US20040230164A1 - Curved tip for an insertion device - Google Patents
Curved tip for an insertion device Download PDFInfo
- Publication number
- US20040230164A1 US20040230164A1 US10/870,508 US87050804A US2004230164A1 US 20040230164 A1 US20040230164 A1 US 20040230164A1 US 87050804 A US87050804 A US 87050804A US 2004230164 A1 US2004230164 A1 US 2004230164A1
- Authority
- US
- United States
- Prior art keywords
- tip
- catheter
- profile
- tube
- insertion device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3286—Needle tip design, e.g. for improved penetration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
- A61M25/0631—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
Abstract
The present invention is directed to an insertion device, such as a catheter, including a tip having a hollow, substantially radial cross sectional configuration and a substantially parabolic longitudinal configuration with a circular tip curvature. The outer wall of the novel tip of the invention is completely curved, and contains no straight or angled outer walls within the length of the tip. The inner wall of the tip defines a substantially straight passageway through which a piercing device such as a needle may be inserted.
Description
- This application claims the benefit of U.S. Provisional Application No. 60/162,322, filed 28 Oct. 1999.
- The present invention relates to a tip for an insertion device. More specifically, the invention is directed to a curved tip for an insertion device such as a catheter. The surface profile of the novel tip of the invention is completely curved and includes a generally parabolic tubular surface profile with an insertion end that assumes a generally circular surface profile.
- A catheter is usually inserted through the skin of a patient by use of a sharp instrument, such as a needle. In many applications, the needle extends through the catheter wherein the point of the needle is adjacent to and extending slightly beyond the tip of the catheter. The needle pierces the skin of the patient to form an opening and the tip of the catheter follows the needle into the opening.
- Traditional catheter tips generally have straight edges and blunt insertion ends. The bluntness of traditional tips impedes the forward progress of the catheter into the opening in the skin. The force required to insert a blunt ended, straight edged catheter tip into the skin, which is also known as “transition force,” is generally sufficiently high to cause pain to the patient upon insertion.
- Attempts have been made to reduce the transition force required to insert a catheter into the skin of a patient. An example of such a catheter is shown in U.S. Pat. No. 4,588,398. In this patent, the tip of the catheter is angular, although still with straight edges and a blunt insertion end.
- It has been found that there is a need for a catheter tip that provides for the smooth and easy transition from a needle to a catheter as the device moves through the skin, to reduce the transition force during insertion of a catheter into a patient. The present invention satisfies this need.
- The present invention is directed to an insertion device, such as a catheter, including a tip having a hollow, substantially radial cross sectional configuration and a substantially parabolic longitudinal configuration with a longitudinally circular tip curvature. The outer wall of the novel tip of the invention is completely curved, and contains no straight or angled outer walls within the length of the tip. The inner wall of the tip defines a substantially straight passageway through which a piercing device such as a needle may be inserted.
- An embodiment of the present invention provides an insertion device that reduces the transition force required to insert the device into the skin of a patient.
- An embodiment of the present invention also provides a tip for an insertion device having an entirely curved outer wall in the longitudinal dimension.
- An embodiment of the invention further provides a catheter tip configuration which is thin enough to reduce the above-referenced transition force yet tough enough to eliminate splitting, tearing, or bunching of the catheter tubing material during insertion.
- An embodiment of the present invention provides a catheter tip with a smoothly convex outer wall.
- Other embodiments and advantages of the present invention shall become apparent to those skilled in the art upon a review of the following detailed description of the preferred embodiments and the accompanying drawings.
- FIG. 1 is a plan view of the insertion device according to the present invention positioned on a handle assembly with a needle extending through the insertion device;
- FIG. 2 is a side view cutaway of the generally parabolic tip of the invention, illustrating the completely curved outer wall of the tip and the longitudinally circularly curved insertion end of the tip.
- The preferred embodiment and best mode of the present invention will now be described in detail with reference being made to the drawings. The insertion device such as a catheter is indicated generally in the drawings by the
reference number 10. - Referring to FIGS. 1 and 2, the
catheter 10 includes a longitudinally extendingtube 12 having atip 14 and asecond end 16. Thesecond end 16 includes anattachment device 20 for attaching thecatheter 10 to, for example, a safetyneedle retraction assembly 22 or a luer-fitted coupling device (not shown). Thetube 12 includes aninterior surface 24 and an exterior surface 26. Theinterior surface 24 is adapted to receive aneedle 28 having apointed end 30. - The
catheter 10 is typically comprised of a plastic material. In a preferred embodiment, the plastic material is polyurethane, but it can also be TEFLON or any commonly known catheter material. It has been found that polyurethane has a relatively low coefficient of drag or friction, but the invention contemplates that other suitable materials may also be used. A low coefficient of friction aids the insertion of thecatheter 10 into the skin of a patient in a smooth and efficient manner. Thecatheter 10 and/or theneedle 28 can be treated with a lubricant. In the preferred embodiment, the lubricant is a conventional silicone-based compound. The lubricant reduces friction between thecatheter 10 and the skin of a patient during insertion. - Referring now to FIG. 2, in one preferred embodiment of a catheter having a tip formed according to the present invention, the
tip 14 is substantially generally parabolic in profile having a length “L” 36, over which length thecatheter tube 12 is smoothly and gradually reduced from its original wall thickness “t” 38 to intersect the surface of theneedle 28 atcatheter insertion end 40. Theinsertion end 40 is the end that is inserted, along with aneedle 28, through a patient's skin. Over the length “L”, the surface profile of thecatheter tip 14 generally follows a smooth, substantiallyparabolic curve 32 except at the point of insertion into a patient's skin, 40. At this point, the surface profile of the insertion end becomes substantially circular, and is described by an arc on a circle having a radius “r”, 42, as shown in FIG. 2. Length “L” may vary, and the generallyparabolic surface profile 32 oftip 14 substantially flattens at ornear point 34 where it assumes the generally cylindrical profile of the catheter tube with substantially parallel walls, with thickness “t” being relatively constant over the remaining length oftube 12 frompoint 34 to the second end 16 (as shown in FIG. 1). Thus, it will be seen that the substantially parabolic surface profile oftip 14 includes a narrowing of the profile to intersect the surface ofneedle 28 and includes a muting of the tip of theinsertion end 40, whichinsertion end 40 assumes the shape of a an arc on a circle of radius “r” 42, at some point before the parabola intersects the surface ofneedle 28. Theinsertion end 40 then follows this circular profile until it intersects theneedle surface 28, as illustrated in FIG. 2. It is this unique combination of the smoothly convex, generally parabolic narrowing-down of thecatheter tube 14, terminating in a slight muting of the parabolic curve by means of the circular surface contour at theinsertion end 40, that reduces the transition force while maintaining the physical integrity of the catheter material at theinsertion end 40. - It should be noted that the parabolic profile is not configured such that its apex would intersect the circumference of the circle; if it did, it could create a dimple in the smoothly convex overall outer wall configuration. Rather, the apex of the parabola lies on the surface of the needle just beyond the point at which the circle of radius “r” intersects the surface of needle (28). Point “p” (46) defines a smooth, dimple-free transition between the parabolic and circular profiles of the
tip 14 of the invention. Thus, the convex, parabolic shape is analogous to a comet tail, rolling over and out from the ball of the comet. - It is to be emphasized that the geometric characteristics described above are key in providing physical and operational integrity of the tip (i.e., prevent splitting and bunching and other side effects), and to minimize the transition force. The radius “r” is determined as an optimization between material strength and catheter penetration force. If “r” is too large the bulk profile of the tip makes penetration into the skin and vein high and not acceptable. If “r” is too small the material integrity is such that the tip can buckle going into the skin and vein and thus requires a high entry force. If “r” is too small the tip may also split or tear. Radius “r” is generally independent of catheter gauge.
- We have found that “r” may vary between 0.0001 inch and 0.0030 inches, preferably between 0.0001 inch and 0.0020 inches, and most preferably between 0.0005 inches and 0.0010 inches, for most common catheter materials. It should be understood that other values or “r” may be readily achieved using different materials.
- In addition, it is important that the
tip 14 be of overall convex configuration and that a convex, smoothly curving shape be maintained from the tip over the entire length “L”. Length “L” will vary depending upon the gauge of the catheter, and various lengths are considered within the scope of the invention. - By way of example and not by way of limitation, various dimensions for tips of the invention are provided in Table 1, wherein the radius and length are referenced in FIG. 2. Of course, different gauge catheters will have differently dimensioned tips, and the examples provided here are not intended to be exhaustive of all possible dimensions. For instance, for a very large catheter, “r” may be larger than the dimensions shown below. The lengths provided in table 1 are nominal lengths.
TABLE 1 Sample Gage Radius, r (inch) Length, L (inch) 1 18 0.00040 0.075 2 18 0.00015 0.075 3 18 0.00010 0.075 4 18 0.00011 0.075 5 22 0.00010 0.063 6 22 0.00020 0.063 - The above detailed description of the present invention is given for explanatory purposes. It will be apparent to those skilled in the art that numerous changes and modifications can be made without departing from the scope of the invention. Accordingly, the whole of the foregoing description is to be construed in an illustrative and not a limitative sense, the scope of the invention being defined solely by the appended claims.
Claims (11)
1. An insertion device comprising:
a tube including a first end and a second end, the first and second ends defining a first passageway;
a tip located at the first end, the tip including an inner wall and an outer wall and having a substantially curved surface profile;
wherein the outer wall contains no linear surfaces and the inner wall defines a substantially straight second passageway; and
wherein the second end is adapted to receive an attachment device.
2. The insertion device of claim 1 wherein the second passageway is adapted to receive a piercing device.
3. A catheter comprising:
a tube having substantially parallel walls and having a generally cylindrical profile;
a tip having a profile, an insertion end; and a connecting surface;
wherein the tip profile is substantially and generally parabolic beginning at a point at which the cylindrical profile of the catheter tube first begins to narrow; and
wherein the insertion end has a point of insertion having a substantially circular profile.
4. The insertion device of claim 1 , wherein the tip further comprises an insertion end including point of insertion having a substantially arcuate profile, the arc being described by a circle having a radius “r”, wherein the measurement of “r” is in the range of from about 0.0001 inches to about 0.0030 inches.
5. An insertion device comprising:
a tube including a tip having a profile, the tube further including a substantially cylindrical body;
wherein the tip comprises an insertion end and a surface section connecting said insertion end with the substantially cylindrical body, and the tip having a profile;
wherein the tip has a substantially curved surface profile; and
wherein the insertion end and the connecting surface section together define a length “L”.
6. The catheter of claim 3 wherein the tube is a catheter and wherein the second end includes attachment means for attaching the catheter to a device.
7. The catheter of claim 3 , wherein the tube is comprised of plastic.
8. The catheter of claim 7 , wherein said plastic is polyurethane.
9. The insertion device of claim 1 wherein the tube is comprised of plastic.
10. The insertion device of claim 1 , wherein the tube includes an interior surface and an exterior surface, said interior surface being adapted to receive a needle.
11. The catheter of claim 3 , wherein the tube includes an interior surface and an exterior surface, said interior surface being adapted to receive a needle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/870,508 US20040230164A1 (en) | 1999-10-28 | 2004-06-17 | Curved tip for an insertion device |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16232299P | 1999-10-28 | 1999-10-28 | |
US09/698,621 US6770059B1 (en) | 1999-10-28 | 2000-10-27 | Curved tip for an insertion device |
US10/870,508 US20040230164A1 (en) | 1999-10-28 | 2004-06-17 | Curved tip for an insertion device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/698,621 Continuation US6770059B1 (en) | 1999-10-28 | 2000-10-27 | Curved tip for an insertion device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040230164A1 true US20040230164A1 (en) | 2004-11-18 |
Family
ID=32775466
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/698,621 Expired - Fee Related US6770059B1 (en) | 1999-10-28 | 2000-10-27 | Curved tip for an insertion device |
US10/870,508 Abandoned US20040230164A1 (en) | 1999-10-28 | 2004-06-17 | Curved tip for an insertion device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/698,621 Expired - Fee Related US6770059B1 (en) | 1999-10-28 | 2000-10-27 | Curved tip for an insertion device |
Country Status (1)
Country | Link |
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US (2) | US6770059B1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8486024B2 (en) | 2011-04-27 | 2013-07-16 | Covidien Lp | Safety IV catheter assemblies |
US8628497B2 (en) | 2011-09-26 | 2014-01-14 | Covidien Lp | Safety catheter |
US8715250B2 (en) | 2011-09-26 | 2014-05-06 | Covidien Lp | Safety catheter and needle assembly |
US8834422B2 (en) | 2011-10-14 | 2014-09-16 | Covidien Lp | Vascular access assembly and safety device |
US8939938B2 (en) | 2006-10-12 | 2015-01-27 | Covidien Lp | Needle tip protector |
USD732660S1 (en) | 2012-02-02 | 2015-06-23 | Terumo Kabushiki Kaisha | Safety device for indwelling needle |
USD752737S1 (en) | 2012-02-02 | 2016-03-29 | Terumo Kabushiki Kaisha | Indwelling needle with safety device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6770059B1 (en) * | 1999-10-28 | 2004-08-03 | Span-America Medical Systems, Inc. | Curved tip for an insertion device |
WO2006044670A1 (en) * | 2004-10-14 | 2006-04-27 | Crossman Arthur W | Vascular catheter device and related method of using the same |
US7691081B2 (en) * | 2005-11-05 | 2010-04-06 | Crossman Arthur W | Expandable component guide wire system and related method of using the same |
US8137342B2 (en) * | 2005-12-24 | 2012-03-20 | Crossman Arthur W | Circumferential ablation guide wire system and related method of using the same |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3421509A (en) * | 1965-12-17 | 1969-01-14 | John M Fiore | Urethral catheter |
US3630198A (en) * | 1969-06-23 | 1971-12-28 | Henkin Melvyn Lane | Catheter placement device |
US4588398A (en) * | 1984-09-12 | 1986-05-13 | Warner-Lambert Company | Catheter tip configuration |
US4661300A (en) * | 1984-09-12 | 1987-04-28 | Becton, Dickinson And Company | Method and apparatus for flashless tipping of an I.V. catheter |
US4708147A (en) * | 1985-02-25 | 1987-11-24 | Haaga John R | Universal biopsy needle |
US4790830A (en) * | 1985-04-01 | 1988-12-13 | Hamacher Edward N | Infusion needle |
US5011478A (en) * | 1989-01-31 | 1991-04-30 | Cook Incorporation | Recessed dilator-sheath assembly and method |
US5053020A (en) * | 1990-04-06 | 1991-10-01 | The Upjohn Company | Applicator having two cannulas |
US5205830A (en) * | 1991-11-12 | 1993-04-27 | Arrow International Investment Corporation | Catheter assembly |
US5234416A (en) * | 1991-06-06 | 1993-08-10 | Advanced Cardiovascular Systems, Inc. | Intravascular catheter with a nontraumatic distal tip |
US5417665A (en) * | 1993-10-19 | 1995-05-23 | Cordis Corporation | Intravascular cannula |
US5425903A (en) * | 1993-09-10 | 1995-06-20 | Critikon, Inc. | Laser beveling process for catheters |
US5472417A (en) * | 1987-12-22 | 1995-12-05 | Vas-Cath Incorporated | Triple lumen catheter |
US5472435A (en) * | 1993-05-21 | 1995-12-05 | Navarre Biomedical, Ltd. | Drainage catheter |
US5489269A (en) * | 1993-11-10 | 1996-02-06 | Cook, Incorporated | Hard tip drainage catheter |
US5505713A (en) * | 1994-04-01 | 1996-04-09 | Minimed Inc. | Indwelling catheter with stable enzyme coating |
US5514112A (en) * | 1992-10-02 | 1996-05-07 | Boston Scientific Corporation | Drainage catheter and method of use |
US5683370A (en) * | 1996-06-06 | 1997-11-04 | Luther Medical Products, Inc. | Hard tip over-the-needle catheter and method of manufacturing the same |
US6770059B1 (en) * | 1999-10-28 | 2004-08-03 | Span-America Medical Systems, Inc. | Curved tip for an insertion device |
US6884253B1 (en) * | 2000-05-16 | 2005-04-26 | Taut, Inc. | Penetrating tip for trocar assembly |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0912871B2 (en) | 1996-07-26 | 2005-04-20 | Karl Stefan Riener | Device for securing a firearm, as well as for securing and/or storing objects |
-
2000
- 2000-10-27 US US09/698,621 patent/US6770059B1/en not_active Expired - Fee Related
-
2004
- 2004-06-17 US US10/870,508 patent/US20040230164A1/en not_active Abandoned
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3421509A (en) * | 1965-12-17 | 1969-01-14 | John M Fiore | Urethral catheter |
US3630198A (en) * | 1969-06-23 | 1971-12-28 | Henkin Melvyn Lane | Catheter placement device |
US4588398A (en) * | 1984-09-12 | 1986-05-13 | Warner-Lambert Company | Catheter tip configuration |
US4661300A (en) * | 1984-09-12 | 1987-04-28 | Becton, Dickinson And Company | Method and apparatus for flashless tipping of an I.V. catheter |
US4708147A (en) * | 1985-02-25 | 1987-11-24 | Haaga John R | Universal biopsy needle |
US4790830A (en) * | 1985-04-01 | 1988-12-13 | Hamacher Edward N | Infusion needle |
US5472417A (en) * | 1987-12-22 | 1995-12-05 | Vas-Cath Incorporated | Triple lumen catheter |
US5011478A (en) * | 1989-01-31 | 1991-04-30 | Cook Incorporation | Recessed dilator-sheath assembly and method |
US5053020A (en) * | 1990-04-06 | 1991-10-01 | The Upjohn Company | Applicator having two cannulas |
US5234416A (en) * | 1991-06-06 | 1993-08-10 | Advanced Cardiovascular Systems, Inc. | Intravascular catheter with a nontraumatic distal tip |
US5205830A (en) * | 1991-11-12 | 1993-04-27 | Arrow International Investment Corporation | Catheter assembly |
US5514112A (en) * | 1992-10-02 | 1996-05-07 | Boston Scientific Corporation | Drainage catheter and method of use |
US5472435A (en) * | 1993-05-21 | 1995-12-05 | Navarre Biomedical, Ltd. | Drainage catheter |
US5425903A (en) * | 1993-09-10 | 1995-06-20 | Critikon, Inc. | Laser beveling process for catheters |
US5417665A (en) * | 1993-10-19 | 1995-05-23 | Cordis Corporation | Intravascular cannula |
US5489269A (en) * | 1993-11-10 | 1996-02-06 | Cook, Incorporated | Hard tip drainage catheter |
US5505713A (en) * | 1994-04-01 | 1996-04-09 | Minimed Inc. | Indwelling catheter with stable enzyme coating |
US5683370A (en) * | 1996-06-06 | 1997-11-04 | Luther Medical Products, Inc. | Hard tip over-the-needle catheter and method of manufacturing the same |
US6770059B1 (en) * | 1999-10-28 | 2004-08-03 | Span-America Medical Systems, Inc. | Curved tip for an insertion device |
US6884253B1 (en) * | 2000-05-16 | 2005-04-26 | Taut, Inc. | Penetrating tip for trocar assembly |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8939938B2 (en) | 2006-10-12 | 2015-01-27 | Covidien Lp | Needle tip protector |
US8486024B2 (en) | 2011-04-27 | 2013-07-16 | Covidien Lp | Safety IV catheter assemblies |
US8926563B2 (en) | 2011-04-27 | 2015-01-06 | Covidien Lp | Safety IV catheter assemblies |
US8628497B2 (en) | 2011-09-26 | 2014-01-14 | Covidien Lp | Safety catheter |
US8715250B2 (en) | 2011-09-26 | 2014-05-06 | Covidien Lp | Safety catheter and needle assembly |
US9375552B2 (en) | 2011-09-26 | 2016-06-28 | Covidien Lp | Safety needle assembly |
US8834422B2 (en) | 2011-10-14 | 2014-09-16 | Covidien Lp | Vascular access assembly and safety device |
USD732660S1 (en) | 2012-02-02 | 2015-06-23 | Terumo Kabushiki Kaisha | Safety device for indwelling needle |
USD752737S1 (en) | 2012-02-02 | 2016-03-29 | Terumo Kabushiki Kaisha | Indwelling needle with safety device |
Also Published As
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US6770059B1 (en) | 2004-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: NATIONAL BANK OF CANADA, CANADA Free format text: SECURITY INTEREST;ASSIGNOR:SPAN-AMERICA MEDICAL SYSTEMS, INC.;REEL/FRAME:055509/0001 Effective date: 20210304 |