WO1999008603A1 - Temporary vascular seal for anastomosis - Google Patents
Temporary vascular seal for anastomosis Download PDFInfo
- Publication number
- WO1999008603A1 WO1999008603A1 PCT/NL1998/000430 NL9800430W WO9908603A1 WO 1999008603 A1 WO1999008603 A1 WO 1999008603A1 NL 9800430 W NL9800430 W NL 9800430W WO 9908603 A1 WO9908603 A1 WO 9908603A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet material
- vessel
- medical device
- sealing
- gripping element
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00557—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated inflatable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00646—Type of implements
- A61B2017/00659—Type of implements located only on one side of the opening
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00646—Type of implements
- A61B2017/00663—Type of implements the implement being a suture
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B2017/1107—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis for blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B2017/1135—End-to-side connections, e.g. T- or Y-connections
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B2017/1139—Side-to-side connections, e.g. shunt or X-connections
Definitions
- the invention relates to a medical device for insertion into a blood vessel through an opening in the wall of said blood vessel, the device comprising a flexible sheet material having a length dimension and a width dimension, the sheet material being foldable in the width direction for placing the sheet material into an insertion configuration and the sheet material being unfoldable to assume a sealing con- figuration inside the blood vessel for a traumatically contacting the blood vessel wall in a sealing manner, the device further comprising a gripping element on its outer surface.
- an occlusion assembly for sealing puncture openings in blood vessels is described.
- the known occlusion device After puncturing a blood vessel with a needle and introducer sheath and subsequent withdrawal of the needle, the known occlusion device can be inserted into the vessel via the introducer sheath.
- the known occlusion device comprises a flexible sheet material which is attached to a retaining element such as a thread. In the blood vessel, it unfolds to have a surface area which is larger than the surface area of the puncture opening to be occluded.
- the introducer sheath is removed out of the opening in the vessel and by pulling the retaining thread, the sheet material of the occlusion element will come to lie against the inside of the blood vessel wall.
- a retainer ring is placed around the thread and engages with the outer surface of the blood vessel for a fixed positioning of the occluding device.
- the flexible sheet, the thread and the retainer ring are made of bio-absorbable material such that it is ensured that after the opening in the blood vessel has been occluded, these parts will disappear, for example after a few weeks.
- the medical device according to the present invention is characterised in that the flexible sheet material in an untensioned state is curved in the width direction.
- the device according to the invention can be easily and reliably retrieved from the recipient vessel as the sheet material is predisposed by its flexibility and its pre-formed curvature to be folded in the width direction upon exertion of a pulling force on the gripping element, directed generally in the length direction of the device.
- the sheet material is folded when it is contacted by the sides of the opening in the vessel wall.
- the present invention provides an intravascular arteriotomy seal which can be easily inserted into and retrieved from a donor or recipient vessel. During insertion into a recipient artery, occlusion of the artery is required only for a brief moment or is not required at all when intravascular pressure is low. When the seal according to the invention is in place, the blood flow in the opened artery can be resumed and the distal end of the bypass graft can be grafted onto the opening of the recipient vessel without leakage of blood along the seal.
- the sheet material of the device according to the present invention can be withdrawn from the opening in the recipient vessel wherein the device will easily bend in the width direction by contact with the sides of the opening in the vessel wall, due to its flexibility and preformed curvature in the width direction. Thereafter, the sutures can be tightened and the grafting can be completed.
- the device according to the present invention only a very short or no occlusion of the blood vessel upon insertion or retrieval is required.
- the seal according to the invention provides a bloodless arteriotomy for precise (microsurgical) anastomosis suturing without interfering with recipient artery blood flow, with minimal damage to the wall of the vessel and without blocking of any side branches in the vessel.
- the seal according to the invention will be particularly useful for coronary artery bypass grafting on the beating heart, such as for instance described in co-pending patent application WO 97/10753 in the name of the applicant. Because the sheet material of the seal according to the present invention has a preformed curvature in the width direction, the material will have a natural tendency to fold easily in the width direction.
- blood flow in the recipient artery is interrupted by, for example, temporary ligation or clamping of the artery proximal and distal of the connection site.
- the recipient artery is opened (arteriotomy) .
- the exit (distal end) of the bypass graft is connected by suturing (or other bonding method) to the recipient artery. This is achieved by suturing the inside of the bypass graft to the inside of the recipient artery.
- suturing or other bonding method
- Thrombosis at the transition of donor to recipient vessel reduces the cross-sectional area of the lumen at the anastomosis and hence jeopardizes the quality of the distal anastomosis.
- Narrowing (stenosis) of the anastomosis limits the maximum blood flow through the bypass graft.
- a proximal anastomosis In a proximal anastomosis, the entrance (proximal end) of the bypass graft needs to be connected to an artery which serves as pressure source of oxygenated blood.
- a natural artery can serve as bypass graft, like e.g. the internal mammary artery in coronary artery bypass grafting, only the distal anastomosis needs to be made.
- the internal mammary artery is used as free graft or the radial artery is used as arterial conduit and a proximal anastomosis has to be made.
- Venous bypass grafts always require a proximal anastomosis, because their transformation to an arterial conduit requires connection to a source of arterial blood. Similar to suturing the distal anastomosis of the bypass graft, suturing the proximal anastomosis requires interruption of the source blood flow in the vicinity of the proximal anastomos
- Temporary interruption of blood flow has potentially a number of adverse effects.
- interruption of existing residual flow through a high grade stenosis or, when the artery is proximally totally occluded, interruption of collateral flow to the end-organ may impair its function (ischemic dysfunction).
- Third, re-establishment of blood flow after cessation of flow may lead to reperfusion injury and dysfunction.
- Fourth, during the period of completely interrupted flow in ischemic tissues noxious metabolites accumulate. The abrupt release into the circulation of accumulated noxious metabolites from the reperfused area may cause adverse effects elsewhere.
- Vascular surgeons limit the period of flow interruption as much as possible by performing bypass surgery as fast as possible. This requires (a) a still surgical field, (b) absence of blood which obscures the vessel edges, and (c) experience, concentration and manual dexterity.
- the distal anastomosis requires meticulous placement of the needle into the edge of the recipient artery entrance (arteriotomy). If the stitch is too close to the edge, there is the risk of wall tissue tearing by the suture wire. If the stitch is too far from the edge, there is the risk of creating a tissue flap in the lumen of the anastomosis with subsequent risk of suture line mural thrombosis and suboptimal anastomosis quality.
- the present invention obviates the need to interrupt flow in the recipient artery or limits it to less than about 2 minutes, a period which is not expected to lead to adverse effects.
- Coronary bypass grafting Recently, coronary artery bypass grafting on the beating heart has regained interest. Coronary motion can now be restrained adequately with a mechanical stabilization device, as described in WO 97/10753. in the name of applicant. Interruption of the coronary flow, however, in the segment of the recipient artery to be grafted may result in regional myocardial ischemia with ischemic ecg changes, loss of regional contractile function and hence, impaired cardiac pump function. Ischemia may induce conduction disturbances.
- inhomogeneous perfusion of the myocardium may create vulnerability to arrhythmias. Changes in rate or rhythm may impair pump function. Reperfusion may cause myocardial cell injury ("reperfusion injury") and induce ventricular fibrillation which causes immediate cessation of all pumping action.
- reperfusion injury myocardial cell injury
- ventricular fibrillation which causes immediate cessation of all pumping action.
- due to usually well established collateral circulation in patients that require coronary bypass grafting for stable angina flow interruption for 10-20 minutes is remarkably well tolerated without plasma CPK-MB rise indicative of myocardial cell death.
- adequate collateral circulation is likely to be absent and coronary flow interruption during emergency coronary surgery on the beating heart may further damage the jeopardized myocardium. Collateral coronary flow
- clamping or ligating the coronary artery may also block retrograde collateral flow in the epicardial conduit from a more distal side branch to a more proximal side branch which supplies a region which happens to lack adequate collateral flow.
- the coronary flow interruption is not tolerated and the pumping function of the heart deteriorates.
- One remedy is to restore the blood flow and convert the procedure to conventional coronary bypass grafting using the heart lung machine. If the coronary artery has already been opened, emergency conversion becomes necessary.
- Another remedy is to insert an intra-coronary shunt cannula.
- the present invention prevents ischemic problems and hence, obviates stand-by of the heart lung machine.
- Dry surgical field To perform precise coronary bypass surgery, a good view of the arteriotomy edges is required. The presence of blood hampers suturing. Ample collateral flow via perforating branches that happen to be located in the occluded coronary segment produces retrograde flow that wells up in the arteriotomy, obscures its edges and jeopardizes the quality of the anastomosis.
- the present invention restores the dry surgical field and allows conventional anastomosis suturing without leakage of blood owing to the flexibility of the sealing sheet.
- the heart In the standard, conventional bypass surgery, the heart is arrested by perfusion of the coronary arteries with, in general, a cold cardioplegic crystalline solution which provides a perfectly clear view on the arteriotomy edges.
- a useful additional benefit of the temporary luminal arteriotomy seal is the creation of a dry surgical field with unimpaired view on the arteriotomy edges for meticulate anastomosis suturing.
- any manipulation of the atherosclerotic ascending aorta may dislodge particulate, atherosclerotic or thrombotic emboli from the aortic wall. These emboli may block the (micro) circulation anywhere in the body, but if an embolus follows the bloodstream to the brain, the consequences may be particularly serious.
- a slight modification of the earlier described arteriotomy seal according to the present invention, to be used for the distal anastomosis, will obviate the need to apply a side-clamp on the (ascending) aorta for creating the proximal anastomosis of a vein graft or a free arterial graft.
- side-clamping the ascending aorta in an off-pump beating heart CABG patient will locally reduce the cross-sectional luminal area, and hence, will increase resistance to flow.
- the sealing device for the proximal anastomosis on the ascending aorta is the same as for the distal anastomosis, but the embodiment is slightly different.
- the hole in the aorta is not created by a longitudinal incision, but by punching a round hole (3 ⁇ 4 mm in diameter).
- the dimensions of the seal conform to the ascending aorta with an internal diameter 25-30 mm and wall thickness 1- 5 mm.
- the umbilical cord/inflation channel cannula inserts in the middle of the seal.
- the seal is oval or round.
- the inflatable embodiment may be a torus as well ("dough-nut"). Method. After punching the hole, the sealing device is inserted in the hole (and inflated) . Traction on the umbilical cord/inflation cannula may be needed to obtain proper sealing without leakage.
- the aortic sealing device effectively seals the punch hole and permits conventional anastomosis suturing owing to the seal giving way to the needle with little or no leakage. Little leakage will pose no problem, because a clear field is easily obtained by flushing with saline.
- the seal is deflated and retrieved after all stitches have been placed but prior to tightening the running suture.
- the umbilical cord/inflation cannula has a stopping plate or ring/syringe connector to prevent loosing the sealing device within the aorta.
- the intravascular seal according to the present invention comprises in one embodiment a relatively short gripping device on the outer surface thereof.
- the gripping device may be formed by a notch, placed at a specific angle with respect to the outer surface of the seal.
- the notch which may for instance be of a thickness of 0.5 mm and of a height of about 1 mm, the seal can be manipulated during insertion for positioning the seal correctly inside the vessel, and during retrieval.
- an upstanding ridge can be provided on the outer surface within the boundary of the arteriotomy such that the seal may be rotated inside the vessel.
- Orientation markings for instance a grid structure may be applied on the outer surface for proper positioning.
- the stiffness of the flexible sheet material can be greater in the length direction than in the width direction, for example by a midline thickening (longitudinal ridge at luminal side of flexible sheet) .
- a further embodiment of the device according to the present invention comprises an inflatable body, for instance two membranes that are sealingly connected along their perimeter and a supply duct for supply of a fluid into the space between the membranes for inflating and deflating the sealing device.
- the luminal membrane is made of a stiffer material to keep the space between both membranes exceedingly small. In this way, the expansion of the device in the width direction can take place by inflation.
- the gripping element is formed by a supply duct which ends in an opening in the flexible sheet material for administration of substances through the supply duct into the recipient blood vessel.
- This device is particularly suitable for instance for performing a rescue blood perfusion during emergency coronary bypass grafting.
- the rescue blood perfusion pressure should not exceed normal intra-coronary pressure in order to avoid inadvertent expulsion of the device.
- the perfusion seal may be used in a non-rescue situation when contractile function of the distal myocardium is marginal.
- the material is non biodegradable which allows for a large choice of suitable, non biodegradable materials such as for instance a polyurethane material , or other materials from which commercially available balloon catheters are manufactured such as available from Medtronic, Minneapolis, USA; Research Medical Vascular, Research Medical, Inc. Midvale, Utah, USA.
- the seal according to the present invention was evaluated in a porcine carotid artery (internal diameter 3-5 mm) bypass graft model.
- the seal insertion time was about 20 seconds .
- the retrieval time was about 5 seconds .
- median occlusion time upon insertion or retrieval was about 90 seconds.
- Microsurgical suturing was performed without leakage of the seal and with unimpeded flow.
- no more than one third of the inner circumference of the recipient artery at the anastomosis showed absence of endothelial cells after two days. No medial necrosis was observed.
- intimal hyperplasia at the sutureline was not significantly different from conventionally sutured anastomoses.
- figure 1 shows an axial cross-sectional view of a recipient vessel comprising the sealing device according to the present invention
- figure 2 shows a plan view of the device according to figure 1
- figure 3 shows a transverse cross-sectional view of the vessel of figure 1
- figure 4 shows the functioning of the sealing device during suturing along the edge of the opening in the vessel wall
- figure 5 shows a schematic perspective view of the retrieval of the seal according to the present invention
- figure 6 shows a schematic side view of the insertion of the seal according to the invention via an introducer sheath
- figures 7a to 7c respectively show a top view, a sideview and a cross-sectional view along the line c-c in figure 7 of the seal according to the present invention
- figure 8 shows a transverse cross-sectional view of a sealing device according to the present invention, comprising a stopping plate or ring
- figures 9 , 9 and 9 respectively show a transverse cross- sectional view and an axial cross-sectional view of an inflatable embodiment of the seal according to
- Figures 12a-12c show an embodiment of a sealing device having a suture wire connected to its forwards part
- Figures 13a-13c show an embodiment wherein a suture wire extends along the lower side of the sealing device
- Figures l4a and l4b show a cross-sectional view and a plan view of a sealing device having a flexible sealing material connected along a closed contour of the upper part thereof,
- Figures 15 and 15b show a schematic perspective view and a plan view of an introducer for introducing a sealing device according to the present invention
- figures l6a-l6c show a schematic side view of a method of folding the sealing device according to the present invention along its width direction
- figures 17a-17c show the introduction of the folded sealing device of figures l6a-l6c into an arteriotomy
- figures 18a and 18b show an introducer comprising a gripper head in its engaging and in its retracted position, respectively
- figure 19 shows an embodiment wherein the engagement means on the sealing device comprise an eye, the gripper head of the introducer comprising a retractable hook
- figure 20 shows an embodiment wherein the engagement means on the sealing device comprise a bulbous end part, the gripper head of the introducer comprising flexible tongues.
- Figure 1 shows the medical device, or temporary luminal arteriotomy seal 1 according to the present invention, which is comprised of a flexible sheet material 2 having a gripping element 3 ("shark fin") on its outer surface.
- the seal 1 is introduced into a recipient vessel 6 through an opening 4 (arteriotomy) in the vessel wall 5-
- the seal 1 provides a leakage tight occlusion of the opening 4, allowing attachment of the donor vessel 7 around the edges 4' of the opening 4 with a heel 8 and toe 9 as indicated.
- a linear incision in the vessel wall will due to the tension in the elastic wall open into an elliptical opening 4.
- the sheet material of the seal 1 is sufficiently flexible such that its width dimensions, which are indicated as W in figure 3.
- the blood pressure will sealingly engage of the flexible sheet material 2 with the inside of the wall of the vessel in the vicinity of the opening 4.
- the transmural pressure in the artery will keep the extremely thin seal skin neatly apposed to the inner arterial wall, thereby sealing the arteriotomy, even in the case of (atherosclerotic) luminal wall surface irregularities.
- the cross-sectional area of the vessel will slightly increase due to expansion of the vessel after making the incision, such that the introduction of the thin seal does not impede the blood flow through the vessel .
- the flexible sheet material 2 will flex and give way when a needle 11 is stuck from inside to outside through the edge 4' of the walls of the vessel near the opening 4 while still maintaining a liquid tight barrier preventing blood from exiting from the vessel through opening 4.
- the seal 1 is removed from the vessel when a suture or sutures 12 around the perimeter of the opening 4 has been completed, but not tightened.
- the seal 1 is pulled out of the vessel by means of shark fin 3 grasped by a forceps through the loose loops of the suture 12, which thereafter is tightened to secure the bypass graft 7 to the recipient vessel 6.
- a sleeve 14 may be used around the seal 1, for easy insertion (and retrieval) .
- the seal 1 may be introduced into the vessel 6 by means of a hollow sheath 15, in a manner which is well-known in itself, and may be positioned and withdrawn by means of a thread 13.
- Figure 7a shows a preferred embodiment of the intravascular seal according to the present invention having along its longitudinal axis 16 length dimension, L, and a dimension in the width direction, W, along the transverse centre line 17.
- L length dimension
- W width direction
- a ridge may be provided for manipulation purposes.
- the gripping element 3 is placed at an angle ⁇ directed towards the toe of about 60 degrees with respect to the outer surface of the sheet material 2.
- the height of the gripping device 3 is about 1 mm.
- the gripping element 3 is positioned eccentrically towards the toe of the anastomosis with its back edge 10 at a distance of about 2-4 mm from the edge 20 of the sheet material 1.
- a ridge 3' is provided for manipulation (rotation) of the seal 1 inside a vessel.
- the thickness t of the sheet material is about 0.2 mm and the sheet material comprises a predisposed radius of curvature p.
- the flexible sheet material 1 By providing a preformed curvature, the flexible sheet material 1 will easily fold in the width direction W which allows for easy insertion and retrieval through an opening in the vessel wall. On the other hand, the flexible sheet material has a natural tendency to unfold and appose the vessel wall adjacent to the opening 4.
- Figure 8 shows a round or oval sealing device 1 particularly suitable for use in the proximal anastomosis.
- the flexible sheet material 2 comprises a long, flexible stem 3' (umbilical cord) which is provided with a stopping plate 3"> De stopping plate 3" prevents the sealing device from inadvertently entering into the blood vessel.
- FIG. 9 shows an inflatable seal 19 according to a second embodiment of the present invention in its partly deflated state.
- the inflatable seal 19 comprises an inflatable element 26 having two membranes 22, 23. which are sealed along their perimeter 25.
- the membranes 22,23 are connected to a supply duct 24 by which a fluid, for instance saline, can be introduced between the membranes 22,23.
- a fluid for instance saline
- the inflatable element 26 of the seal 19 assumes its inflated position as shown in figure 9b.
- the membrane 22 is relatively compliant and apposes the wall 5>
- Luminal membrane 23 is relatively stiff. In the inflate state, the distance between membrane 22 and membrane 23 is minimal to create a minimal cross-sectional area (obstruction to flow) .
- FIG. 9c shows an axial cross-sectional view of the device 19 of figures 9a and 9b.
- the inflatable seal adjusts to the radius of curvature of the artery and seals the arteriotomy.
- its cannula and balloon skin material are non-thrombogenic (possibly heparin or other anti-coagulation compound coated) , atraumatic and possibly hydrophyllic (c.f. glide wire).
- the balloon skin 22 is compliant, such that the suture needle can follow its regular course from inside to outside without producing a leak. The balloon skin gives way to the needle if the needle point is not positioned perpendicularly to the inflatable seal's skin.
- the minimal endothelial injury causes no mural thrombus formation.
- the minimal intimal hyperplasia response is similar to healing after conventional suturing.
- the lumen of the inflatable seal 1 is minimal to reduce the arterial lumen least.
- the seal 19 has a preformed shape which fits the size of the artery. In the deflated state, the seal takes the shape depicted in figure 9a.
- the luminal side of the seal is made of a balloon skin which has the property that it takes on the depicted shape. The curling should be as tight as possible to obtain the lowest profile in cross-section.
- the seal is inflated by saline. The inflation pressure is monitored. Inflation pressure is determined empirically. Inflating the seal 19 will de-curl the seal. A further increase in inflation pressure will stretch it. Little inflation pressure suffices to keep the seal in its proper shape and position.
- the seal By decreasing the pressure, the seal takes on its more deflated, curled shape and becomes less stiff and may follow more the possibly irregular inner surface of the atherosclerotic artery. With very little inflation pressure it will probably seal perfectly due to the transmural pressure in the artery, once it has been positioned properly.
- Figure 9d shows an inflatable seal 19 wherein the membrane 22 extends upwardly along the supply duct 24, to form a so-called double lumen cannula having two ducts 24, 24'.
- the inflatable element 26 of the seal 19 can be inflated by means of duct 24 ' .
- blood perfusion can be carried out or drugs can be delivered to the vessel.
- the double lumen cannula 24, 24' itself is also used as a cord to insert, manipulate and retrieve the seal.
- the inflatable seal may be positioned in either two ways: (1) through the arteriotomy, or (2) via an introducer sheath that has been positioned in the recipient artery.
- the second method is similar to inserting a catheter into an artery via an introducer.
- the introducer with needle is inserted into the lumen of the recipient artery.
- the needle is withdrawn and the seal is inserted in deflated and low profile state like a balloon catheter into the lumen.
- the introducer is removed over the supply cannula of the seal .
- the supply cannula of the seal has two and possibly four functions: (1) a cord to insert, manipulate and retrieve the seal; (2) inflation/deflation channel of the seal; (3) channel for local drug delivery; and (4) rescue blood perfusion.
- the seal can function as local drug delivery device.
- local heparin delivery reduces the risk of clot formation and inhibits local intimal hyperplasia as vessel wall repair response to vascular surgery injury.
- the local delivery of heparin may reduce or even abolish the need for anti-coagulation during anastomosis suturing. Obviating the need for systemic anti-platelet therapy and anticoagulation will contribute to reducing bleeding problems .
- Figure 10 shows an embodiment particularly suitable for the proximal anastomosis on the aorta, in which the sealing device 19 comprises a dough-nut-shaped inflatable element 26.
- a non-inflatable sealing device 26' for use in rescue arterial perfusion is shown.
- the flexible sheet material 32 comprises an opening 27 which is in fluid communication with a supply cannula or duct 31 for blood supply.
- the supply cannula 31 can be fed either directly from the arterial tree or via a pump.
- the supply cannula of the seal has three functions: (1) a cord to insert, manipulate and retrieve the seal; (2) channel for blood perfusion; (3) channel for delivery of drugs.
- the sheet material of the seal need not have a preformed curvature in the width direction, when the flexible sheet material is sufficiently flexible to conform to the curvature of the wall of the vessel.
- a preformed curvature in the width direction is preferred.
- FIGs 12a to 12c show a construction by which introduction of the temporary arteriotomy seal 40 into the arteriotomy 4l of an artery 42 is facilitated.
- a suture wire 43 is connected to the forward part 44 of the seal 40.
- a needle 46 is connected to the end of suture wire 43-
- the seal 40 is drawn into the arteriotomy 4l where it unfolds.
- a proper positioning of the seal 40 in the mid line is facilitated.
- complete ejection of the seal 40 out of the arteriotomy 4l can be prevented by tying a knot 47 in the suture wire 43 close to its exit point as shown in figure 12c.
- FIGS 13a-13c show a construction wherein the suture wire 48 extends along the lower side 49 of a seal 0 from the forward part 51 to a rearward part 52.
- the suture wire 48 is connected to the seal 50 by means of a suitable adhesive.
- the wire 48 penetrates the sheet material of the seal and extends towards a blocking and gripping device 53 which is attached to the end of the rearward part 55 of the suture wire 48.
- the blocking and gripping device 53 is not drawn to scale but will generally have a larger diameter than the arteriotomy 45 for preventing "upstream" dislodgement of the seal into the artery in case of retrograde blood flow.
- This embodiment allows the seal to be tightly rolled-up so that it can be placed inside a jacket which has a tapering form, more or less like "an umbrella case".
- the jacket with the seal may be placed within the vessel by means of the suture wire 48 without the use of a separate introducer.
- the jacket may be withdrawn from the vessel maintaining the tension on the suture wire and avoiding the seal to be pulled back.
- the seal should easily slide from its jacket, which can be achieved by using the same material for the jacket and the seal preferably comprising a liquid layer therebetween. Furthermore the seal does not adhere to itself in the rolled-up position.
- Figures l4a and l4b show an embodiment wherein a flexible and deformable material 56 is placed on the upper side 57 of the seal around a closed contour.
- the flexible and deformable material 56 is for instance made of hydrogel and improves sealing against an irregular surface of the wall 58 of the artery which may have irregularities due to arteriosclerosis .
- Figures 15a and 15b show an embodiment of an introducer 60 for introducing a rolled-up sealing device into the arteriotomy.
- the introducer 60 comprises a handle 61 and shaft 62 at the end of which a cylindrical sleeve 63 is connected.
- the sleeve 63 comprises an extension 64 comparable to a shoe horn which can be locked into the arteriotomy upon introducing the rolled up sealing element.
- the sealing element will be placed in a rolled-up position inside the sleeve 63.
- Figures l6a-l6c show three subsequent steps of placing a flexible sealing device 70 according to the present invention inside the tube of an introducer by grabbing the gripping element 72 and pulling the sealing device 70 upwardly inside the tube 71 by exerting an upward force in the direction of the arrow F on the gripping element 72. By this operation the sealing element 70 is folded along its width direction W.
- Figures 17a-17c show the introduction of the sealing device 70 into a vessel or artery 73 by placing the end part of the tube 71 into the opening or arteriotomy 74 and by lowering the gripping element 72.
- the sealing device 70 unfolds to assume its extended length dimension within the vessel 73 such that the arteriotomy 74 is sealed and the tube 71 can be removed.
- the introducer pen forms the following functions:
- the present method and introducer device allow an almost perpendicular approach of the introducer to the arteriotomy. Secondly, because the introducer is able to grasp the gripping element 7 repeatedly, it permits the sealing device to be relocated by the introducer once it has entered into the vessel 73 •
- the above properties render the introducer and the method of application of the sealing device according to figures 17a-17c particularly suitable to function in a closed chest environment.
- the introducer tube as shown in figures l6a-l6c and 17a-17c allows the sealing device 70 to be introduced single handedly. Furthermore, the arteriotomy required to insert the sealing device 70 can remain small.
- the present embodiment allows adaptation of the tube 71 to an endoscopic instrument wherein different additional instruments may be comprised in the tube such as an arteriotomy knife, light carrying fibres for elumination purposes, endoscopic fibre bundles for increased vision, flush and suction channels and the like.
- Figure 18a shows an introducer having a tube 71 and displaceable therein a gripping device 75-
- the gripping device comprises a gripper head 7 having two flexible clamping elements defining a slit therebetween, in which slit the gripping element 72 of the sealing device 70 can be placed.
- the upper end of the introducer comprises a pull rod 77 for retracting the gripper head 76 within the tube 71 •
- the flexible clamping elements of the gripper head 76 are pressed together when the gripper head is retracted within the tube, such that the gripping element 72 of the sealing device 70 is clamped therebetween.
- Retraction of the gripper head 76 inside the tube 71 causes the sealing device 70 to be folded along its width direction W. Thereafter it can be introduced into the arteriotomy in the manner as shown in figures 17a-17c.
- Figure 19 shows an embodiment wherein the gripper head of the introducer comprises a retractable hook 78- The hook can engage with an eye 80 on the gripping element 72 of the sealing device 70.
- the introducer comprises two flexible tongues 79 which can engage around a bulbous protrusion 8l at the end of the gripping element 72 of the sealing device 70.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69824854T DE69824854T2 (en) | 1997-07-31 | 1998-07-29 | TEMPORARY DEVICE SEALING BLOOD VESSELS IN ANASTOMOSIS |
US09/463,746 US6395015B1 (en) | 1997-07-31 | 1998-07-29 | Temporary vascular seal for anastomosis |
EP98937861A EP0999790B1 (en) | 1997-07-31 | 1998-07-29 | Temporary vascular seal for anastomosis |
AU86504/98A AU8650498A (en) | 1997-07-31 | 1998-07-29 | Temporary vascular seal for anastomosis |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97202393.1 | 1997-07-31 | ||
EP97202393A EP0894475A1 (en) | 1997-07-31 | 1997-07-31 | Temporary vascular seal for anastomosis |
EP98200847.6 | 1998-03-18 | ||
EP98200847A EP0895753A1 (en) | 1997-07-31 | 1998-03-18 | Temporary vascular seal for anastomosis |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999008603A1 true WO1999008603A1 (en) | 1999-02-25 |
WO1999008603A8 WO1999008603A8 (en) | 1999-04-29 |
Family
ID=26146752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1998/000430 WO1999008603A1 (en) | 1997-07-31 | 1998-07-29 | Temporary vascular seal for anastomosis |
Country Status (6)
Country | Link |
---|---|
US (1) | US6395015B1 (en) |
EP (2) | EP0895753A1 (en) |
AR (1) | AR011487A1 (en) |
AU (1) | AU8650498A (en) |
DE (1) | DE69824854T2 (en) |
WO (1) | WO1999008603A1 (en) |
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- 1998-07-29 EP EP98937861A patent/EP0999790B1/en not_active Expired - Lifetime
- 1998-07-29 AU AU86504/98A patent/AU8650498A/en not_active Abandoned
- 1998-07-29 DE DE69824854T patent/DE69824854T2/en not_active Expired - Lifetime
- 1998-07-31 AR ARP980103808A patent/AR011487A1/en active IP Right Grant
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US6458140B2 (en) | 1999-07-28 | 2002-10-01 | Vasconnect, Inc. | Devices and methods for interconnecting vessels |
US6302892B1 (en) | 1999-08-04 | 2001-10-16 | Percardia, Inc. | Blood flow conduit delivery system and method of use |
US6482214B1 (en) | 2000-04-27 | 2002-11-19 | Medtronic, Inc. | Intravascular seal with mesh reinforcement and method for using same |
US6620177B2 (en) | 2001-02-15 | 2003-09-16 | Novare Surgical Systems, Inc. | Anastomosis occlusion device |
US6953464B2 (en) | 2001-02-21 | 2005-10-11 | Novare Surgical Systems, Inc. | Anastomosis occlusion device |
US7537599B2 (en) | 2001-02-21 | 2009-05-26 | Novare Surgical Systems, Inc. | Anastomosis occlusion device |
US8080023B2 (en) | 2003-12-12 | 2011-12-20 | Vitalitec International, Inc. | Device and method for performing multiple anastomoses |
US10987106B2 (en) | 2007-08-02 | 2021-04-27 | Tva Medical, Inc. | Implantable flow connector |
US10434293B2 (en) | 2012-04-15 | 2019-10-08 | Tva Medical, Inc. | Implantable flow connector |
US10632293B2 (en) | 2012-04-15 | 2020-04-28 | Tva Medical, Inc. | Delivery system for implantable flow connector |
US11541213B2 (en) | 2012-04-15 | 2023-01-03 | Tva Medical, Inc. | Delivery system for implantable flow connector |
US11666737B2 (en) | 2012-04-15 | 2023-06-06 | Tva Medical, Inc. | Implantable flow connector |
Also Published As
Publication number | Publication date |
---|---|
AU8650498A (en) | 1999-03-08 |
DE69824854T2 (en) | 2005-08-18 |
WO1999008603A8 (en) | 1999-04-29 |
DE69824854D1 (en) | 2004-08-05 |
EP0999790A1 (en) | 2000-05-17 |
US6395015B1 (en) | 2002-05-28 |
EP0895753A1 (en) | 1999-02-10 |
AR011487A1 (en) | 2000-08-16 |
EP0999790B1 (en) | 2004-06-30 |
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