Apparatus for ascertaining blood characteristics and probe for use therewith
First Claim
1. An apparatus for use with a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a display module and a probe having a distal extremity adapted to be inserted into the vessel of the patient and having a proximal extremity coupled to the display module, the probe including a gas sensor assembly mounted in the distal extremity for providing an electrical signal to the display module when the probe is disposed in the blood, the probe having an antithrombogenic surface treatment for inhibiting the adhesion of blood components to the probe when disposed in the blood.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for use with a patient having a vessel carrying blood to ascertain characteristics of the blood. The apparatus includes a display module and a probe having a distal extremity adapted to be inserted into the vessel of the patient and having a proximal extremity coupled to the display module. The probe includes a sensor in the distal extremity for providing an electrical signal to the display module when the probe is disposed in the blood. The probe can have an antithrombogenic surface treatment for inhibiting the adhesion of blood components to the probe when disposed in the blood.
-
Citations
55 Claims
- 1. An apparatus for use with a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a display module and a probe having a distal extremity adapted to be inserted into the vessel of the patient and having a proximal extremity coupled to the display module, the probe including a gas sensor assembly mounted in the distal extremity for providing an electrical signal to the display module when the probe is disposed in the blood, the probe having an antithrombogenic surface treatment for inhibiting the adhesion of blood components to the probe when disposed in the blood.
- 7. A probe for use in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula adapted to be inserted into the vessel of the patient and a gas sensor assembly mounted inside the cannula, the cannula having an antithrombogenic surface treatment for inhibiting the adhesion of blood components to the cannula when disposed in the blood.
- 15. A probe for use in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula having proximal and distal extremities, the distal extremity being adapted to be inserted into the vessel of the patient, a gas sensor assembly mounted inside the distal extremity of the cannula, the cannula having an annular window of a gas permeable material extending around the gas sensor assembly.
- 18. A probe for use in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula having proximal and distal extremities, the distal extremity being adapted to be inserted into the vessel of the patient, an electrolyte solution disposed in the cannula, a gas sensor assembly mounted in the distal extremity of the cannula and including an electrode disposed in the electrolyte solution, a conductor extending to the electrode and a sealing glass extending around the conductor, the conductor having a coefficient of thermal expansion and the sealing glass having a coefficient of thermal expansion approximating the coefficient of thermal expansion of the conductor for inhibiting separation of the conductor from the sealing glass and thus inhibiting the electrolyte solution from creeping between the conductor and the sealing glass.
- 22. An apparatus for use with a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a display module and a probe, the probe having proximal and distal extremities, the distal extremity of the probe being adapted to be inserted into the vessel of the patient and having a gas sensor assembly for providing an electrical signal when the probe is disposed in the blood, the display module having a first connector, the proximal extremity of the probe having a second connector for mating with the first connector, the second connector having a cylindrical portion and an electrical contact extending around at least a portion of the cylindrical portion, a conductor extending though the probe for electrically coupling the gas sensor assembly with the electrical contact, the electrical contact being seated flush with the cylindrical portion so as to provide the second connector with a substantially smooth cylindrical surface, the first and second connectors permitting connection and disconnection between the probe and the display module.
- 25. A probe for use with an introducer in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula having proximal and distal extremities, the distal extremity of the cannula being adapted to be inserted into the vessel of the patient, a gas sensor assembly disposed in the distal extremity of the cannula for providing an electrical signal when the cannula is disposed in the blood and a connector provided on the proximal extremity of the cannula whereby the distal extremity of the cannula is adapted for slidable travel through the introducer when inserting the cannula into the vessel, the cannula and connector having a size which permits the introducer to be slid off of the proximal extremity of the cannula and the connector after the distal extremity of the cannula has been inserted into the vessel.
- 30. An apparatus for use with a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a compact display module and a probe, the probe having a proximal extremity coupled to the display module and a distal extremity adapted to be inserted into the vessel of the patient, the distal extremity including a sensor for providing an electrical signal to the display module when the probe is disposed in the blood, the probe having calibration coefficients, the display module having a processor for processing the electrical signal to provide a reading and a memory for storing the calibration coefficients, the processor being coupled to the memory to permit access by the processor to the calibration coefficients in connection with the processing of the electrical signal so as to enhance the accuracy of the reading.
- 36. A kit for use with a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a package, a probe carried within the package and having a distal extremity adapted to be inserted into the vessel of the patient and including a sensor for providing an electrical signal, the probe having calibration coefficients, a compact display module carried within the package and having a processor and a nonvolatile memory coupled to the processor, the calibration coefficients being stored in the memory of the display module whereby when the probe is coupled to the display module and the distal extremity inserted into the vessel and an electrical signal is received by the display module for providing a reading the processor accesses the memory so as to utilize the calibration coefficients and thus enhance the accuracy of the reading.
- 39. A probe for use in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula adapted to be inserted into the vessel of the patient and having proximal and distal extremities, an electrolyte solution disposed in the distal extremity of the cannula, a gas sensor assembly mounted in the distal extremity of the cannula and disposed in the electrolyte solution, the gas sensor assembly having a tube with a distal portion and a first electrode coiled around the tube and a second electrode carried by the distal portion of the tube, first and second conductors extending from the proximal extremity of the cannula to the gas sensor assembly, the first conductor being coupled to the first electrode and the second conductor extending through the tube and being coupled to the second electrode whereby the tube serves as support for the first electrode and as a conduit for the second conductor.
- 45. A probe for use in a patient having a vessel carrying blood to ascertain characteristics of the blood comprising a cannula having proximal and distal extremities, the distal extremity being adapted to be inserted into the vessel of the patient, a flex circuit extending through at least a portion of the cannula, the flex circuit having proximal and distal portions with first and second electrodes formed on the distal portion and first and second conductors extending from the proximal portion to the first and second electrodes, an electrolyte solution disposed in the distal extremity of the cannula in the vicinity of the first and second electrodes.
Specification