in claim 1 wherein the blood is collected in the bags with the help of gravity and positive pressure in the vein of the patient and blood is filled in both bags and subsequently disconnected one by one involving the whole process. As mentioned before. 5. Hemodilution transfusion bag as claimed in claim 1 wherein the blood collected have a maximum shelf life of 21 days. The present invention relates to a system for the collection and re-infusion of blood in to a human body just before surgery. More specifically, it is a system and method for the collection and re-infusion blood to human body. It is used for collecting the blood just before the surgery within a short span of time and anti-coagulating patient's blood for re-infusion in to the same patient. In this invention, two single tube segments are connected to two PVC blood bags as shown in the figure (1). Then these tubes are connected to Y connector through the roller cum stripper and 5 clamps and the same is then connected to the gauze needle covered with needle safety shield. The transfusion bag is provided with a Rotary shaker for the mixing of the solution with blood so that the time of the clinicians can be saved. Alternatively, a printed scale is provided on "b" side of the bag, and one "S" hook is provided at the lowest part of the bag which helps to collect blood in the OT without the help of any gadget. |
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Patent Number | 280060 | ||||||||||||
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Indian Patent Application Number | 1225/KOL/2010 | ||||||||||||
PG Journal Number | 06/2017 | ||||||||||||
Publication Date | 10-Feb-2017 | ||||||||||||
Grant Date | 08-Feb-2017 | ||||||||||||
Date of Filing | 02-Nov-2010 | ||||||||||||
Name of Patentee | CHOUDHURY; NABAJYOTI | ||||||||||||
Applicant Address | 13-J, BIRCH-II, HILAND WOODS, NABABPUR, NEW TOWN, RAJARHAT, KOLKATA-700 157 | ||||||||||||
Inventors:
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PCT International Classification Number | A61B19/00 | ||||||||||||
PCT International Application Number | N/A | ||||||||||||
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