Mark A Christensen

US Patent:

6402724, Jun 11, 2002

Filed:

Mar 1, 1999

Appl. No.:

09/260626

Inventors:

Steven M. Smith - Salt Lake City UT
Mark A. Christensen - Salt Lake City UT
Deborah K. Jacobson - Saukville WI

Assignee:

Wolfe Tory Medical, Inc. - Salt Lake City UT

International Classification:

A61M 3500

US Classification:

604289, 604268

Abstract:

A splash shield for use in wound irrigation comprises a three-dimensional shield member having a peripheral edge and a surface extending from the peripheral edge, the shield member being formed at least in part of flexible and pliant material for selectively shaping the peripheral edge to fit the shape or dimension of a wound, and an adjustable hub extending from the surface of the shield member configured to be circumferentially adjustable to adapt to the fluid end portion of any number and variety of irrigation fluid delivery devices. An attachable drain tube and a splash shield having an attached drain tube for removing fluid from the wound site is also disclosed.

US Patent:

6635020, Oct 21, 2003

Filed:

Jun 26, 2001

Appl. No.:

09/892155

Inventors:

Mark A. Christensen - Salt Lake City UT
Eric Simon - Salt Lake City UT

Assignee:

Thermometrics - Salt Lake City UT

International Classification:

A61B 5021

US Classification:

600488, 73 157, 73721, 73756, 116200, 116283, 116284, 600486, 600487, 600561

Abstract:

An apparatus for monitoring fluid pressure includes a reusable base section, and a disposable dome section detachably connected to the base section. The disposable dome section defines a fluid pathway and includes a dome viewing segment in fluid communication with a flush segment and a stopcock segment. A pressure transducer sensor is disposed in the reusable base section and is adapted to produce electrical signals proportional to fluid pressures sensed in the fluid pathway. A usage indicator can be disposed in the base section to provide a visual indication of usage of the apparatus within a predetermined number of uses. A calibration port can be provided in the base section to allow for simple calibration by the user without violating the sterility of the apparatus. The ability to reuse the base section with the sensor component reduces the cost of the apparatus, while the disposability of the dome section with the fluid pathway ensures sterility for each use.

US Patent:

6708950, Mar 23, 2004

Filed:

Mar 15, 2002

Appl. No.:

10/099304

Inventors:

Mark A. Christensen - Salt Lake City UT
Marshall T. Denton - Salt Lake City UT

Assignee:

Wolfe Tory Medical - Salt Lake City UT

International Classification:

F16K 3100

US Classification:

251342, 220714, 23953313, 2241482

Abstract:

An improved bite valve for use in personal hydration devices and other water dispensing systems. The valve has a flexible conduit sealed at an end by a cap. Fluid is blocked from flowing out of the conduit by the cap. The cap provides a fluid seal as a ring around an exterior surface of the conduit. Biting an end of the conduit, near the cap, radially separates the conduit from the cap, permitting fluid to flow into a persons mouth. The configuration of the valve permits a larger valve opening, and correspondingly improved fluid flow through the valve. A positive stop mechanism, to prevent undesired fluid flow, may also be provided in a valve.

US Patent:

7112177, Sep 26, 2006

Filed:

Mar 4, 2003

Appl. No.:

10/379222

Inventors:

Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US

Assignee:

Wolfe Tory Medical, Inc. - Salt Lake City UT

International Classification:

A61B 5/00

US Classification:

600561

Abstract:

An apparatus for monitoring intra-abdominal pressure in a medical patient includes a urinary catheter connected to a urine valve having selectable communication positions between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve has a housing adapted to resist patient discomfort from body-valve contact. A plumbing structure desirably maintains fluid supply and drain conduits in a substantially parallel arrangement to assist routing those conduits between a patient's legs. When the urine valve is oriented for communication with the fluid source, a syringe may be used to introduce a known quantity of fluid through the urine valve into the patient's bladder where the fluid's pressure can be measured. Desirably, a double check valve is included in a fluid supply path and arranged to permit repetitive operation of the syringe to introduce a bolus of fluid into the patient's bladder.

US Patent:

7637893, Dec 29, 2009

Filed:

May 2, 2005

Appl. No.:

11/119599

Inventors:

Mark A. Christensen - Salt Lake City UT, US
Steven M. Smith - Salt Lake City UT, US
Walter Shang - Irvine CA, US
James D. Beal - Spanish Fork UT, US

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 5/178

US Classification:

60416704, 604256, 60416401, 60416701, 60416702, 60416703, 604201, 604202, 604205, 604236, 604264, 251334, 137844, 137849

Abstract:

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.

US Patent:

7644722, Jan 12, 2010

Filed:

Aug 9, 2005

Appl. No.:

11/199790

Inventors:

Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US

Assignee:

Wolfe Tory Medical, Inc. - Salt Lake City UT

International Classification:

G05D 7/00
G05D 9/00

US Classification:

137107, 251 33, 251 45

Abstract:

An apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve providing selectable communication between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve is adapted for remote actuatation and has a housing adapted to resist patient discomfort from leg-valve contact. Plumbing structure desirably maintains fluid supply and drain conduits in a substantially parallel arrangement to assist routing those conduits between a patient's legs. When the urine valve is oriented to permit communication with the fluid source, an infusion pump may be used to infuse a known quantity of fluid through the urine valve and into the patient's bladder. A pressure transducer desirably is connected in-circuit to indicate the fluid's pressure. To facilitate the infusion process, an automatic flow control device may be included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder.

US Patent:

7726328, Jun 1, 2010

Filed:

Aug 26, 2009

Appl. No.:

12/583823

Inventors:

Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Sandy UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US

Assignee:

Wolfe Tory Medical, Inc. - Salt Lake City UT

International Classification:

G05D 7/00
G05D 9/00

US Classification:

137107, 251 45

Abstract:

An apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve providing selectable communication between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve is adapted for remote actuation and has a housing adapted to resist patient discomfort from leg-valve contact. Plumbing structure desirably maintains fluid supply and drain conduits in a substantially parallel arrangement to assist routing those conduits between a patient's legs. When the urine valve is oriented to permit communication with the fluid source, an infusion pump may be used to infuse a known quantity of fluid through the urine valve and into the patient's bladder. A pressure transducer desirably is connected in-circuit to indicate the fluid's pressure. To facilitate the infusion process, an automatic flow control device may be included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder.

US Patent:

7892181, Feb 22, 2011

Filed:

Sep 1, 2005

Appl. No.:

11/219319

Inventors:

Mark A. Christensen - Salt Lake City UT, US
Timothy R. Wolfe - Salt Lake City UT, US
Perry W. Croll - Salt Lake City UT, US
Marshall T. Denton - Salt Lake City UT, US
Edward J. Kimball - Salt Lake City UT, US

Assignee:

AbViser Medical LLC - Salt Lake City UT

International Classification:

A61B 5/00

US Classification:

600561

Abstract:

An improved apparatus for monitoring the intra-abdominal pressure of a hospitalized patient includes a urinary catheter connected to a urine valve having selectable communication positions between a discharge end of the urinary catheter and either a drain or a fluid source. Preferably, the urine valve has a housing adapted to resist patient discomfort from leg-valve contact. One operable protective housing may be embodied as a separate tray component. Plumbing structure desirably maintains fluid supply and drain conduits in a substantially parallel arrangement to assist routing those conduits between a patient's legs. When the urine valve is oriented for communication to the fluid source, an infusion pump may be used to introduce a known quantity of fluid through the urine valve and into the patient's bladder where the fluid's pressure can be measured. Desirably, a double check valve is included in a fluid supply path and arranged to permit repetitive operation of a syringe to inject a bolus of fluid into the patient's bladder. Subsequent to making a pressure measurement, the urine valve is returned to the bladder draining position.