Patents by Inventor Mark A. Christensen
Mark A. Christensen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230398345Abstract: A fluid control component configured for controlling fluid flow through the hub of a catheter assembly during and after placement into the patient is disclosed. In one embodiment, the fluid control component comprises a body disposed within a cavity of the hub, the body being movable between a first position and a second position, wherein the body does not pierce a valve disposed in the hub when in the first position and wherein the body pierces the valve when in the second position. The body includes a conduit to enable fluid flow through an internal portion of the body when the body is in the second position, and a plurality of longitudinal ribs disposed on an exterior surface of the body. The longitudinal ribs can provide fluid flow channels between the valve and an external portion of the body when the body is in the second position.Type: ApplicationFiled: August 25, 2023Publication date: December 14, 2023Inventors: Huy Ngoc Tran, Mark A. Christensen, Chad A. Hadley, Jason R. Stats
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Patent number: 11793989Abstract: A method for making a catheter. The method includes forming a catheter tube including an outer wall circumscribing at least one lumen and having a closed distal end, and creating a slit valve in a distal segment of the catheter tube proximal of the closed distal end. The slit valve includes a slit through the outer wall and a compliant segment designed to facilitate inward deflection of a portion of the outer wall along the slit when negative pressure is applied to the at least one lumen. The compliant segment is circumferentially spaced apart from the slit.Type: GrantFiled: July 15, 2020Date of Patent: October 24, 2023Assignee: C. R. Bard, Inc.Inventors: Jeremy B. Cox, Daniel B. Blanchard, Mark A. Christensen
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Patent number: 11759618Abstract: A fluid control component configured for controlling fluid flow through the hub of a catheter assembly during and after placement into the patient is disclosed. In one embodiment, the fluid control component comprises a body disposed within a cavity of the hub, the body being movable between a first position and a second position, wherein the body does not pierce a valve disposed in the hub when in the first position and wherein the body pierces the valve when in the second position. The body includes a conduit to enable fluid flow through an internal portion of the body when the body is in the second position, and a plurality of longitudinally extending ribs disposed on an exterior surface of the body. The ribs provide at least one fluid flow channel between the valve and an external portion of the body when the body is in the second position.Type: GrantFiled: November 26, 2019Date of Patent: September 19, 2023Assignee: C. R. Bard, Inc.Inventors: Huy N. Tran, Mark A. Christensen, Chad A. Hadley
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Patent number: 11659962Abstract: A disposable liner for use with a reusable infant's bathtub. A workable liner may be formed from two parallel flat sheets of plastic film, bonded together around an outside boundary. The liner is disposable in a flat configuration of minimum thickness, and can then be folded to form a space-efficient rectangular package of substantially constant thickness. Certain liners may include a backrest cushion.Type: GrantFiled: March 26, 2021Date of Patent: May 30, 2023Assignee: Catapult Products, LLCInventors: Daniel B. Blanchard, Dana L. Denton, Marshall T. Denton, William C. Ballard, Mark A. Christensen
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Publication number: 20220233788Abstract: An atomizing nozzle structured particularly for nasal therapy. Preferred embodiments include a 2-piece atomizing nozzle structured to couple with luer-locking structure carried by a syringe. Such an atomizing nozzle includes a nasal stopper and a stem. A preferred nasal stopper includes a distal tip sized for insertion into a nostril of a human child, with a proximal shield portion being structured to resist over-insertion of a discharge orifice into the nostril. A nasal stopper desirably provides a centering function to urge the discharge orifice away from a nasal wall. One operable stem is structured to couple with the stopper and desirably carries unitary thread structure at a proximal end. A second operable stem is structured as a unitary part of the nasal stopper and also desirably carries unitary thread structure at a proximal end. Certain embodiments may also include spacer structure configured to reduce a dead volume inside the atomizing nozzle.Type: ApplicationFiled: February 7, 2022Publication date: July 28, 2022Inventors: Marshall T. DENTON, Perry W. CROLL, Mark A. CHRISTENSEN, Timothy R. WOLFE, J. Michael BROWN
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Patent number: 11241547Abstract: An atomizing nozzle structured particularly for nasal therapy. Preferred embodiments include a 2-piece atomizing nozzle structured to couple with luer-locking structure carried by a syringe. Such an atomizing nozzle includes a nasal stopper and a stem. A preferred nasal stopper includes a distal tip sized for insertion into a nostril of a human child, with a proximal shield portion being structured to resist over-insertion of a discharge orifice into the nostril. A nasal stopper desirably provides a centering function to urge the discharge orifice away from a nasal wall. One operable stem is structured to couple with the stopper and desirably carries unitary thread structure at a proximal end. A second operable stem is structured as a unitary part of the nasal stopper and also desirably carries unitary thread structure at a proximal end. Certain embodiments may also include spacer structure configured to reduce a dead volume inside the atomizing nozzle.Type: GrantFiled: November 11, 2011Date of Patent: February 8, 2022Assignee: TELFLEX MEDICAL INCORPORATEDInventors: Marshall T. Denton, Perry W. Croll, Mark A. Christensen, Timothy R. Wolfe, J. Michael Brown
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Patent number: 11207496Abstract: A magnetic stylet includes a core element and a distal region. The core element may include a proximal end coupled to a tab, the proximal end having a first diameter, a transition region, and a distal region extending from the transition region to a distal end. The distal region may have a second diameter less than the first diameter. The distal section may include the transition region and the distal region of the core element, a magnetic element, a polymer member, and a closure element. The magnetic element may be positioned distal of the transition region of the core element. The polymer member may be circumferentially disposed about the distal region of the core element, the continuous permanent magnetic element, and at least a portion of the transition region of the core element. The closure element may be an epoxy that forms a rounded end distal of the polymer member.Type: GrantFiled: June 25, 2018Date of Patent: December 28, 2021Assignee: C. R. Bard, Inc.Inventors: Matthew W. Bown, Mark A. Christensen, Guy Rome, Bret Hamatake
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Publication number: 20210308428Abstract: An insertion device for inserting a catheter into a patient's body is disclosed. In some embodiments, the insertion device combines needle insertion, guidewire advancement, catheter insertion, and needle shielding in a single device. In one embodiment, the insertion device comprises a housing including a hollow needle distally extending from the housing. At least a portion of the catheter is pre-disposed over the needle such that the catheter is disposed substantially external to the housing. A guidewire is included, as well as an advancement assembly that is configured to selectively advance the distal end of the guidewire out a distal opening of the needle in preparation for distal advancement of the catheter. The advancement assembly is further configured to enable distal catheter advancement before shielding the needle after use. The insertion device is configured to be grasped and used by a single hand of a user.Type: ApplicationFiled: June 21, 2021Publication date: October 7, 2021Inventors: Daniel B. Blanchard, Huy Ngoc Tran, Rex A. Ribelin, Thomas S. Russell, Amir Orome, Jordan P. Diamond, Eric W. Lindekugel, Mark A. Christensen, Jay A. Muse
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Publication number: 20210298536Abstract: A disposable liner for use with a reusable infant's bathtub. A workable liner may be formed from two parallel flat sheets of plastic film, bonded together around an outside boundary. The liner is disposable in a flat configuration of minimum thickness, and can then be folded to form a space-efficient rectangular package of substantially constant thickness. Certain liners may include a backrest cushion.Type: ApplicationFiled: March 26, 2021Publication date: September 30, 2021Inventors: Daniel B. Blanchard, Dana L. Denton, Marshall T. Denton, William C. Ballard, Mark A. Christensen
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Patent number: 11040176Abstract: An insertion device for inserting a catheter into a patient's body is disclosed. The insertion device combines needle insertion, guidewire advancement, catheter insertion, and needle shielding in a single device. In one embodiment, the insertion device comprises a housing including a hollow needle distally extending from the housing. At least a portion of the catheter is pre-disposed over the needle such that the catheter is disposed substantially external to the housing. A guidewire is included, as well as an advancement assembly that is configured to selectively advance the distal end of the guidewire out a distal opening of the needle in preparation for distal advancement of the catheter. The advancement assembly is further configured to enable distal catheter advancement before shielding the needle after use. The insertion device is configured to be grasped and used by a single hand of a user during advancement of the guidewire and the catheter.Type: GrantFiled: May 13, 2016Date of Patent: June 22, 2021Assignee: C. R. Bard, Inc.Inventors: Daniel B. Blanchard, Huy Ngoc Tran, Rex A. Ribelin, Thomas S. Russell, Amir Orome, Jordan P. Diamond, Eric W. Lindekugel, Mark A. Christensen, Jay A. Muse
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Patent number: 10946123Abstract: A catheter connector assembly which may be included with a corporeal drainage system, and a method of draining fluid from a bodily cavity. The catheter connector assembly may include a catheter connector and a drainage line connector. The catheter connector may include a connector body with a coupling feature, a deformable sealing element, and a retaining member. The drainage line connector may include a drainage line body first and second hinge clips, and an actuator. The actuator is designed to deform the deformable sealing element when the drainage line connector is coupled to the catheter connector.Type: GrantFiled: March 6, 2018Date of Patent: March 16, 2021Assignee: Merit Medical Systems, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Jim C. Beasley, Kelly B. Powers
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Publication number: 20200345999Abstract: A method for making a catheter. The method includes forming a catheter tube including an outer wall circumscribing at least one lumen and having a closed distal end, and creating a slit valve in a distal segment of the catheter tube proximal of the closed distal end. The slit valve includes a slit through the outer wall and a compliant segment designed to facilitate inward deflection of a portion of the outer wall along the slit when negative pressure is applied to the at least one lumen. The compliant segment is circumferentially spaced apart from the slit.Type: ApplicationFiled: July 15, 2020Publication date: November 5, 2020Inventors: Jeremy B. Cox, Daniel B. Blanchard, Mark A. Christensen
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Patent number: 10722700Abstract: A bi-directional valve assembly, including valves for use in closed-ended catheters or other elongate tubular devices, is disclosed. In one embodiment, a catheter assembly for insertion into a body of a patient is disclosed and comprises an elongate catheter tube including an outer wall that at least partially defines at least one lumen that extends between a proximal end and a closed distal end thereof. The catheter tube includes a valve assembly that in turn includes a linear slit valve defined through the outer wall of a distal segment of the catheter tube, and a deformation region. The deformation region includes a compliant segment disposed in the outer wall of the catheter tube and a thinned portion of the outer wall. The compliant segment and thinned portion of the deformation region cooperate to preferentially deform the outer wall and open the slit valve during aspiration through the catheter tube.Type: GrantFiled: October 17, 2017Date of Patent: July 28, 2020Assignee: C. R. Bard, Inc.Inventors: Jeremy B. Cox, Daniel B. Blanchard, Mark A. Christensen
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Publication number: 20200094037Abstract: A fluid control component configured for controlling fluid flow through the hub of a catheter assembly during and after placement into the patient is disclosed. In one embodiment, the fluid control component comprises a body disposed within a cavity of the hub, the body being movable between a first position and a second position, wherein the body does not pierce a valve disposed in the hub when in the first position and wherein the body pierces the valve when in the second position. The body includes a conduit to enable fluid flow through an internal portion of the body when the body is in the second position, and a plurality of longitudinally extending ribs disposed on an exterior surface of the body. The ribs provide at least one fluid flow channel between the valve and an external portion of the body when the body is in the second position.Type: ApplicationFiled: November 26, 2019Publication date: March 26, 2020Inventors: Huy N. Tran, Mark A. Christensen, Chad A. Hadley, Jason R. Stats
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Publication number: 20200000984Abstract: A catheter connector assembly which may be included with a corporeal drainage system, and a method of draining fluid from a bodily cavity. The catheter connector assembly may include a catheter connector and a drainage line connector. The catheter connector may include a connector body with a coupling feature, a deformable sealing element, and a retaining member. The drainage line connector may include a drainage line body first and second hinge clips, and an actuator. The actuator is designed to deform the deformable sealing element when the drainage line connector is coupled to the catheter connector.Type: ApplicationFiled: September 12, 2019Publication date: January 2, 2020Inventors: Mark A. Christensen, Steven M. Smith, Jim C. Beasley, Kelly B. Powers
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Patent number: 10493262Abstract: A fluid control component configured for controlling fluid flow through the hub of a catheter assembly during and after placement into the patient is disclosed. In one embodiment, the fluid control component comprises a body disposed within a cavity of the hub, the body being movable between a first position and a second position, wherein the body does not pierce a valve disposed in the hub when in the first position and wherein the body pierces the valve when in the second position. The body includes a conduit to enable fluid flow through an internal portion of the body when the body is in the second position, and a plurality of longitudinally extending ribs disposed on an exterior surface of the body. The ribs provide at least one fluid flow channel between the valve and an external portion of the body when the body is in the second position.Type: GrantFiled: September 12, 2017Date of Patent: December 3, 2019Assignee: C. R. Bard, Inc.Inventors: Huy N. Tran, Mark A. Christensen, Chad A. Hadley, Jason R. Stats
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Patent number: 10426931Abstract: An insertion tool for inserting a catheter into a body of a patient is disclosed. The insertion tool unifies needle insertion, guidewire advancement, and catheter insertion in a single device. In one embodiment, the insertion tool comprises a housing in which at least a portion of the catheter is initially disposed, a hollow needle distally extending from the housing with at least a portion of the catheter pre-disposed over the needle, and a guidewire pre-disposed within the needle. A guidewire advancement assembly is also included for selectively advancing the guidewire distally past a distal end of the needle in preparation for distal advancement of the catheter. In one embodiment a catheter advancement assembly is also included for selectively advancing the catheter into the patient. Each advancement assembly can include a slide or other actuator that enables a user to selectively advance the desired component.Type: GrantFiled: December 30, 2014Date of Patent: October 1, 2019Assignee: C. R. Bard, Inc.Inventors: Daniel B. Blanchard, John W. Hall, Jason R. Stats, Mark A. Christensen
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Publication number: 20190274722Abstract: A valved sheath introducer for venous cannulation, including a valve, sheath, handle and cap. The valve is configured to permit safe introduction and removal of medical instruments through the sheath introducer. The valve may have one or more anchoring members and a thickened central portion through which a slit is formed. The central portion may have one or more concave surfaces and the slit can be angled with respect to the top surface of the valve. The cap is attached to the handle, compressing a portion of the valve therebetween.Type: ApplicationFiled: May 24, 2019Publication date: September 12, 2019Inventors: Mark A. Christensen, Walter H. Shang, Steven M. Smith, James D. Beal
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Patent number: 10307182Abstract: A valved sheath introducer for venous cannulation, including a valve, sheath, handle and cap. The valve is configured to permit safe introduction and removal of medical instruments through the sheath introducer. The valve may have one or more anchoring members and a thickened central portion through which a slit is formed. The central portion may have one or more concave surfaces and the slit can be angled with respect to the top surface of the valve. The cap is attached to the handle, compressing a portion of the valve therebetween.Type: GrantFiled: June 24, 2015Date of Patent: June 4, 2019Assignee: C. R. Bard, Inc.Inventors: Mark A. Christensen, Steven M. Smith, Walter H. Shang, James D. Beal
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Publication number: 20180304043Abstract: A magnetic stylet includes a core element and a distal region. The core element may include a proximal end coupled to a tab, the proximal end having a first diameter, a transition region, and a distal region extending from the transition region to a distal end. The distal region may have a second diameter less than the first diameter. The distal section may include the transition region and the distal region of the core element, a magnetic element, a polymer member, and a closure element. The magnetic element may be positioned distal of the transition region of the core element. The polymer member may be circumferentially disposed about the distal region of the core element, the continuous permanent magnetic element, and at least a portion of the transition region of the core element. The closure element may be an epoxy that forms a rounded end distal of the polymer member.Type: ApplicationFiled: June 25, 2018Publication date: October 25, 2018Inventors: Matthew W. Bown, Mark A. Christensen, Guy Rome, Bret Hamatake