Introducer assembly and introducer needle

Abstract

An introducer needle (104) and introducer assembly are disclosed. The introducer assembly (100) includes a syringe (102) and a needle (104) in fluid communication. The needle (104) includes a needle shaft and a needle hub, the needle hub including a port and a valve disposed within the port. The port is on a side of the needle hub proximal to the proximal end of the needle shaft. The valve is configured to form a fluid-tight seal around an elongated medical instrument, such as an access guidewire (106), when such an elongated medical instrument passes through the port and into the needle hub lumen of the needle hub. Such an access guidewire (106) can be pre-positioned within the introducer assembly just proximal to the needle tip of the needle. In this manner, the access guidewire (106) can be advanced into the vascular lumen immediately upon establishing a needle path therewith with the needle (104).

Description

[Technical field]

[0001] The present invention relates to medical devices, and more particularly to introducer needles and assemblies. [Background technology]

[0002] A guidewire is typically placed into a blood vessel with an introducer assembly prior to inserting a central venous catheter ("CVC") or the like over the guidewire into the vessel. The introducer assembly typically includes a needle connected to a syringe. When accessing a vessel with the needle, the needle must be removed from the syringe so that a guidewire can be inserted into the needle through the needle hub and then into the vessel. Removing the needle from the syringe as well as inserting the guidewire into the needle carries the risk of over-manipulating the needle and puncturing the back wall of the vessel, losing access to the vessel, or both. What is needed is an introducer assembly that does not require removing the needle from the syringe in order to insert a guidewire into the vessel.

[0003] Disclosed herein are introducer components, assemblies, and methods that address the foregoing. Summary of the Invention

[0004] Disclosed herein, in some embodiments, is an introducer assembly including a syringe and a needle fluidly connected to the syringe. The needle includes a needle shaft and a needle hub on a proximal portion of the needle shaft. The needle hub includes a port and a valve disposed within the port. The port is on a side of the needle hub proximal to a proximal end of the needle shaft. The valve is configured to form a fluid-tight seal around an elongated medical instrument when the medical instrument passes through the port and into the needle hub lumen of the needle hub.

[0005] In some embodiments, the introducer assembly further includes an access guidewire that is slidably disposed within the introducer assembly in the ready-to-deploy state of the introducer assembly through the port, through the needle hub lumen, through the proximal end of the needle shaft, and into the needle shaft lumen of the needle shaft such that a guidewire tip of the distal portion of the access guidewire is disposed just proximal to the needle tip of the distal portion of the needle shaft.

[0006] In some embodiments, the guidewire tip is a "J" shaped guidewire tip that is straight in the ready to deploy state of the introducer assembly and curved as the guidewire tip advances beyond the needle tip in the deployed state of the introducer assembly.

[0007] In some embodiments, the access guidewire includes a bare wire portion and a wound portion proximal to the bare wire portion, the bare wire portion extending distally through the valve in at least a ready-to-deploy state of the introducer assembly to form a fluid-tight seal.

[0008] In some embodiments, the access guidewire includes a proximal portion that extends proximally from the port in the ready-to-deploy state of the introducer assembly, The proximal portion of the access guidewire is disposed within a sterile barrier configured to maintain sterility of the access guidewire.

[0009] In some embodiments, the valve includes a split septum compressed within the port. In some embodiments, the needle hub further comprises a needle hub connector. The needle hub connector comprises a needle hub bore proximal to the port. A syringe tip of the syringe is disposed in the needle hub bore, thereby placing the needle in fluid communication with the syringe.

[0010] Also disclosed herein, in some embodiments, is an introducer needle including a needle shaft and a needle hub on a proximal portion of the needle shaft. The needle hub includes a port and a valve disposed within the port. The port is on a side of the needle hub proximal to a proximal end of the needle shaft. The valve is configured to form a fluid-tight seal around an elongated medical instrument when the medical instrument passes through the port and into the needle hub lumen of the needle hub.

[0011] In some embodiments, the valve includes a split septum compressed within the port. In some embodiments, the needle hub further comprises a needle hub connector comprising a needle hub bore proximal to the port configured to receive a syringe tip inserted therein to fluidly connect the needle to the syringe.

[0012] Also disclosed herein is a method of obtaining vascular access. The method, in some embodiments, includes the steps of obtaining an introducer assembly, establishing a needle path, and advancing an access guidewire. The obtaining an introducer assembly includes obtaining an introducer assembly. The introducer assembly includes a syringe, a needle fluidly coupled to the syringe, and an access guidewire slidably disposed within the introducer assembly. The needle includes a needle hub having a port on a side thereof. The port is proximal to a proximal end of a needle shaft disposed within the needle hub. The access guidewire passes through a valve disposed within the port, through a needle hub lumen of the needle hub, through a proximal end of the needle shaft, and into a needle shaft lumen of the needle shaft. The establishing a needle path includes establishing a needle path with the needle from an area of ​​the patient's skin to a vessel lumen. The advancing an access guidewire includes advancing the access guidewire into the vessel lumen to obtain vascular access.

[0013] In some embodiments, the method further includes an introducer assembly adjustment step, which includes adjusting the introducer assembly such that the introducer assembly is in a ready-to-deploy state in which a guidewire tip of a distal portion of the access guidewire is positioned immediately proximal to a needle tip of a distal portion of the needle shaft for performing an access guidewire advancement step immediately following establishment of the needle path in the needle path establishment step.

[0014] In some embodiments, the access guidewire advancing step can cause the guidewire tip of the access guidewire to transition from a straight shape within the access guidewire passageway to a curved shape within the vessel lumen.

[0015] In some embodiments, the method further includes a plunger withdrawal step that involves withdrawing the plunger from the barrel of the syringe and creating a slight vacuum prior to reaching the vessel lumen, whereby blood flows back into at least the syringe tip to confirm establishment of the needle path in the needle path establishment step.

[0016] In some embodiments, the method further includes a blood aspirating step, which includes aspirating blood with a syringe to confirm establishment of a needle path in the needle path establishing step. A valve disposed within the port is configured to form a fluid-tight seal around the bare portion of the access guidewire to maintain a vacuum during the blood aspirating step.

[0017] In some embodiments, the method further comprises a needle withdrawal step, which comprises withdrawing the needle from the patient while leaving the access guidewire within the vessel lumen.

[0018] In some embodiments, the needle withdrawal step includes holding the guidewire in place at or near the area of ​​skin containing the needle path while withdrawing the needle over a proximal portion of the access guidewire.

[0019] In some embodiments, the method further comprises a syringe and needle separation step, which comprises separating the needle from the syringe prior to the needle withdrawal step.

[0020] In some embodiments, the method further includes an air-bleeding step, which includes pushing the access guidewire closer to the port against the valve to expel air toward the port during the needle retraction step. The air-bleeding step of expelling air toward the port eliminates the need for a separation step of separating the needle from the syringe.

[0021] In some embodiments, the valve includes a split septum compressed within the port. These and other features of the concepts provided herein will become more apparent to those of ordinary skill in the art in view of the accompanying drawings and following description, which disclose in more detail certain embodiments of such concepts. [Brief description of the drawings]

[0022] [Figure 1] 1 shows a perspective view of an introducer assembly according to some embodiments. [Diagram 2] 1 illustrates a side view of an introducer assembly according to some embodiments. [Diagram 3] 1 illustrates a top view of an introducer assembly according to some embodiments. [Figure 4] 1 illustrates an exploded view of an introducer assembly according to some embodiments. [Diagram 5] 1 illustrates a top view of an introducer needle according to some embodiments. [Figure 6] 1 illustrates a side view of an introducer needle according to some embodiments. [Figure 7] 1 illustrates a longitudinal cross section of an introducer needle according to some embodiments. [Figure 8]1 illustrates a longitudinal cross section of an introducer needle including an access guidewire disposed therein, according to some embodiments. [Figure 9] 11 illustrates a portion of a method of using an introducer assembly according to some embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Before disclosing some specific embodiments in more detail, it should be understood that the specific embodiments disclosed herein do not limit the scope of the concepts provided herein. It should also be understood that the specific embodiments disclosed herein may have features that can be easily separated from the specific embodiment and, optionally, combined with or substituted for features of any of the other embodiments disclosed herein.

[0024] With regard to the terms used herein, it should also be understood that these terms are intended to describe some particular embodiments, and that these terms do not limit the scope of the concepts provided herein. Ordinal numbers (e.g., first, second, third, etc.) are generally used to distinguish or identify different features or steps within a group of features or steps, and do not provide serial or numerical limitations. For example, "first," "second," and "third" features or steps do not necessarily have to appear in that order, and a particular embodiment including such features or steps is not necessarily limited to three features or steps. In addition, any of the aforementioned features or steps may further include one or more features or steps, unless otherwise indicated. Designations such as "left," "right," "up," "down," "front," "rear," etc. are for convenience and do not imply, for example, a particular fixed position, direction, orientation, etc. Instead, such designations are used to reflect, for example, a relative position, orientation, or direction. The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0025] For example, with reference to the "proximal," "proximal portion," or "proximal end portion" of a catheter, this includes the portion of the catheter that is intended to be near the clinician when the catheter is used with a patient. Similarly, for example, the "proximal length" of a catheter includes the length of the catheter that is intended to be near the clinician when the catheter is used with a patient. For example, the "proximal end" of a catheter includes the end of the catheter that is intended to be near the clinician when the catheter is used with a patient. The proximal portion, proximal end portion, or proximal length of a catheter can include the proximal end of the catheter. However, the proximal portion, proximal end portion, or proximal length of a catheter need not include the proximal end of the catheter. That is, unless the context suggests otherwise, the proximal portion, proximal end portion, or proximal length of a catheter is not the terminal portion or terminal length of the catheter.

[0026] For example, with reference to the "distal," "distal portion," or "distal end portion" of a catheter, this includes the portion of the catheter that is intended to be near or within the patient when the catheter is used with the patient. Similarly, for example, the "distal length" of a catheter includes the length of the catheter that is intended to be near or within the patient when the catheter is used with the patient. For example, the "distal end" of a catheter includes the end of the catheter that is intended to be near or within the patient when the catheter is used with the patient. The distal portion, distal end portion, or distal length of a catheter can include the distal end of the catheter. However, the distal portion, distal end portion, or distal length of a catheter need not include the distal end of the catheter. That is, unless the context suggests otherwise, the distal portion, distal end portion, or distal length of a catheter is not the terminal portion or terminal length of the catheter.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. As discussed above, a guidewire is typically placed into a blood vessel with an introducer assembly prior to inserting a CVC or the like over the guidewire into the vessel. The introducer assembly typically includes a needle connected to a syringe. When using the needle to access a vessel, the needle must be removed from the syringe so that the guidewire can be inserted through the needle hub into the needle and then into the vessel. Not only removing the needle from the syringe, but also inserting the guidewire into the needle, carries the risk of puncturing the back wall of the vessel or losing access to the vessel due to overhandling the needle, or both. What is needed is an introducer assembly that does not require the needle to be removed from the syringe in order to insert the guidewire into the vessel.

[0028] Disclosed herein are introducer components, assemblies, and methods that do not require the needle to be removed from the syringe to insert the guidewire into the vessel as in typical introducer assemblies. Such introducer components, assemblies, and methods are advantageous in that there is no risk of puncturing the back wall of the vessel or losing access to the vessel due to over-handling the needle. In one embodiment, an introducer assembly is disclosed that includes a fluid-communicated syringe and needle. The needle includes a needle shaft and a needle hub on a proximal portion of the needle shaft. The needle hub includes a port and a valve disposed within the port. The port is on a side of the needle hub proximal to the proximal end of the needle shaft. The valve is configured to form a fluid-tight seal around an elongated medical instrument, such as an access guidewire, when such an elongated medical instrument passes through the port and into the needle hub lumen of the needle hub. When the medical instrument is an access guidewire, the guidewire is disposed within the introducer assembly just proximal to the needle tip of the needle. In this manner, the access guidewire can be advanced into the vessel lumen immediately upon establishing a needle path with the needle into the vessel lumen. In another embodiment, a method of obtaining vascular access using the aforementioned introducer assembly is disclosed. Again, these and other features will become more apparent upon consideration of the accompanying drawings and the following description, in which certain embodiments are described in more detail. Introducer Assembly 1-4 show various views of an introducer assembly 100 according to some embodiments.

[0029] As shown, introducer assembly 100 includes syringe 102 and needle 104 that is in fluid communication with syringe 102 at least in the ready-to-deploy state of introducer assembly 100. Additionally, introducer assembly 100 may include an access guidewire 106 that is slidably disposed within introducer assembly 100 in the ready-to-deploy state of introducer assembly 100. Indeed, as described in more detail below, access guidewire 106 passes through port 144, through needle hub lumen 148, through the proximal end of needle shaft 136, and into needle shaft lumen 142 of needle shaft 136 such that guidewire tip 154 ​​is located just proximal to needle tip 138 in the ready-to-deploy state of introducer assembly 100. In this manner, access guidewire 106 may be advanced into the vessel lumen immediately upon establishing a needle pathway therein with needle 104.

[0030] Syringe 102 includes a syringe hub 108, a barrel 110, and a plunger 112 that is disposed within barrel 110 in at least the ready-to-deploy state of introducer assembly 100.

[0031] The syringe hub 108 includes a syringe tip 114 that extends from a distal portion (e.g., the distal end) of the barrel 110. Additionally, the syringe hub 108 can include a threaded collar 116 that extends from the distal portion (e.g., the distal end) of the barrel 110 and around the syringe tip 114.

[0032] The syringe tip 114 is configured for insertion into a needle hub bore 152 of the needle hub 140, described below, to fluidly connect the syringe 102 to the needle 104. In practice, the syringe tip 114 may have a luer taper (e.g., a 6% taper) configured for insertion into the needle hub bore 152, which is complementarily configured as described below.

[0033] The threaded collar 116 includes internal threads 118 that are configured to threadably mate with a needle hub flange of the needle hub 140, described below. In this case, the threaded collar 116 of the syringe hub 108 advantageously provides a so-called luer lock type connection with the needle hub flange of the needle hub 140, providing greater security against inadvertent disconnection than a luer slip type connection.

[0034] The barrel 110 includes a barrel wall 120, a barrel chamber 122 defined by the barrel wall 120, a barrel flange 124 extending outwardly from a proximal portion (e.g., a proximal end) of the barrel 110 or barrel wall 120 that is configured to actuate the syringe 102 in conjunction with a plunger flange 128, a plunger collar, etc., described below.

[0035] The barrel chamber 122 is configured to receive the plunger 112 inserted therein. In effect, the barrel chamber 122 extends from the distal end of the barrel 110, which is the closed end of the barrel 110 (excluding the syringe tip 114), to the proximal end of the barrel 110, which is the open end of the barrel 110 into which the plunger 112 can be inserted.

[0036] The plunger 112 includes an integral plunger shaft 126, a piston 127 fitted onto a distal portion (e.g., the distal end) of the plunger shaft 126, a plunger flange 128 extending outward from a proximal portion (e.g., the proximal end) of the plunger 112 configured to actuate the syringe 102 in conjunction with the barrel flange 124, barrel collar, etc.

[0037] The plunger shaft 126 includes orthogonal struts 130 that meet along the longitudinal edges at the central axis of the plunger shaft 126 . The piston 127 may be a one-piece resilient piston and includes one or more rings configured to respectively form one or more seals with the barrel wall 120. The one or more rings include at least a forward ring 132 configured to form a seal with the barrel wall 120. The one or more rings may also include a rearward ring 134, as shown in FIG. 4. Similar to the forward ring 132, the rearward ring 134 is configured to form a seal with the barrel wall 120. In fact, the rearward ring 134, if present, provides a backup seal with the barrel wall 120. The forward ring 132 and the rearward ring 134 together ensure that the seal between the piston 127 and the barrel wall 120 (e.g., the seal provided by the forward ring 132, the rearward ring 134, or both the forward ring 132 and the rearward ring 134) remains intact during actuation of the syringe 102, thereby allowing the syringe 102 to continue to aspirate liquid, such as blood, as the plunger 112 is withdrawn from the barrel 110.

[0038] The needle 104 includes a needle shaft 136 , a needle tip 138 at a distal portion of the needle shaft 136 , and a needle hub 140 on a proximal portion of the needle shaft 136 . The needle shaft 136 includes a needle shaft lumen 142 that extends from an opening at the needle tip 138 to the proximal end of the needle shaft 136 .

[0039] The needle hub 140 includes a port 144, a valve 146 disposed within the port 144, and a needle hub lumen 148 radially inward from the port 144. The port 144 is on a side of the needle hub 140 proximal to the proximal end of the needle shaft 136 such that the access guidewire 106 can pass through the port 144, through a portion of the needle hub lumen 148, and into the proximal end of the needle shaft 136. The valve 146 may be a septum or split septum disposed within the port 144 and is configured to form a fluid-tight seal around the access guidewire 106 when the access guidewire 106 passes through the port 144 and into the needle hub lumen 148 of the needle hub 140.

[0040] The needle hub 140 further includes a needle hub connector 150 that includes a needle hub hole 152 proximal to the port 144 and an optional needle hub flange around a proximal portion of the needle hub connector 150 .

[0041] The needle hub bore 152 is configured to receive the syringe tip 114 therein to fluidly connect the needle 104 to the syringe 102. In practice, the needle hub bore 152 can have a luer taper (e.g., a 6% taper) configured to receive the syringe tip 114 therein, with the syringe tip 114 being complementarily configured as described above.

[0042] Although not shown, the needle hub flange is configured to threadably mate with the internal threads 118 of the threaded collar 116 of the syringe hub 108. In this case, the needle hub flange advantageously provides a so-called luer lock type connection with the internal threads 118 of the threaded collar 116 of the syringe hub 108, providing increased security against inadvertent disconnection as compared to a luer slip type connection.

[0043] In this case, introducer assembly 100 may include an access guidewire 106 that is slidably disposed within introducer assembly 100 in the ready-to-deploy state of introducer assembly 100. Indeed, access guidewire 106 passes through port 144, through needle hub lumen 148, through the proximal end of needle shaft 136, and into needle shaft lumen 142 of needle shaft 136 such that guidewire tip 154 ​​is located just proximal to needle tip 138 in the ready-to-deploy state of introducer assembly 100. In this manner, access guidewire 106 may be advanced into the vessel lumen immediately upon establishing a needle pathway therein with needle 104. In particular, access guidewire 106 includes a proximal portion that extends proximally from port 144 in the ready-to-deploy state of introducer assembly 100. Although not shown, the proximal portion of the access guidewire 106 can be placed within a sterile barrier, such as an elongated bag or guidewire distribution device, which is configured to maintain the sterility of the access guidewire 106.

[0044] The access guidewire 106 may include a guidewire tip 154 ​​in the form of a "J" shaped guidewire tip configured to prevent puncturing the posterior wall of a blood vessel, which is straight in the ready-to-deploy state of the introducer assembly 100 and curved in the deployed state of the introducer assembly 100 as the guidewire tip 154 ​​advances beyond the needle tip 138.

[0045] The access guidewire 106 may further include a bare wire portion 156 and a wound portion 158 distal to the bare wire portion 156, proximal to the bare wire portion 156, or both. The bare wire portion 156 extends distally through the valve 146 in at least a ready-to-deploy state of the introducer assembly 100 to form a fluid-tight seal. Indeed, the bare wire portion 156 may extend further distally through the valve 146 in one or more deployed states of the introducer assembly 100 to maintain a fluid-tight seal even when a distal portion of the access guidewire 106 advances into the vessel lumen. Notably, the access guidewire 106 need not have a bare wire portion 156 and a wound portion 158. At least the aforementioned bare wire portion 156 may instead be a flat-wrapped or ground-wrapped portion of the access guidewire 106, with the flat-wrapped portion including windings of tape instead of round wire and the ground-wrapped portion including windings of round wire that have been ground to flatten the windings. method The method includes at least a method of obtaining vascular access, the method including one or more steps selected from the steps of obtaining an introducer assembly, adjusting an introducer assembly, establishing a needle path, withdrawing a plunger, aspirating blood, advancing an access guidewire, separating a syringe and needle, venting air, and withdrawing a needle.

[0046] The introducer assembly obtaining step includes obtaining an introducer assembly 100. As described above, introducer assembly 100 includes a syringe 102, a needle 104 in fluid communication with syringe 102, and an access guidewire 106 slidably disposed within introducer assembly 100. Needle 104 includes a needle hub 140 having a port 144 on a side of needle hub 140. Again, port 144 is proximal to a proximal end of a needle shaft 136 disposed within needle hub 140. At least in the ready-to-deploy state of introducer assembly 100, access guidewire 106 passes through a valve 146 disposed within port 144, through a needle hub lumen 148 of needle hub 140, through a proximal end of needle shaft 136, and into a needle shaft lumen 142 of needle shaft 136.

[0047] The adjust introducer assembly step includes adjusting introducer assembly 100 so that introducer assembly 100 is in a ready-to-deploy state if the obtain introducer assembly step has not yet been performed in which the guidewire tip 154 ​​of the distal portion of access guidewire 106 is immediately proximal to needle tip 138 of the distal portion of needle shaft 136 for performing the access guidewire advancement step immediately after establishing the needle path in the establish needle path step.

[0048] The needle pathway establishment step involves establishing a needle pathway with needle 104 from an area of ​​the patient's skin to a blood vessel lumen. The plunger withdrawal step involves withdrawing the plunger 112 from the barrel 110 of the syringe 102 to create a slight vacuum before reaching the blood vessel lumen in the needle path establishment step. The slight vacuum causes blood to flow back into at least the syringe tip 114, confirming the establishment of the needle path in the needle path establishment step.

[0049] The blood withdrawal step includes aspirating blood with the syringe 102 to confirm establishment of the needle path in the needle path establishment step. The valve 146 disposed within the port 144 is configured to form a fluid-tight seal around the bare portion 156 of the access guidewire 106 to maintain a vacuum during the blood withdrawal step.

[0050] The access guidewire advancement step involves advancing the access guidewire 106 into the vessel lumen to gain vascular access. The access guidewire advancement step allows the guidewire tip 154 ​​of the access guidewire 106 to transition from a straight shape within the access guidewire passageway to a curved shape within the vessel lumen.

[0051] The syringe and needle separation step includes a step of separating the needle 104 from the syringe 102 before the needle withdrawal step. However, if the air removal step is performed, it is not necessary to perform the syringe and needle separation step.

[0052] FIG. 9 illustrates a needle withdrawal step according to some embodiments. The needle withdrawal step involves withdrawing the needle 104 from the patient while leaving the access guidewire 106 within the vessel lumen. As shown, the needle withdrawal step involves holding the guidewire in place at or near the area of ​​the skin that includes the needle track while withdrawing the needle 104 over a proximal portion of the access guidewire 106.

[0053] The air purge step includes pushing the access guidewire 106 closer to the port 144 against the valve 146 to expel air towards the port during the needle retraction step. However, in some embodiments, the needle hub 140 includes a push button purge valve on another side of the needle hub 140 for the air purge step. By expelling the air into the port 144, a separation step of separating the needle 104 from the syringe 102 is not required. However, in some embodiments, both the syringe and needle separation step and the air purge step may be performed.

[0054] Some specific embodiments are disclosed herein, and although the specific embodiments are disclosed in some detail, the specific embodiments are not intended to limit the scope of the concept provided herein. Additional adaptations or modifications may be apparent to those skilled in the art, and the broader aspects also encompass these adaptations or modifications. Thus, one may deviate from the specific embodiments disclosed herein without departing from the scope of the concept provided herein.

Claims

Claim 1 An introducer assembly comprising: a syringe; and a needle in fluid communication with the syringe, the needle having a needle shaft; and a needle hub on a proximal portion of the needle shaft, the needle hub having a port provided directly on a side surface of the needle hub proximal to a proximal end of the needle shaft; and a valve disposed within the port and configured to form a liquid-tight seal around a long medical instrument when the long medical instrument enters a needle hub lumen of the needle hub through the port; and in a state where preparation for deployment of the introducer assembly is complete, further comprising an access guide wire slidably disposed within the introducer assembly, wherein a bare wire portion of the access guide wire extends distally through the valve such that the valve forms a liquid-tight seal around the bare wire portion of the access guide wire. An introducer assembly. Claim 2 The introducer assembly according to claim 1, wherein the access guide wire passes through the needle hub lumen and enters a needle shaft lumen of the needle shaft through a proximal end of the needle shaft such that a guide wire tip at a distal portion of the access guide wire is disposed immediately proximal to a needle tip at a distal portion of the needle shaft. Claim 3 The introducer assembly according to claim 2, wherein the guide wire tip is a "J"-shaped guide wire tip that is straight in a state where preparation for deployment of the introducer assembly is complete and curves when the guide wire tip advances beyond the needle tip in a deployed state of the introducer assembly. Claim 4 The introducer assembly according to claim 2 or 3, wherein the access guide wire includes a coiled portion proximal to the bare wire portion. Claim 5 The introducer assembly according to claim 2 or 3, wherein in a state where preparation for deployment of the introducer assembly is complete, the access guide wire includes a proximal portion extending proximally from the port, and the proximal portion of the access guide wire is disposed within a sterile barrier configured to maintain the sterility of the access guide wire. Claim 6 The introducer assembly according to any one of claims 1 to 3, wherein the valve includes a split partition compressed within the port. Claim 7 The introducer assembly according to any one of claims 1 to 3, wherein the needle hub further includes a needle hub connector having a needle hub hole proximal to the port, and a syringe tip of the syringe is disposed within the needle hub hole, thereby fluidly connecting the needle to the syringe.

8. An introducer needle comprising: a needle shaft; and a needle hub on a proximal portion of the needle shaft, the needle hub comprising: an opening provided directly on a side surface of the needle hub proximal to a proximal end of the needle shaft; and a valve disposed within the opening and configured to form a liquid-tight seal around a long medical instrument when the long medical instrument enters a needle hub lumen of the needle hub through the opening.

9. The introducer needle according to claim 8, wherein the valve includes a split partition compressed within the opening.

10. The introducer needle according to claim 8 or 9, wherein the needle hub further includes a needle hub connector having a needle hub hole proximal to the opening configured to receive a syringe tip inserted therein for fluidly connecting the introducer needle to a syringe.

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