|Title of Invention||
A DEVICE OF HEMODILUTION TRANSFUSION FOR COLLECTION AND REINFUSION OF HUMAN BLOOD,PLASTIC STRIPPERS AND THE PROCESS THEREOF
|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.
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.
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
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
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
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
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
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
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
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
Brief description with drawings.
Figure 1 shows the hemodilution transfusion bag.
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
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.
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
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
|Indian Patent Application Number||1225/KOL/2010|
|PG Journal Number||06/2017|
|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|
|PCT International Classification Number||A61B19/00|
|PCT International Application Number||N/A|
|PCT International Filing date|