CA1272655A

CA1272655A - Connector for plasmapheresis bag

Info

Publication number: CA1272655A
Application number: CA000514968A
Authority: CA
Inventors: Yukihiro Kawano; Michihiro Watanabe; Hirohumi Iga; Seiichi Ono; Yoshiyuki Isobe; Toshihiko Ono; Tomishiro Juji
Original assignee: Kawasumi Laboratories Inc
Current assignee: SB Kawasumi Laboratories Inc
Priority date: 1985-07-31
Filing date: 1986-07-30
Publication date: 1990-08-14
Also published as: DE3676769D1; EP0217055B1; EP0217055A1; US4790567A

Abstract

ABSTRACT OF THE DISCLOSURE
The present invention is a connector to be provided on way of a blood restoring circuit of a plasmapheresis bag set, comprising a male connecting member and a female connecting member.
Each of the members is provided with a key ring of a struc-ture in laminated layer, and the key rings are formed, at ends with a convex or a groove for having combination of the both members.
The connecting members are provided with positioning means therefor, and positionings of the convex or the groove of the key rings are adjusted per each of the connectors.

Description

A CONNECTOR FOR PLASMAPHERESIS BAG

BACKGROUND OF THE INVENTION
(Field of the invention) The present invention relates to a connector for plasma-pheresis bag set which is used for exsanguinating or drawing the blood from a blood donor, dividing a blood component and a blood plasma component, and after having stored the blood plasma component only, restoring a xest blood component to the blood donor.
(Description of the prior art) Fig.25 shows an outlined view of a conventional plasmapheresis bag.
A plasmapheresis bag 400 comprises a pair of a blood exsanguinating bag 401 and a blood plasma dividing bag 402, and, if required, comprises a combination of two or three pairs.
The bag 401 is connected at its top to a blood drawing tube 403 which communicates with a blood restoring tube 405 having an exit 404 and a branched blood exsanguinating tube 407 having a needle 406.
Said bag 401 is furnished with a blood transfusing mouth 408 and a protector 409 therefor, and is connected to a tube 410 communicating with the blood plasma dividing bag 402 via a communication piece 410a.

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In the prior art, when the above mentioned plasmapheresis bag 400 was composed of only a pair of the blood bag 401 and the blood plas~a separating bag 402, it has been used as mentioned under.
The blood drawing needle 406 is pierced into a blood tube of the blood donor, and the blood is introduced into the blood bag 401 via the tubes 407 and 403. When a determined amount of the blood is gathered, the needle 406 is covered with the cap 411, and the tube 403 is closed with a welder and cut off. The bag 401 supporting the blood and the blood plasma separating bag 402 connected to the blood bag 401 are subjected to a centrifugal machine for dividing the blood in the bag 401 into the blood component and the blod plasma com-ponent.
Subse~uently, the communication piece 410a is broken to open a flowing path, and a supernatant blood plasma component onl~ is adopted in the blood separating bag 402 via the com-municating bag 410, while the blood component remaining in the bag 401 is restored to the blood donor through a blood transfusion set 420 as shown in Fig.26.
The blood transfusion set 420 is composed of a bottle 421 supporting a physiological saline solution containing an anti-coagulation agent, an introduction tube 422, a blood restoring needle 424, an instillation tube 425, a blood restoring tube 426, a clamp 427, and an adapter 428 provided at an end of said tube 426 and fittable to said exit 404.
For use, the saline solution is in advance filled in the blood restoring tube 426 of the blood transfusion set 420, the saline solution introducing tube 422 and the instillation

- 3 - ~

iube 425. The adapter 428 is connected to the blood return-ing exit 404 and the needle 406 is again pierced into the blood tube of the blood donor, and a blood restoring needle 424 is passed through the blood transfusion mouth 408 of the bag 401. Subsequently, the blood component in the bag 401 is introduced to the instillation tube 425 via the tube 429, and is diluted by the saline solution in the instillation tube 425 and restored to the blood donor via the tubes 426, 405 and 407.
When the plasmapheresis bag set 400 is used, it must be confirmed that the blood component to be restored to the blood donor is the same as his.
The confirmation therefor has been carried out in the conventional manners as follows.
~ 1) Checking the blood donor's name and the name of the label of the blood exsanguination bag 401, (2) Checking the number given to the blood donor and the number of the Label of the blood bag 401, (3) Checking the blood donor and the label attached to the blood bag 401.
However, since nowadays the blood plasma producing agents are much required and the blood donors of several hundreds is dealed with a day, human careless mistakes of confusing the names or numbers, or attaching places of the labels might be caused during working to invite vital troub-les of the blood transfusion~

SUMMARY OF THE INVENTION
In the process that the blood exsanguination bag once separated from the plasmapheresis bag set is undertake with the centrifugal separation, and the blood plasla component is obtained, after which, said bag is once connected to said set, and for such a case that the blood component is returned to the blood donor, the present invention is to provide a connector which may exactly connect the separated exsangui-nating bag to the initial plasmapheresis bag set, so that erroneous accidents between the blood donor and the blood component to be restored are avoided without fail.
~ second object of the invention is to provide a connec-tor which can be easily connected without requiring special technique, and keep blood running pathes hygienical.
~ third object of the invention is to provide a compact connector which is easily set up and is produced at low cost.
The above mentioned object of the invention will be accomplished by an under mentioned connector for the plasma-phe~sis bag.
The connector of the invention comprises a male connect-ing member and a female connecting member, and these connect-ing members are provided with key rings respectively, and the key rings are defined, at ends thereof, with engaging portions when said both members are connected, and are provided with positioning means.

~2~

BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a disassmbled connector according to the invention;
Fig. 2 is a front view showing an upper half part of the connector in cross section;
Fig. 3A is a front view showing an upper half part of a housing of a male member in cross section;
Fig. 3B is a right side view of the housing of the male member;
Fig. 3C is a left side view of the housing of the male member;
Fig. 4A iS a front view showing an upper half part of a housing of a female member in cross section;

Fig. 4B is a right side view of the housing of the female member;
Fig. 4C is a left side view of the housing of the female member;
Fig. 5A iS a front view of a lower half part of a key ring of large diameter in cross section;
Fig. 5B is a right side view of the large diametered key ring;
Fig. 5C is a left side view of the large diametered key ring;
Fig. 6A ls a front view showing a lower half part of a key ring of small diameter in cross section;
Fig. 6B is a right side view of the small diametered key ring;
Fig~ ~C is a left side view of the small diameterd key . .

~272G~i ring;
Fig. 7 is a left side view of the male member;
Fig. 8 is a whole view of a plasmapheresis bag set pro-vided with a connector of the invention;
Fig. 9 is a perspective view of a disasembled connector of another embodiment of the invention;
Fig.10 is a vertically cross sectional view of a set-up connector of Fig. 9;
Fig.ll is a front view of an upper half cross section showing another embodiment of a connecting means for male and female members;
Fig.12 is a perspective view showing a further engaging means of said two members;
Fig.13A is cross sectional views of another embodiment of the both members;
Fig.13B is perspective views of the separated male and female members;
Fig.13C is a perspective view oE the connected two memb-ers;
Figs~14 and 15 show another embodiment of positioning the both members, and Fig.14 is a front view bearing confirma tion numbers, and Fig.15 is a perspective view defined with a projection and a corresponding groove Fig~16 is a perspective view showing a still further embodiment of the invention;
Fig.17A is a side view of the male member of Fig.16;
Fig.17B is a side view of the femal~ member of Fig.16;
Fig.17C is cross sectional views along I-I and II-II of the both members of Fig.16;

. . .

7 ~L2~ S

Fig.18 is a perspective view of a disassembled male mem-ber of Fig.16;
Fig.19 is an outlined view of a setting-up device for the male member of Fig.16 Fig.20 is a cross sectional view for explaining another setting-up manner of the male member;
Fig.21 is an outlined view of sealing the both members with a protector;
Fig.22 is an outlined view of applying a sealing member to a connection between the both members;
Fig.23 is a perspective view showing another embodiment of the invention;
Fig.24A is a side view of the connecting side of the male member of Fig.23;
Fig.24B is a side view of the connecting side of the fernale member of fig.23;
Fig.24C is cross sectional views along III-III and IV-IV
of the both members of Fig.23;
Fig.25 is an outlined view of a foregoing plasmapheresis bag set; and Fig.26 is an outlined view of a blood restoring set to be connected to a foregoing plasmapheresis bag set.

8 ~72~5 DESCRIPTION OF PREFERRED EMBODIMENTS
The present invention will be expalined with reference to embodiments shown in the attached drawings.
Fig. 1 is a perspective view of a disassembled connector and Fig. 2 is a front view showing an upper half part of the connector in cross section.
In the same, the numeral 1 is a male member and 2 is a female member. The male member 1 is composed of a housing 3, a key ring 4 of large diameter and a key ring 5 of small dia-meter. The female member 2 is also composed of a housing 6, a key ring 7 of large diameter and a key ring 8 of small diameter. Either one of the small diametered key rings 5, 8 is inserted with a seal packing 9.
Figs.3A, B and C show in detail the housing 3 of the male member 1 which is shaped in cup as a whole and projected at a rear part, with a tube connecting mouth 34 and formed centrally with a blood path 33 as well as a male connecting tube 30 at a center of an inner part.
The male connecting tube 30 is formed, at an outer side, with a step of a large diametered part 30a at a rear part and a small diametered part 30b at a front part.
The housing 3 is formed with a pair of hooks 31, 32 at an upper and a lower part, having elasticity in vertical dir-ections, and the hook 31 has a width Wl larger than a width W2 of the other hook 32.
In such a manner, a vertically reversed connection of the male and female members is never made, and since the hooks are provided at the two parts, the connection is secured. If thicknesses are made different in the hooks 31 and 32, said ~ ~;5 reversed connection may be avoided.
The housing 3 is formed, at its rear part, with a plur-ality of bonding agent pouring holes 35, 35 passing to the interior of the housing, and is formed, at its inner wall, with a bonding agent guide groove 36 which is, as seen in Fig.3C, com-posed of a plurality of circular grooves 36a formed at an inner wall and a plurality of grooves 36b communicating with said circular grooves 36a and extending in length of an inner wall of the housing and in length of said large diametered part 3Oa.
The housing is marked with scalings 37 at the end of the opening, which are each marked per, e.g. 5 circumferentially around a core of the housing.
Figs.4~, B, C show in detail a housing 6 of the female member 2 which is shaped in cup as a whole and projected at a rear part with a tube connecting mouth 40 and formed central-ly with a blood path 41 as well as a female connecting tube 42 at a center of an inner part.
The female connection tube 42 is formed with a concave 42a at its end to which the end portion of the male connec-tion tube 30 has access.
The housing 6 is formed with a flange 43 on the outer circumference in the opening side, which is opend with engag-ing holes 44, 45 corresponding to the hooks 31, 32 of the housing 3 of the male member as shown in Figs.4B and 4C, and the hole 44 has a larger width W3 than W4 of the hole 45.
The housing 6 is formed similarly as mentionad above, at its rear part, with a plurality of bonding agent pouring holes 46, 46 passing to the interior of the housing, and is 10~ 72~

formed, at its inner wall, with a bonding agent guide groove 47 which communicates with said holes 46, 46, and is also composed of a circular groove 47a and a plurality of grooves 47b extending in length of an inner circumferential wall of the housing and in length of an outer face of said communi-cation tube 42.
Figs.5A, B, C show in detail the large diametered key rings 4, 7 which are formed with a concave 50a and a convex 50b by cutting out a half part of a circumference at an end of the tube body, and the convex 50b is marked with scalings 51 which are each marked per, e~g. 5 circumferentially around a core of the housing, as similarly the scaling 37 of the housing 3 of the male member.
Figs.6A, B, C shows in detail the small diametered key rings 5, 8 which are formed with a concave 60a and a convex 60b by cutting out a half part of a circumference at an end of the tube body, and the convex 60a is formed with a project ed flange 61. The small diametered key ring 8 is to be incorporated in the housing of the female member, and is inserted with a seal packing material 9 as shown in Fig. 1 so as to contact to said flange 61.
A further explanation will be made to one example of setting-up of the above mentioned connector.
At first, as shown in Fig. 7, the housing 3 of the male member 1 is inserted with the large diametered key ring 4 and the small diametered key ring 5, and a convex cutout 60c of the small diametered key ring 5 is met to one of the scalings 51 of the large diametered key ring 4, and one of the scal-ings 51 of the large diametered key ring 4 is met to one of the scalings 37 of the housing 3. If the scale is slided one by one, combinations of 72 x 72 x 72 = 373248 (the scalings are marked per 5) are obtained in total.
The key rings 4, 5 are adjusted in positioning of the angular rotation, and the bonding agent is poured into the hole 35. The bonding agent flows from the guide groove 36 into between the outer circumference of the large diametered key ring 4 and the inner circum~erence of the housing 3, and between the inner circumference of the small diametered key ring 5 and the outer circumference of the large diametered part 30a of the male connecting tube 30. It becomes hardened as flowing so that the key rings 4, 5 are secured to the hous ing.
On the other hand, the female member 2 is also inserted, in the housing 6, with the large diametered key ring 7 and the small diametered key ring 8, and the rotational angle is adjusted such that the key rings 7, 8 are fitted with the key rings ket rings 4, 5 with respect to the concave and convex, and the bonding agent is poured into the holes 46, 46 of the housing 6 so as to secure the key rings 4, 5 to the housing 6 similarly as the male member 1. When the small diametered key rings 5, 8 and the large diameterd key rings 4, 7 are met a tube has a double layer.
In the above embodiment, the connector comprises the large diametered key ring and the small diametered key ring, but if kinds of the combination may be reduced, either one will be omitted, and if many kinds are re~uired other key rings will be added.
The bonding agent guiding grooves 36, 37 are not limited ....

12 ~æ~5 to the shown ones, but any types will be enough if the key rings are exactly secured.
For materials of the housings or key rings, synthetic -esins excellent in suiting to human living bodies are preferable, for example, polycarbonate, polypropelen, vinyl chloride or the like are used. Fox the seal packing material ru~ber or elastic synthetic resin are used.
Fig. 8 shows an embodiment where the connector of the invention is applied to a plasmapheresis bag system.
A blood tranfusion bag 80 is connected to a blood plasma separating bag 82 via a connection tube 81, and to a blood restoring tube 83 and a blood guiding tube 84. The blood restoring tube 83 is, on hal way, connected to the connector 85 of the present invention, and a tube extending therefrom is connected to a Y-tube 86a which is connected to a tube 87 having a physiological saline solution guide needle ~Oa and to a tube 88 for mixing the blood and the physiological saline solution.
The mixing tube 88 is provided with an instillation tube 89, and a tube extending therefrom is connected to a Y-tube 86b which is connected to a tube 91 having a blood guiding neelde 90 and said blood guiding tube 84.
In the same, numerals 92a, 92b, 92c designate flowing amount adjusting clamps, and the numerals 93a, 93b designate communication pieces.
The above plasmapheresis bag will be referred to in its usage.
When the blood drawing bag 80 is positioned above a blood doner and the needle 90 is pierced into his blood tube, '~

the blood is guided to a blood bag 37 via the tubes 91, 84.
Then, the clamps 92a, 92b, 92c are closed.
After a determined amount of the blood is guided, the tube 84 is closed with a welder and cut off, the connector 85 is divided into the male part 1 and the female part 2, and they are shielded with caps for preventing from the air.
If the bag 80 supporting the blood is subjected to a centrifugal separation together with a blood plasma separa-tion bag 82, the blood therein is divided into the blood component and the blood plasma component.
Subsequently, the communication piece 93a is cut off to transer a supernatant blood plasma component in the blood bag 80 to said bag 82 via the communication tube 81.
The communication tube 91 is closed with the welder, and the blood bag 80 and the blood plasma bag 81 are cut off.
The blood component only remains in the blood bag 80, and this blood component is returned to the blood donor.
The needle 90a is pierces into a container (not shown) enveloping the physiological saline solution, and the clamp 92a is released opened so as to guide the saline solution in the blood returning circuit 95 for performing a priming therein, after which, the needle 90 is again pierced into his blood tube, and the female member 2 of the connector 85 pro-vided at the blood returneing tube 83 of the blood bag 80 is connected to the male member 1. Said circuit 95 is composed of the male member 1, the needle 89, the tube 87, the mixing tube 88, the instillation bag 89, the blood needle 90, and the tube 91. The key rings 4, 5 of the member 1 and key rings The key rings 4, 5 of the male member 1 and the key rings .

7, 8 of the female member 2 are arranged in proper positions per each of lots so that they are connected each other. Since the housings 3, 6 are so controlled that hooks 31, 32 are engaged with the engaging holes 43, 44 and in case of the blood bag 80 of the blood donor, the male member 1 and the female member 2 agree to each other, otherwise the both are not met.
Therefore, by the agreement of the both members 1 and 2, an identification of the blood donor and the blood component may be checked.
If the communication piece 93b and the clamps 92b, 92c are opened after communication of the male member 1 and the female member 2, the blood component in the bag is guided to the blood returing circuit 95, and it is completely mixed with the saline solution and diluted, and returned to the blood donor The connector of the invention may be, of course, applied to (a) plasmapheresis bag provided wi~h more than two pairs of a blood bag - a blood plasma bag, and (b) plasmapheresis bag provided with more than one pair of a blood bag - a blood plasma separating bag - a small bag, other than the plasmapheresis bag as shown in fig. 8.
Figs.9 and 10 show another embodiment of the invention, and the numeral 101 is a male member and 102 is a female member.
The male member 101 comprises a housing 103 and a pair of large and small key rings 104, 105. The housing 103 is ~ormed at its center with a connecting tube 106 to which a seal ring 107 is mounted. The housing 103 is provided, on an outside, with a hook 109 having elasticity in vertical directions, and ~72~i~5 connected, at a rear part, to a fluid tube 108.
The large diametered key ring 104 is fixedly inserted with the small diametered key ring 105 therewithin. The key rings 104, 105 are formed with concaves 104a, 105a and convexs 104b, 105b by cutting out the half part of its end part. The small diametered key ring lOS is inserted into the large dia-metered key ring 104 by sliding the concave and convex in the circumferential direction per each of the products.
- The female member 102 also comprises a housing 110 and a pair of large and small key rings 111, 112 similarly to the male mermbe.
The housing 110 is formed centrally with a communicating tube 113 into which an end portion of the communicating tube 116 of the male member, and is formed outsides with an engag-ing part 114 at a position corresponding to a hook 109 of the housing 101 of the male side, and further connected at a rear side with a fluid tube 115 communicating with the connecting tube 113.
The large diametered key ring 112 is inserted with the small diametered key ring 111 therein, and those are fixedly secured within the connecting tube 113. The key rings 111, 112 are formed with concaves llla, 112a and convexes lllb, 112b and those correspond to concaves and convexes of the male key rings 104, 105 and are slided in a circumferential direction.
The convexes 104b, 105b of the male key rings 104, 105 are engaged with the concaves llla, 112a of the female key rings 111, 112.
- Fig.ll shows a modified example of an engaging part of the housing. The engagng part is provided with a hook 120 i55 around a fulcrum of a supporter 121, said hook 120 being elastically movable in vertical directions, and being engaged, at its end portion, with a ring shaped groove 122 of the housing 110 of the female side. The hook 120 may be formed at the upper and lower sides.
Fig.12 shows another embodiment of an engaging part of the housing. In adition to the hook 109 and the stopper 114 shown in Figs.9 and 10, a hook portion 123 and an engaging-portion 124 are provided on the lower part of the housing in opposition facing directions. Since the key rings shown in the above embodiments have the same shapes of the male and female sides, mass-production is possible at low cost.
Combinations of the male and the female members are as shown in Figs.13, 14 and 15.
In Figs.13A to C, a female member 201 and a male member 202 are connected to blood tubes 203, 203.
The male member 201 is shaped in cap as a whole, and is centrally formed with a tapered connecting tube 203 which communicates with the blood returning tube 203. An outer cylinder 206 is formed with a cutout 207 at its end part.
Further, the female member 202 is wholly shaped in cap and is centrally formed with a communication tube 205, and its inner part communicates with a blood returing tube 203. The female member 202 is ormed, on its outer cylinder 208, with a cutout 209 at a position corresponding to a projection of said cylinder 206. The outer cylinders 206, 208 are marked with facing markers 210, 210 at their respective facin~ positions as shown in Figs.13B and C. The markers may depend upon any means of colors, engraving or a distinguishing number as shown in Fig.14, or fitting concave and convex as shown in Fig.15.
In the present invention, the markers 210, 210 are slided circumferentially per each of the products, or the markers 210, 210 are given at fixed positions and the positions of the cutouts are adjusted.
Figs.16, 17 and 18 further embodiments of the invention.
The numeral 302 is a male member which comprises a ring 306 of cap shape and a large and small rings 304, 305, said ring 306 being a housing.
The rings 304, 305, 306 are formed with fitting project-ion~ 307, 308, 309, and the ring 306 is projected with a comm-unication tube 311 having a fluid path 310 and is connected to a blood guide tube 303 at its end.
A female member 312 is composed of a cap shaped ring 316 to be a housing, and large and small rings 314, 315 fixed in the ring 306 in correspondence to the male member 302. These rings 314, 315, 316 are formed with fitting grooves 317, 318, 319 corresponding to projections 307, 308, 309 of the male member 302.
The ring 316 is projected with a communication tube 321 having a fluid path 320 and fittable to the communication tube 311, and is connected to a blood guide tube 313 at its end.
Fig.l9 schematically shows a device for setting up the female member 312. This device comprises a base 323 of the female member and a rotational angle adjusting device 322 of the ring, and the adjusting device 322 is composed of a rotat-ional device 328 having three pins 325, 326, 327 and a drive device 324.
Each of the pins 325, 3Z6, 327 is independently rotated , by a determined angle by means of a control device incorporat-ed in the rotation device 328.
The above menioned setting-up device is actuated as under A ring 316 is incorporated in the connector order with the rings 315, 314 so as to make up a female member 312 of three layered stxucture, and this female member 312 is inssrted fixedly in a concave 329 of the base 323.
Then, the device 322 is moved down to insert the pins 325 326, 327 into the grooves 317, 318, 319. Subsequen~ly, under a condition that, e.g., the pins 325, 326 secure the rings 314 316, the pin 327 is rotated at a determined angle so that the position of the fitting groove 318 of the ring 315 is adjusted intentionally.
In the above manner, if the groove 318 of the ring 315 is adjusted in positioning per rotationa angle O = 5, the female members of 72 kinds different in fittings are obtained. When the positions of the Eitting grooves of the rings 315, 314 are adjusted, female members different in fitting embodiments of 72 x 72 = 5184 kinds are obtained, and further when the posit-ions of the fitting grooves of the rings 315, 314 and 316 are adjusted, Eemale members different in fittings of 72 x 72 x 72 = 373248 kinds are obtained. The above mentioned reEers to setting-up of the female member 312, but also with respect to the male member 302, the pins 325, 326, 327 are, at ends, pro-vided with members for clamping the projections 304, 308, 309, and the setting-up may be carried out in the same manner as above. This setting-up is useEul to setting-up of a connector having a key ring in the connecting member, and is of course applicable to the connectors as shown in Figs.1, 9 and 20.

Fig.20 is a partially enlarged cross sectional view show-ing setting-up of rings composing the male and female members.
331, 332, 333 show rings different in diameter respectively.
If these rings are female, the fitting grooves are formed, and if they are male, the fitting projections are formed, though not shown. The ring 333 is formed with concave-convex 334 on its inner part, the ring 332 is formed on its inner and outer parts with them, and the ring 331 is done on its outer part, so that these rings are fitted each other. The spaces of the concave and convex are formed by, for example, each 5 in the circumferential direction. Therefore, if the rings 331, 332, 333 are incorporated in succession, as the concave and convex 334 are slided, the combinations of 373248 kinds are obtained at the maximum.
The usage of the above connector is the same as expalined in Fig.8 where the male member 302 and the female member 312 are in advance connected, and they are separated for use. As shown in Fig.21 the both members are separated, and are housed air-tightly the protector of soft plastic will be broken when they are used.
In such a manner, it is no longer necessary to cap the bag against the air, after the blood of a determined amount is colleted in the blood bag, and the working is very hygienic.
The connector 85 shown in Fig.8 is in advance divided into the male and female ones, and they may be maintained air-tight.
Further in the invention, as shown in Fig.22, a seal 354 is pasted to a connection between the male and female members for checking confirmation.

~i5 The seal 354 is centrally perforated in wave and checking letters or figures 356 are printed symmetrically at the per-Eorations 355. The seal 35~ is attached in alignment with a connecting line 357 between the male member 302 and the female member 312.
If the seal 354 is pasted on the outer circumference by sliding the position per each oE the connectors, and when the female member and the male member are different in kind, the letters 356 and the perforations 355 are not met so that the identification could be easily seen.
Figs.23 and 24 show a modification of the embodiment of Figs.16 and 17. The nuneral 362 designates a male member having a three layered structure by laminating three kind rings of different diameter.
The rings 364, 365, 366 are formed with projections 367, 368, 369, and the ring 366 to be a housing is provided with a communication tube 380 which is centrally formed with a thin breakable part 382, and is connected with a blood guide tube 363 at its rear end.
The blood guide tube 363 may be extended into the ring 366 for providing the breakable part at its end.
372 is a female member having layers of three kind rings as said female member 3120 The rings 374, 375, 376 are formed with grooves 377, 378, 379 fittable to projections 367, 368, 369 of the male member 362. The ring 376 to be a housing is provided with a needle member 388 at its rear part, which is composed of a root 385 having a flange 383 and a needle tube 384 to be connected to said root 385, and the root is connected to the blood guide ~72~

tube 373.
The male member 362 and the femnale member 372 are set up in the same process as said male and f~male members 302 and 372, and finally the communication tube 380 and the needle 388 are furnished.
The male member 362 and the female member 372 are capped on the communication tube 380 and the needle member 388, and each of the members is independently protected as shown in Fig.21, and applied to the plasmapheresis bag.
For use, the cover or cap are taken off, and the projec-tions 367, 368, 369 of the male member 362 agree to the grooves 377, 378, 379 of the female member 372. Only when they are fitted (when the blood donor and the blood component to be restored are identified), the needle 384 of the female member 372 pierces the breakable part 382 of the communication tube 380 of the male member 362 Eor introducing the blood to the returning circuit.
Each of the above mentioned embodiments is listed for example, and actual structure may be modified within claimed range. For instance, the composing elements of the male member are furnished to the female member, and the correspond-ing composing elements of the female member are furnished to the male member.

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a plasmapheresis bag set for drawing blood in a blood bag and extracting a required blood component, and subsequently restoring the blood com-ponent remaining in the blood bag, a connector provided on the half way of a blood guiding tube of said set, comprising a male connecting member and a female con-necting member, wherein the both connecting members are fabricated with a plurality of laminated rings, the plurality of said rings are positioned coaxially, and each of the rings is fixed to prevent from rotating, the rings of the one connecting member are formed with projections, and the rings of the other connecting member are formed with grooves corresponding to said projections, and the projections and the grooves are fitted only when the male connecting member and the female connecting member are connected.

2. The device as claimed in claim 1, wherein the one connecting member is provided with a liquid needle, and the other connecting member is formed with a thin part for sealing a flowing passage, so that the needle breaks the thin part for opening the passage when the both connecting members are connected.

3. The device as claimed in claim 1, wherein a housing of the one connecting member is provided with a hook means, and a housing of the other connecting member is provided with an engaging part corresponding to said hook means, and the hook means and the engaging means are connected only when a pair of both members are connected.

4. The device as claimed in claim 3, wherein the housing is provided with a plurality of hook means, and the other housing is provided with a plurality of engaging means corresponding to the hook means, and the sizes of widths of the hook means are different, and the sizes of widths of the engaging means are different in correspondence, whereby the both connecting members are connected at determined positions in the vertical directions.

5. The device as claimed in claim 1, wherein seal packings are provided between the fitting parts of connecting tubes of the male and female members.