WO2025101332A1

WO2025101332A1 - Magnetic resonance imaging (mri) compliant luer-bayonet adapter

Info

Publication number: WO2025101332A1
Application number: PCT/US2024/051569
Authority: WO
Inventors: Scott Wesley WOOSTER
Original assignee: Johns Hopkins University
Current assignee: Johns Hopkins University
Priority date: 2023-11-07
Filing date: 2024-10-16
Publication date: 2025-05-15
Anticipated expiration: 2026-05-07

Abstract

A MRI-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs is disclosed. The MRI-safe female bayonet for male Luer adapter including a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a resilient member that provide a bias to the removable activation structure.

Description

MAGNETIC RESONANCE IMAGING (MRI) COMPLIANT LUER-BAYONET

ADAPTER

Cross Reference to Related Applications

[0001] This application claims benefit of priority to U.S. Provisional Patent Application Serial No. 63/596,841 filed on November 7, 2023, the contents of which are hereby incorporated by reference in its entirety.

Field

[0002] The present disclosure relates to magnetic resonance imaging (MRI) compliant Luer-bayonet adapters.

Background

[0003] The global MRI systems market is growing steadily and is estimated to reach $6.15 billion USD by 2025 at a compound annual growth rate of 4.1%. The global market for the MRI compatible patient monitoring system is expected to increase significantly during the forecast period from 2020 to 2026. In 2020, the market was growing at a steady rate, and with the increasing adoption of strategies by key players, the market is expected to rise over the projected horizon.

[0004] Basic physiological parameters, such as respiration and heart rate, are essential for predicting the risk of anxiety, panic, and claustrophobic episodes in patients undergoing MRI examinations. However, electronic transducers are generally hazardous to the patient and are prone to incorrect operation in highly electromagnetically penetrated MRI environments.

[0005] MRI cuffs and physiological monitors use a Luer-lock style connector made from plastic, non-ferrous material. Traditional non-invasive blood pressure (NBP) cuffs are bayonet style connectors where the male end can be plastic or metal, but the female end is predominantly metal or at least comprised of ferrous springs that are non-MRI compliant. There are no Luer lock to Bayonet adapters on the market that are MRI compliant. Female bayonet connectors are all metal, hence why MRI units all use Luer lock. Male Bayonets are traditionally plastic, so this adapter allows the use of both cuff styles.

[0006] Therefore, the is a need in the art for an improved Luer-bayonet adaptor that is MRI compliant. Summary

[0007] According to examples of the present disclosure, a MRI-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs is disclosed. The MRI-safe female bayonet for male Luer adapter comprising: a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a resilient member that provide a bias to the removable activation structure.

[0008] Various additional features can be included in the MRI-safe female bayonet for male Luer adapter including one or more of the following features. The interior of female bayonet connector further comprises a sidewall that provides a housing for the resilient member with an interior side of the housing. The resilient member has a height that exceeds a height of the sidewall and the interior side of the housing. The resilient member is a MRI-safe mylar tube. The resilient member has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

[0009] According to examples of the present disclosure, a system is disclosed. The system comprises a magnetic resonance imaging (MRI)-safe blood pressure cuff; and a MRI-safe female bayonet for male Luer adapter connected to the MRI-safe blood pressure cuff, the MRI- safe female bayonet for male Luer adapter comprising a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a resilient member that provide a bias to the removable activation structure.

[0010] Various additional features can be included in the system including one or more of the following features. The interior of female bayonet connector further comprises a sidewall that provides a housing for the resilient member with an interior side of the housing. The resilient member has a height that exceeds a height of the sidewall and the interior side of the housing. The resilient member is a MRI-safe mylar tube. The resilient member has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

[0011] According to examples of the present disclosure, a magnetic resonance imaging (MRI)-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs. The MRI-safe female bayonet for male Luer adapter comprise a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a MRI-safe mylar tube that provide a bias to the removable activation structure.

[0012] Various additional features can be included in the MRI-safe female bayonet for male Luer adapter including one or more of the following features. The interior of female bayonet connector further comprises a sidewall that provides a housing for the MRI-safe mylar tube with an interior side of the housing. The MRI-safe mylar tube has a height that exceeds a height of the sidewall and the interior side of the housing. The MRI-safe mylar tube has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

Brief Description of the Drawings

[0013] FIG. 1 shows a MRI-safe female bayonet for male Luer adapter in a disassembled state for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure.

[0014] FIG. 2 shows the MRI-safe female bayonet for male Luer adapter of FIG. 1 in an assembled state for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure.

[0015] FIG. 3 shows MRI-safe female bayonet for male Luer adapter showing an internal view of female bayonet connector 106 for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure.

[0016] FIG. 4 shows a prior art confirmation of a blood pressure adapter.

[0017] FIG. 5 shows a MRI-safe female bayonet for male Luer adapter connected to a blood pressure cuff according to examples of the present disclosure.

[0018] FIG. 6 shows the MRI-safe female bayonet for male Luer adapter in a disassembled state indicating example sizing for the internal tubing according to examples of the present disclosure.

Detailed Description

[0019] Reference will now be made in detail to the present embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0020] Generally speaking, an MRI- safe female bayonet for male Luer adapter for non- invasive blood pressure (NIBP) cuffs is disclosed. Existing devices of all female bayonet connectors use a metallic component that renders the device- incompatible. In one non-limiting example, a female bayonet connector includes a piece of compliant mylar tube or similar functional type component that provides for similar functionality that internal springs in existing models contain.

[0021] The present adapter enables the use of MR NIBP cuffs and standard NBP cuffs. The MR disposable cuffs are three times as expensive as the standard cuffs and are always on the back order. This present device allows the patient to be cuffed during pre-op or exam and the patient can keep the same cuff on during MRI. This will significantly reduce the cost of the hospital.

[0022] FIG. 1 shows MRI-safe female bayonet for male Luer adapter 100 in a disassembled state for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure. FIG. 2 shows the MRI-safe female bayonet for male Luer adapter 200 of FIG. 1 in an assembled state for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure. FIG. 3 shows MRI-safe female bayonet for male Luer adapter 300 showing an internal view of female bayonet connector 106 for non-invasive blood pressure (NIBP) cuffs according to examples of the present disclosure. Male bayonet quick connect 102 on NIBP cuff side 124 comprises male end 104 that couples with female end 122 of female bayonet connector 106 and another end that couples with the NIBP cuff (not shown). Female bayonet connector 106 comprises actuator 108, such as a depressible button, that actuates female bayonet connector 106). On the other end of female bayonet connector 106, female bayonet connector 106 comprises a female bayonet connector male end 110. According to a non-limiting example, female bayonet connector 106 can be a type or similar type sold such as a Welch Allyn 1319 bayonet connector, barb X female connection, 5/32 inch connection by Welch Allyn Inc. in Chicago, IL. Other similar types of female bayonet connectors can be used that do not contain any non-MRI safe components. Male bayonet quick connect 114 on invivo side 126 comprises male end 116 that couples with female bayonet connector male end 110 of female bayonet connector 106 via tubing 112. On the other end, male bayonet quick connect 114 comprises female end that couples with male connector 118 of tubing 128. As shown in FIG. 3, actuator 108 is removed showing the internal structure of female bayonet connector 106. Within the housing of female bayonet connector 106, side compartment 130 that is defined by sidewall 132 is shown. Resilient member 120, such a plastic tubing or similar material, is arranged in side compartment 130 to provide biasing or elastic activation of actuator 108, when actuated by depressing by a user releases the male bayonet connector, such as female bayonet connector male end 110. For example, resilient member 120 can be a MRI-compliant mylar tube having dimensions including length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm. Other suitable sizes for the MRI- complaint mylar tubing or other suitable MRI-complaint tubing or flexible material can be used such that the length fits within the internal compartment of the female bayonet connector 106 and the height of the MRI-complaint mylar tubing or other suitable MRI-complaint tubing or flexible material slightly exceeds the uncompressed height of the sidewall of the female bayonet connector 106 when actuator 108 is removed. When actuator 108 is replaced onto to female bayonet connector 106, resilient member 120, such as the MRI-complaint mylar tubing or other suitable MRI-complaint tubing or flexible material, is deformed and/or compressed to provide a biasing or spring-like function on actuator 108. Resilient member 120 can be composed of a plastic material, a polyester material such as a polyethylene terephthalate (PET), or other similar non-ferrous material.

[0023] Each component of MRI-safe female bayonet for male Luer adapter 100 is made of MRI-safe materials, such as plastic, rubber, or other similar non-metallic materials or composite materials.

[0024] FIG. 4 shows a prior art confirmation of a blood pressure adapter. FIG. 5 shows a MRI-safe female bayonet for male Luer adapter connected to a blood pressure cuff according to examples of the present disclosure. FIG. 6 shows the MRI-safe female bayonet for male Luer adapter in a disassembled state indicating example sizing for the internal tubing according to examples of the present disclosure.

[0025] The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. Moreover, the order in which the elements of the methods are illustrated and described may be re-arranged, and/or two or more elements may occur simultaneously. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated.

[0026] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Moreover, all ranges disclosed herein are to be understood to encompass any and all sub-ranges subsumed therein. For example, a range of "less than 10" can include any and all sub-ranges between (and including) the minimum value of zero and the maximum value of 10, that is, any and all sub-ranges having a minimum value of equal to or greater than zero and a maximum value of equal to or less than 10, e.g., 1 to 5. In certain cases, the numerical values as stated for the parameter can take on negative values. In this case, the example value of range stated as “less than 10” can assume negative values, e.g. -1, -2, -3, - 10, -20, -30, etc.

[0027] The following embodiments are described for illustrative purposes only with reference to the Figures. Those of skill in the art will appreciate that the following description is exemplary in nature, and that various modifications to the parameters set forth herein could be made without departing from the scope of the present embodiments. It is intended that the specification and examples be considered as examples only. The various embodiments are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments.

[0028] While the embodiments have been illustrated respect to one or more implementations, alterations and/or modifications can be made to the illustrated examples without departing from the spirit and scope of the appended claims. In addition, while a particular feature of the embodiments may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular function. [0029] Furthermore, to the extent that the terms “including”, “includes”, “having”, “has”, “with”, or variants thereof are used in either the detailed description and the claims, such terms are intended to be inclusive in a manner similar to the term “comprising.” As used herein, the phrase “one or more of’, for example, A, B, and C means any of the following: either A, B, or C alone; or combinations of two, such as A and B, B and C, and A and C; or combinations of A, B and C.

[0030] Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the descriptions disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the embodiments being indicated by the following claims.

Claims

What is Claimed is:

1. A magnetic resonance imaging (MRI)-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs, the MRI-safe female bayonet for male Luer adapter comprising: a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a resilient member that provide a bias to the removable activation structure.

2. The MRI-safe female bayonet for male Luer adapter of claim 1 , wherein the interior of female bayonet connector further comprises a sidewall that provides a housing for the resilient member with an interior side of the housing.

3. The MRI-safe female bayonet for male Luer adapter of claim 2, wherein the resilient member has a height that exceeds a height of the sidewall and the interior side of the housing.

4. The MRI-safe female bayonet for male Luer adapter of claim 1, wherein the resilient member is a MRI-safe mylar tube.

5. The MRI-safe female bayonet for male Luer adapter of claim 1, wherein the resilient member has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

6. A system comprising: a magnetic resonance imaging (MRI)-safe blood pressure cuff; and a MRI-safe female bayonet for male Luer adapter connected to the MRI-safe blood pressure cuff, the MRI-safe female bayonet for male Luer adapter comprising a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a resilient member that provide a bias to the removable activation structure.

7. The system of claim 6, wherein the interior of female bayonet connector further comprises a sidewall that provides a housing for the resilient member with an interior side of the housing.

8. The system of claim 7, wherein the resilient member has a height that exceeds a height of the sidewall and the interior side of the housing.

9. The system of claim 6, wherein the resilient member is a MRI-safe mylar tube.

10. The system of claim 6, wherein the resilient member has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

11. A magnetic resonance imaging (MRI)-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs, the MRI-safe female bayonet for male Luer adapter comprising: a female bayonet connector comprising a housing having a removable activation structure that covers and provides access to an interior of the female bayonet connector and a MRI-safe mylar tube that provide a bias to the removable activation structure.

12. The MRI-safe female bayonet for male Luer adapter of claim 11, wherein the interior of female bayonet connector further comprises a sidewall that provides a housing for the MRI-safe mylar tube with an interior side of the housing.

13. The MRI-safe female bayonet for male Luer adapter of claim 12, wherein the MRI- safe mylar tube has a height that exceeds a height of the sidewall and the interior side of the housing.

14. The MRI-safe female bayonet for male Luer adapter of claim 11, wherein the MRI- safe mylar tube has dimensions comprising a length of about 6.75 mm ± 1.5 mm, an inner diameter of about 2.6 mm ± 0.5 mm, and an outer diameter of about 3.75 ± 0.5 mm.

15. A method of using a magnetic resonance imaging (MRI)-safe female bayonet for male Luer adapter for non-invasive blood pressure (NIBP) cuffs as shown and described in the various examples provided herein.