SE0850084A1 - Anastomotisk medicinteknisk produkt - Google Patents

Description

IS 25 2 ascending aerta in cerenery artery hypeee surgery, perticuiariy in eerhecceee CABG surgery. A fåret aspect et the invehtien inciudee e vescuiar eneetemeeis etepie. A itret confrgnretien has twe parts: an eneher member, terrning the attaeh~ ment with the target veseei wait and e eeupiing member, terrning the attachment with the hypeee gren veeeei. The anastemesie ie cempieted hy the counting rnenther, with the draft veesei attached, inte the enchor member. A eeeend eeniiguretien combines the function ef the ancher rnenther and the ceuhiing nrernher inte enepiece eneeterneeie stapie.

This device requires that the eenpiing member during the operation hee te he attached te the grett veseei, which might he tirrte censurning. Furthermore the attachment et the counting member te the grett veseei requires iarge preeisien end eidii ironi the eurgenn in erder te niinimize the risk ter ieeking.

US 6 524 322 diseieees en enasterneeis device ter jeining veeseie, in the tiret piece jnining ene end ot e gratt veesei te a target veeeei at en nnening rnede in the wait thereet. The eneetemesie device cdrrrpriees e tu huier body en which en enter iiange, which cernee inte cnntaet with the outside et the wei! ot the target veseei areund the opening, end en inner iienQe, which comes inte contact with the inside et the wait et the target veeeei around the opening, ere errenged. The inner tiertge ie made un nt e number ei errne which ere ehie to rneve frem en extended peeitien, ieceted in the extensien et the tuhtiiar body, under the infiuence of e pre tensien inte e peeition extending in the iaterei direetien with respect to the tuhuiar hardy, efter the pretensien hes been reieaeed, in erder te terrn the inner tienge.

Aten this devirze ineiudee the sten et' etteching the tnhuiar counting body to the graft veseei during the operation end thus enteiie drewheeke ef eirniiar kind es these reiating te US 6 iii 321.

The ohjeet ei the present inventien ie te prevíde en anestomesie device for end te side eneetentnsis hetvreen e grett veeeei end e naturai veeeei in the human hedy which reddcee demands on time and eiriii ef the surgeen es tar es eoeaihie and nvereernes the drewhecirs reieted te prier ert attempts in this respect.

Summary* of invenrinn The object of the inventien is achieved in that an anesternesia device of the kind initieiiy specified insändes the specific features thet et ieeet e tiret et' seid ende ie provided with e ring-Shaped counting unit integrated with the tehuier hedy NJ u: u: Ca 3 and having connectinn means arranged for counting in a compienientary ring- shaped counting unit.

Tha cievice raciicaiiy reducera the nnmhiexšty and time when inining a grnft vessei to a naiiirai hittad væssni ar the titta in cørhparisøri with traditirsnai surgery.

Furtherrrinre a minimum ut pinces are required tor the anastomnsis, oniy hun pinnen ara requireä, narneiy the grått vessei and an attachment :initiera at tha target vesaei. The iirnitefi nunthnr ni pinnen required iteaüs in a very secure and rapid cineration, which makes thre reqtiiremnnt on sitiii and nxpnrienfte ni the sur~ genre tens crucziai. Since the cniipiing unit for attaching the gratt vessei tr: the target vessni is an intngratnri part nt the grait vessei itseii, the need inr attaching the gratt vessæi in a counting unit is eiirninateü whisn further redunes the nnhratinn time and the risii: inr mistakes. As sann as a chmpiernnntary counting unit is attached tt: the target vessei oniy a simpie ping-in sten is requireci. the device is narticiiiariy stiitahie inr nnwtrnsirin anasiontasis but it is in be uncir-:rstonci that it aisn can he anpiiad inr enä-tn-end ahastnrnnsis where a grait vessei is irivnived.

With "sornpierneritary" is meant that the cnupiing units match each nther such thai they tngnther forms a tight counting, ng. the cnuniing units are ut main and fnntaie type, respectiveiy, Accnrding to a preinrrtid ernhndimerii aisn the seccind anti n? the graft vessei is prnvidnd with a secnhti ring-shapnd couniing unit integrated with the ttihutar body anü having nnnnnctinn means arranged inr cnitpiing to a cørnpiemerh tary ririg-snannci cnupišng.

This emhodirnent aiinws a correspnnding simpin and :inte ccnnectinn at both enda nt the gratt vessei with a respective target væssei.

Accnrding in a further preferred nmhndirrient the first and ancoriri counting units are nither iáentinni ar cømpiernentary.

This emhndirnent further sitnpiifies the device and the operatiøn when æappiying it, dun in the uniinrrn cnnstructioh. 'thus the attachment stieps when attaching the enda of the gratt vessei in a respacztive target vessei wiii ha :airnnst the same.

Acrznrdihg in a further enfihridirrrent the tuhuiar hndy inciucies at iæast hivo separate tuhiriar snctinns and at ienst finn intercnnneciion device, each iniercøw necticin device having a first and second ring-shaped counting part, each being 220 h.) 1.:: Ii Ü 4 intngratnü with a respective tubuiar unit, and the twr: ring-shaped cøupiing parts of the intercønnecišon device being ræieasabiy intercnnnncind.

The iengih required inr the grait vessei is diifnrent inr diiinrent kinds of appiications in the hurnnn hndy ann rnay aisn van; inr the same kind nt operation 'ironi nnn parsnn in another. The iength e? the graft vessei thus is to bn adapted in the actuai cnnditinn. With a grått vessæi huiit up by a piurniity oi seetions accørding in this enihødirnent a vnry sirnpie way ni anapting the iengih is friterad, The surgeøn rnereiy has to ttisnngagn the ræinasabie intercnnnnction ánvice in have a shnrtær gran vessei, thnrehy any need tr: cut the gran vessei inte the appropriate iength in eiirninatnd.

Accnrtiing to a further preterreci enibodiment tha first ring~shaped part ni the intnrconnnctiøn device is icienticni to the ring-shnpnd unit attached ts said first and and in that the secnnn ring-Shaped part ni the intercnnnæciinn device is identi- cat in the ringæhapntai unit attached in said sncnnd anti.

This ærnbndimnnt has the advantage that ii the surgnnn finans in shnrten the grnit vessei hy saparating a portion thnrnni this portion witi have its tina nncis irïenticai in the czcirnpintn grait vessai.

Arzcøráing tr: a ttirther preferred ernbndiment the cnnnectinn means ni each ring-stannad counting unit is either rnaie connectinn means cr temnin cnnnectiøn means, the main cnnnnctinn nia-rann inrziutiing at inast ivrn axiniiy extnnding members, each member having n tree enn, and the tranaain cznnnectiøn means insättning at iaast tvvn axiaiiy directeri recaiving ønenings, the axiaiiy riiirected recniving npenings ut a ientaie cnnnectinn means being arranges før axiaiiy receiving the free enda of the axiaiiy extending members n? a main sanne-ar:- iinn means, each axiaiiy extending member being arranged in he ahie in Snap inte: a tracking position in nne ni said ræcnšving :meningar nt a ternaie cnnnectinn means, By nrnvitziing the cntiniing means as a main or 'ir-irnain cnupiing means in this way the cnnnectinn ni the gran vessei in the target vessei having a campin- rrinntary counting unit can ha sinne very easy, rapid anti with ntirttrnizeti risk inr ršefauit. When the members have snappeü intn the ræceiving upenings the nxiaiiy Banking eiírninnins the risk thai the grait vessei wiii innsen irnrn the nnupiing unit of tha gran væssei.

Accorfiing tn a further preferred ernhndimnnt nt the inventitin an anastit» rnnsis systern inniuáes a gratt vassa! according in the inventinn, in narticuiar in 15 26 5 any nt the preferred eniboniments thereet, which systern further ineiudes n Sena» rate ršng-shened ceupiing unit having cnrinection means that is nnmpiementary in the ringnnened ceuniing unit ef the grett veesei.

Therehy a cernniete systern inr the cnrinectinn et a gratt vessei in n target iressei is provided. Prnviding n system incitiöing hnth the cnmpnnenie eiiminates any risk for rnienfiatch between the nnuniing unit et the grntt veesei and the ring» shened unit to which it ie te he cenneeted.

Actzerding in a further preferred emhedirraent the invented systern ineiutzies that the separate ringehapeü cnnpiing unit inciuties ræenetratien means arranged te nenetrnte the wait et n vessei for atiaching the separate ring~ehanen counting unit to the vessei. this way of attaehing the eenarete ring-shared cnuniing unit is time effective and eiiews n very secure attachment.

Actzerding ie a further preterreri embeciiment the nenetretinn means insändes n veesei receiving surface inciuciing en area having e rnnghneee with a inrge number nt srnaii share nrnjeeišnne errahged tn nartiy nerietrate the wait et said veesei withnut teaching thrnugh said wait.

Since the nrnietztinns tic net cnrnnieteiy reach iiireugh the wait they ifviii not reach the inside of the connecteti vessei enci there wiii he ne onening tecing the interier of the veseei that cnuid cause inieetien nr the iiite. With a iarge number ef such stnnii nreiectinns the eenneetien wiii he sutiicientiy Streng aithough each nrniectien reachee nniy partiy thrnugh the wait. Ey a iarge ntsrnber in this applica- tion ie meant hehfveen 5G and 'iü ÜÜÜ. “the aheve specified preierreti embodinients are set ont in the tiependent ciaime.

The inventinn wiii he further expieined hy the feiinwing neteiieti tiescriptinn nt exemniee thereni ann with reference ine the accernnenying cirewinge.

Sršef finseniptien et' the ürnnfinge Fig. 'i is a eine view of e gratt vessei eecertzting in the inveniien.

Figr 2 ie en end viiew e? a eenarete cnupiing unit accerning in the inventien.

Figfåi is en eninrged perspective vieiir' nt a part of the greft vessei ni tig. i.

Fšg. 4 ie en eriiargeci perspective view et the unit nt tig. 2.

Pig, 5 ie en end view et tig. 3. 30 ß Fšg, 8 Fig. 'F is att ehierged perspective view of a deteši of tig. å. is en ene view simiiet to that et* tig. 5 but showing en eiternative exampie. ie a perspective view et e part et the unit et tig. 3 eeeertiing te e stiii further exathpie.

Fig. 9 ie en ehiarged section threugh ctetaiie in tiga. 3 and 4.

Pig, 19 ie e section eimiiar te that et tig. Q but šiiustreting en eiterraative exemete, Fig. 'ii is a side view of a grett veeeei aceereihg te a further exemeie et the ihvehtieh.

Fig. 12 is a side view et e grett veseei eceerdihg te stiii e iuither exempie ef the irwentieh., üeteitee eieeertptien et" exempiee Fíg. 'i in a eiée view iiiuetrates e eevice according te e first exampie ei the irwentiøn. The eeviee ihciudee e grett veeeei 3 having a tuhuier hedy 4, The tube- tar betty 4 et' the grått veseei 3 is et eerwehtienei type and is made of reinforeed PTFE, eg. Dreeen “i of Geretex “i . At ene ei the enes the tuhuiar bedy å has e rihgehapeá eeupiihg unit 2 which ie attached te the tuhuiar boáy 4. The coupiihg unit 2 eefi he matte ei titehium of e suitebie pieetie, and ie preterabiy giitee er weided te the tuhuiar beöy e. Atternetiveiy the eeupiing unit 2 ie attached with same kind et teetehihg devices to the tuhuiar betty 4.

The ceupting unit i is previcted with teur axiaiiy extenttihg epenihgs 2% en the side thereet iaeing ewey frem the tuhuiar hedy 4. The eperiings 298 are rrangee to receive tehguee frem e eempiemehtary ringehapeci ceupiihg ae wiii be eeecrihect iater.

Fig. 2 iiiuetretee e target veseei V te which the gratt veeeei ie te be een» nected. A separate rihgeheped eeuptihg unit “i ie etteehee te the target veeeet V.

The separate ršhgehepefi eeiipišng unit “i has four exiaiiy directed tehguee 'itiâ metehihg the epenirigs 266 ot the ceupiing :mit 2 ei the graft veseei.

When en eheetemeeie operatien ie te he rheee the eufgeeh makes en ihcisien ih the target veseei V end attaehes the separate coupiing unit ”i ereund the hete. Thereetter the greit veesei 3 ie cenheeteti to the separate eeueiihg unit i hy shapping in the tenguee 'iüiå of the separate eøupiing unit i inte the exšai opehings 2% et the meeting unit 2 et the gratt veeeei. 10 3G T Fig, 3 is an aniargad perspective view at a part ot tha gran vaaaai 3 with tha ring-ahapad counting unit 2. Tha caupiing unit 2 has a hady 201 that is genaraiiy cyiinëricat, and has a rear part 202 and a front part 2Ü3, tfrhara tha trnnt part 293 han aiightiy iargar outar diameter than the rear part 292. in tha iituatratad arnhnttšrnant tha unit ia nirsuiar cyiindricai, hut nthar cytincšriaai ahanaa, ang. aiiinticai cyiinrtricai ara pasaihia and in aorna inatancaa aven preferred trnrn a functinnat nhyaiaiagisat perspective. .

At the ange at tha frnnt part âtšåa tnur axiaiiy axtanrting npaninga 2% ara prnvidan. Tha nurnhar at npaninga can vary, but in rnaat cases faur onaninga äs anprnpriata.

Pig. 4 ia an aniargad perspective: viaw af the separata counting unšt t. Aiao this unit haa a body ttti that ia ganaratiy cyiinctricai, and has a raar part tü2 and a front part 163, tha trunt part 103 having a atightiy iargar trutar nian-ratar than tha rear part tüâ. hiaana for cnnnanttng tha separata cnupiing unit t to tha gratt vassai counting unit 2 axtand suhstantiaiiy axiaiiy fram tha trnnt adga af tha frnnt part tültt This rnaana cansiata ot axiaity axtanding tnnguas tüå. Tha nunrhar nt tnnguaa tttfi cnrraspanda tr: tha numhar af rspaninga 25th in the gratt vasaal cauniing unit 2, ana the antas aaatiønai shape nt aaah tnngua ganaratty curraanunds tu tha ramsa sactiunai shape at aaah sanning 295.

Tha separata rznuniing unit 'i ia tu ha attachad to tha target vasset V attar a hata has hear: rnada in the waii crt the target vasaai V. Than the surgann puiis tha watt edges arnunrt tha hata thrnugh tha unit trorn åta rear aina untii raaching tha front sina. Than tha edges are tnidad radiaiiy autwarda svar a vaasai racaivšng and surtaca 120 nn tha unit t, it ia preferred ta avoid a aharn adga between tha hota ana the and surtaca nn which the vaaaai racaiving and surtaaa 129 is iacataci. Tharatnra tha aytindriaai wait nt tha hata ia ccinnactatí to tha and wait hy a curvaa an: partinn when aaah in a sactinn through tha iangitiictinai axia ot tha unit. Pratarahiy the curvari an; nnrtinn ia a nirauiar an: nartinh. Tharahy stress nn tha vaaaai is reduced and the risk at any nutting atfact an the vaasat wait in atraiciact.

Fig. 5 acherraaticaiiy itšuatratas tha vassai racaiving surface 1211) tocatan an tha axiai and wait af tha first attachment unit t. 15 2G 25 39 8 On the ractiaiiy inner part etthie surface “iâü there is an eree 121 that is rnugh, the roughness being created hy a ierge number oi short and share preiectšcns. in figure ß these prdjectiens 122 are enierged iiiustraterzt The height et' the preieetiens 122 is in the range ef 13,135 ~» 1,9 min, preferahiy in the range et 9,1 - Gfå min.

When the waiie of the target vessei around the hete ie teided nutvtferdty across the surface 129, the han nt the veseei weii which therehy centacts the area 121 wii! he partiy penetreted by the nrejectinns 122 such that the vessei ie attached to the unit 1.

The height of the prejectinns 122 in the prescrihed range resuits in that the prnjectinne de net reach att the way through the vessel wait.

Fig. ? iiiustretes an aiternetive exarnpie of arrenging the vessei reeeiving surface 1211 in this enihediment the area with the projectiene ie cdnetituted by e number ni Eintited areas 121a to 1211.

Fig. 8 iiiuetrates an exampie where the vessei reneiving area 121 with the nrojentions 122 ie iecated en a separate ring member 123 which ie retatabie in reietinn te the feet of the front part 103 et the separate nnupiing unit “ii Fig. 9 ie a schema-ätit: sectinn through the end ot one tongue 196 and one dpening 2% and iiinetratee the snapeetien and tracking., Ae eariier described the end of tongue 166 has a radieiiy efiset part 10? terming a sheuider 108. One wait et the epening 298 in the seeend unit 2 is provided with e cnrrespending radiaiiy oitset part 2G? terming e shnuider 263.

When the end et the tengue 'iiiß is inserted te the opening 296 as indice- ted by the arrnw in the tigure, the radiaity niiset parts 107, 2G? forces the end ei the tengue 165 to he iiexed te the iett in the figure. When the shnuider 188 of the tengue 106 hes passen the sheuider 208 nt' the enening 206 the end nt tnngue wiii iiex back again and Snap inte e teckning pneitien where the ehouiciers WS, 205 ebut against each ether end inch the units against axiei eeperating rnevenrient.

Fig. 10 iiiuetretee in a cerreeponding section an aiternetive shape ei the tengue 106 and the npening 296. in this case the tongue 106 at ite enter end is serrated and thus has a eaw~tneth prntiie 19% for ceoperetien with a correepnndfl ding eew-tentnprntiie âüïh en dne weii ot the opening. Therehy the tightnese of ti. 20 å the connection een he eeieetett hy the eurgeen. Aiternetiveiy eniy either the tengue er the opening weii een he eerretett and the rather having eeieiy one shnuider. in the exernpie iiiustretett in fige. i te 4, the enirpiing unit 2 et the grett veesei 3 ie of teninie type and the eeeerete counting unit t ie nt nteie tyee. it ie et course poesihie with e vice veree arrengentent, Le. the cenpiing unit 2 nt the grefi veeeei 3 ie provided with tenguee and the separate eeupiing unit ie provided with the exiei epenings. it is eiso peseihie tr: errenge have tengnee and two epeninge en the grett vessei eeueiing unit end correependingiy tvve epeninge end herre tenguee en the eeeerete counting unit, such that eeeh unit hee heth temeie end rneie eeupiing members. in thet case the tvtfe units can he identieei with respect te the arrange- rnent et the ceupiing members.

Fig. "ii iiiuetretee en eiternetive exernpie et the grått vessei 3. The right ene thereot ie sirniier te the example of tig. i. in this exerneie hewever, eiee the other enci hes e ceupiing unit ä. 'the ceupiing unit 5 et that end ie in the iiiuetrated exernpie crt the rnaie type. Aiterrietšveiy hnth the eeupišng units 5 et the grett veesei can he et the eerne type, either mete er ternaie. The ceupiing unit 5 is errehged ter connerztien te e eecend separate ceuriiing unit that has been atteehed te e veeeei in the body in a manner sirniier te that described in connection with tig. 2.

Fig. 12 iiiustretee e further eiterrietšve exernpie et the inventee gratt veeeei. in this case the greft veseei cnnsiete et three separate tuhuier seetiens na, rih, 4:3.

Like in the exempie et tig. 'ii the grett veesei hes e enupiihg unit 2, 5 et each ene thereei. The sections ere cennectee hy two irttercenneetšene eevicee ha censiet nt have ring-sheped parts âe, še attached te e respeetive tuhuier sectien åh. ee.

The ringeheped parts Be, Sa et' the interconriectšon nevice ere eirniier to the ring-ehepeci ceupiing units 2 and 5, respectiveiy at the ende et the grett veeeei 3. The time parts ei the ihtercenneetien device thus ere ceupšeti te each ether in n maie-terriaie reietšenehip and can he reieeeed trern each other. The eurgeen thus een reieeee either et the eennectinn devices êe, öh in order te ehtein e iength of the greti veeeet that eerrespentie to the ectuei need, it ie to he uncieretend thet the number ef eectiens net neeeeeariiy is three. The grett veeeet een he cnnetštuted hy hire eeetiene er rnore then three sections. “ÉÜ Ahnvs han been descfibefi an nperaïšon where ene end af ïhe graši vassa? is attached to inn target vessnš in an ænd-inæšde anastnmcsâs, it is ts be under- stand that the šnvenïecš deviae can be used fnr ændflln-end anasânmøsšs as weêë.

Aštncsugšw ine invented æíevšce is parâšcušaršy usefui fin" asrnna arten; bypass gran aurgæry ii: is in he undnrsïncd that ii can be appššæd näsa for nånn: känn m' anasiømnsis e? hånad vnssæis as xvešš as før cannectšng miner vessešs än tha bßáy tngeïhef.

Claims (3)

1. ES 39 “åt CLAÉMS 'L An enaetemoešs device šncšucššng e grett vessei (3) having a tuhuâer hedy (4) With hva open ende ehefecteršzed En that et Beast e first ef seiá ende ie prevšded tväth e rihg-eheped eeupåihg unit (2) šrttegretee with the tuhušer heey (4) end having cenheetšen means (ššüöš errehgee fm eeupiihg to a cempšemehtary ršng-sheped ceupššng unit.

2. A det/Bee according to eâeim t, eherasteršzeü En that atse the seeøhd end is prevšded with e seeehd ršhg-ehepee eeueišhg uhšt (5) integrated wšth the tuhuief bedy (4) and having cennectâen means (166) arrenged ter ceupiíng te e cemeáemehtery ršhg-eheped ceupåšng unit.

3. A device eceerdšng te ciešm 2, eherecterized åh that the râhgeheped ceupššrtg units (2, 5) et the first and secxcnci ende ere either šdenticeå er cemptementery. ite A devâce esserdšng te ciaím 2 or 3 eherecteršzed En that the tubušer heüy ie) Ehciudes et least twe separate tubuiar (ee, 4h, 4:2) eectíene eefi at test ene ânterconneetion device (êa, öh), eech intercehhectšoh devâce having e tíret (âe, åh) and eecehct (Se, Sh) ršng-shepeü eeupišhg part. each being šntegretetzš with a res» pective tubuier seßtíen and the tvve ršng-eheeed ceeeišng parts heâng rešeeeehty šhtereonheßtetí. 5. A device eccercššrag to ešašm 4, ehafacteršzee än that the first ršng-shepeci part (Be, Eb) et the šnterconnectšen áevšceäša, Sh) äs šfzšentšrsei te the rEng-shepecš unit attached to said fåret ene end in that the seßenti rihgehepeü unit (ša, Sh) et' the interconnectšon devštze äs šdentšcei to the ring~sheped unit íšf; etteehee te said secend end. ä. A eevšce according te ehy of câeim “ä ~ 5, cherecteršzefi in that the coh- nectíert means (195, 2%) ef each rihgeheped couphhg unit (t, 5) is either mete eehhectien means (195) er femeše cøhneetiøh means (296), the mete connection means (tüß) šrtešudâng et teast twø axšeššy extehdšng rhemhers (tíšöt each member 25 3G 'EZ (tüß) having a fee ene, and the iemeie cnnnection meaneiâüfi) inciuding ei teeei tvve exieiiy difeeten reeeivšhg enenšhgs (23%). the exšeiiy tiirected receiving openings (Råå) ei e ferneie ennnectioh means (Züâ) being artanged for axiaiiy receiving the free ende n? the exieiiy extehding members (166) ef e male connection means (1032: , each exieiiy extenning member (tüfi) being erfengeå to be ehie te ehep inte e Eeeking pneitinn in ene cat sein reeeiving npeninge (äüß) nt a ferneie cnnnectšnn means (2). 7. An enaetnrnneis system eheraeterizieà in that the system ihciudee e gran: veeeei (3) according in any ef niešms 'i - å and e separate ršng-shened cnupiing unit (t i, the separate ringehehed cnupiing uhit having cennestien means (iišfi) that is compiementary te the Connecticut: means (êiifi) et' the ring-ehepeci eeupiing unit (2} et the gratt veeeei (3). 8. An eneetomnsis system according to niairn ï, eharaeteïizeá in that the separate ring-shaped counting unit (2) ineiudes penetratinn means (122) errangetš in nenetrete the wait ni e veeeei V for aiteching the separate ringeheperi unit (2) to the veseei. 9. A system accnrding to ciaim S, ehereeterizeá in thet the henetretioh means insändes e vessei receiving surface (129) insättning en eree (tät) having a roughness with e iarge number et* smet? share projeetiene H22) arrangeti te pertiy nenetrate the Wait oi said veeeei V without teaching through sein wait. ti). A method inr aneetomneis veeeeis in human et en enimai ehateeterized hy the steps nt - proviöing e greft veseei with e fåret end having e ring-sheped coupišng unit het/ing cønneetion means, - ptnvifiing a separate ring-eheped enupiing unit, having connection means that is cnrnpiementery te the cennectien means ni the rEng-ehepeci eoupiing unit ef the grait veesei - attaching a secenci end o? eeici grefi vessei to e first veeeei » attaching the separate ringehnpen cnuniing unit in e secnfië veeeei, or te a eeeend niace et the first vessei! L!! 13 - anü cøupåšng togeïhar ïha ršng-shaçßed couøåäng unit ef the graft vasseš and the separate ringshapæd cnupššng unit. 11. A mætšwød aøcordšng te ciaim 1%, characteršzæä En ihat the ïubuâar bødy is prøvided with a second ring-Shaped coupššng unit atàachefš to the secxmøš em thereof, whšæh second ringshapefi cøupåâng unit has cønnecïian means arfanged for ceupiing im a cnmpšementary ringshapeá cnupšäng, and En thai the step af aïtachäng a second end ef said graf? vessai m a fšrst vessæi insändes ihe substeps af ~ aäachšng a separate ring-shaped coupiêng unit ia sašd firšï vessaš, aná coupišng tngather âhe sæmnü ring-Shaped coupšâng unit of the grafi vessaš and me secnnd äeparata ršng-shaped cøupåing, 12. A mathød acccsrding to clašm 11 characteršzed än thai the prøvided grafï vessaš šnaiucšes the features of cšaím <1 and thæ method insändes tha step n? - rešeasing one a? saicš šntercannectiøn paris thereåæy separaïing the grafi vessei inte two ßhørïer grafi vesseâs. ~ and ufiišzšng une of saëd shørâer grafi: vessæâs as tha grafi væsseå fm the anasâømcmsšs. 13. peršcermed hy using a system accorfiâng ta any of aêašms 7 «- 9. A method acsoräšng ia ciaim 11 aharactæfšzeä är: that the methmi äs