JP-7856431-B2 - Confirmation of intravenous catheter placement

Inventors

• イーピン マー
• エス．レイ アイザックソン
• ウェストン エフ．ハーディング
• ジョセフ スパタロ
• フイ トラン
• ジョナサン カール バークホルツ
• モハンクマル ナテーサン
• キエット ジン チェン
• キャスリン ウィリーバイロ

Assignees

• ベクトン・ディキンソン・アンド・カンパニー

Dates

Publication Date

20260511

Application Date

20200116

Priority Date

20200114

Claims (8)

1. A catheter adapter including a distal end and a proximal end, A catheter comprising a distal end, a proximal end, a catheter lumen extending through the distal end and the proximal end of the catheter , and an inner surface forming the catheter lumen, wherein the catheter extends distally from the distal end of a catheter adapter, and the distal end of the catheter includes a hole, An introduction needle that extends through a catheter, including an introduction needle with a sharp distal tip, A gap is provided within the lumen of the catheter between the outer surface of the introduction needle and the inner surface of the catheter, the gap including a gap that is in fluid communication with the hole so that blood can flow from the hole to the gap as the hole is inserted into the vein. The introduction needle includes a distal end, a proximal end, an introduction needle lumen extending through the distal end and the proximal end of the introduction needle, and an inner surface forming the introduction needle lumen, and further includes a sensor embedded in the inner surface of the introduction needle at the distal end of the introduction needle, the sensor being configured to detect that the distal end of the introduction needle is in a vein. The aforementioned sensor is a catheter system including a bioimpedance sensor, a capacitance sensor, or an infrared sensor.
2. The catheter system according to claim 1, wherein the gap is annular.
3. The catheter system according to claim 1, wherein the introduction needle includes a groove, the distal end of the groove is close to a hole, and the gap is located within the groove.
4. The catheter system according to claim 3, wherein the hole is a first hole, the groove is a first groove, the distal end of the catheter includes a second hole, the second hole is proximal to the first hole, and the distal end of the second groove is close to the second hole.
5. The catheter system according to claim 1, further comprising a plurality of other sensors, wherein the sensor and the plurality of other sensors include bioimpedance sensors, and the sensor and the plurality of other sensors are aligned with the inclination of the introduction needle.
6. The catheter system according to claim 1, further comprising a sensor embedded in the outer surface of the catheter, adjacent to the gap at the distal end of the catheter, wherein the sensor is configured to detect that the distal end of the catheter is in a vein.
7. The catheter system according to claim 6, wherein the sensor includes a bioimpedance sensor, a pressure sensor, a capacitance sensor, or an infrared sensor.
8. The catheter system according to claim 1, wherein the introduction needle includes a distal end, a proximal end, an introduction needle lumen extending through the distal end and proximal end of the introduction needle, and an inner surface forming the introduction needle lumen, and further includes a bioimpedance sensor, the bioimpedance sensor including a first electrode and a second electrode, the first electrode being embedded in the inner surface of the introduction needle at the distal end of the introduction needle, or in the outer surface of the catheter at the distal end of the catheter within the gap, and the second electrode being fixed to the patient's skin.

Description

This disclosure generally relates to vascular access devices and related systems and methods. Catheters are commonly used in various infusion therapies. For example, catheters can be used to infuse fluids such as normal saline solution, various medications, and parenteral nutrition formulas into patients. Catheters can also be used to draw blood from patients. A common type of catheter is the over-the-needle peripheral intravenous catheter ("PIVC"). As the name suggests, the over-the-needle PIVC is fitted over an introducer needle with a sharp distal tip. The PIVC and introducer needle can be assembled so that the distal tip of the introducer needle is angled outward from the patient's skin and extends beyond the distal tip of the PIVC. The PIVC and introducer needle are generally inserted through the skin into the patient's vein at a shallow angle. To ensure the correct placement of the intravascular insertion needle and/or PIVC, clinicians typically observe a blood "flashback." More specifically, in some cases, the insertion needle may include a notch. As the sharp distal tip of the insertion needle is positioned within the patient's vascular structure, blood flows proximally through the lumen of the needle and exits through the notch. Next, blood can move proximal to the inner surface of the PIVC, which may be transparent, between the outer surface of the introduction needle and the inner surface of the PIVC. Therefore, the clinician can visualize the blood, thereby confirming the placement of the introduction needle within the vascular structure. Once the needle placement is confirmed, the clinician temporarily obstructs the flow in the vein, removes the introduction needle, and leaves the PIVC in the same position for further blood collection and/or fluid injection. The subject matter claimed herein is not limited to embodiments that resolve any disadvantages or embodiments that operate only in environments such as those described above. Rather, this background art is provided only to illustrate an example of a technical area in which some of the devices described herein can be implemented. U.S. Patent Application No. 15/946,593U.S. Patent Application No. 15/286,261 This disclosure generally relates to vascular access devices and related systems and methods. In some embodiments, a catheter system may include a catheter adapter, which may include a distal end, a proximal end, and a catheter adapter lumen extending through the distal and proximal ends of the catheter. In some embodiments, a catheter system may include a catheter, which may include a distal end, a proximal end, a catheter lumen extending through the proximal ends of the catheter, and an inner surface forming the catheter lumen. In some embodiments, the catheter may extend distally from the distal end of the catheter adapter. In some embodiments, the catheter system may include an introduction needle that can extend from the catheter. In some embodiments, the introduction needle may include a sharp distal tip that can be positioned distal to the distal end of the catheter. In some embodiments, the distal end of the catheter may include a distal opening, through which the introduction needle can extend. In some embodiments, the distal end of the catheter adapter may include one or more holes. In some embodiments, the catheter system may include a gap located between the outer surface of the insertion needle and the inner surface of the catheter. In some embodiments, this gap may be located within the catheter lumen. In some embodiments, this gap may be fluid-communicated with the hole so that blood can flow through the hole into the gap as the hole is inserted into a vein. In some embodiments, all or part of the catheter may be transparent, and the gap may include a visualization channel through which blood flows, visible to the clinician. In some embodiments, the gap may be close to the hole. In some embodiments, the gap may be annular. In some embodiments, the guide needle may include one or more grooves. In some embodiments, the distal end of each groove may be close to an individual hole. In some embodiments, the gap may be located within the groove. In some embodiments, the holes may be arranged such that some holes are distal to others. In some embodiments, the guiding needle may include a distal end, a proximal end, a guiding needle lumen extending through the distal and proximal ends of the guiding needle, and an inner surface forming the guiding needle lumen. In some embodiments, the catheter system may include one or more sensors. In some embodiments, the sensor may be embedded in the inner surface of the guiding needle at its distal end. In addition, or alternatively, in some embodiments, the sensor may be embedded in the inner surface of the catheter adjacent to the gap at the distal end. In some embodiments, the sensor may be configured to detect whether the distal end of the insertion needle and/or the distal end of the cathet