摘要:
Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.
摘要:
A low power recording devices permits various flexible power options, including a no-battery option in which the recording device satisfies its entire power requirements from the telephone wall socket and from the RS-232 socket of a computer, and a no-battery option in which the recording device satisfies its entire power requirements from the power source for the mobile telephone. Neither no-battery option exerts a significant additional load on the power source. Voice signals are digitized and stored in low power non-volatile memory. Facsimile signals either are digitized and stored in low power non-volatile memory, or are decoded and stored in low power non-volatile memory. An audio recording and playback capability through an integrated speaker-microphone pair is provided.
摘要:
An improved sensor apparatus of a kind that positions a semi-permeable membrane adjacent to an electrode assembly, for measuring a predetermined parameter, e.g., glucose concentration, of an adjacent fluid sample. A special compressible ring serves a first function of tensioning the membrane so that it is maintained in intimate contact with the electrode assembly, and it further serves a second function of sealing the fluid sample from the external environment.
摘要:
A computer system includes a computing device such as a microcontroller and a memory device. The memory device is illustratively a serial device connected to the serial port of the microcontroller. The memory device includes a page latch load circuit which provides serial I/O to the microcontroller and transfers I/O bits in a predetermined order to/from the page latches. Page latches are connected over many bit lines to a memory cell array. The page latches not only supports programming and reading of sectors in the memory cell array, but also provides one or more of the following functions: directly accessible to the microcontroller as an SRAM scratch pad, directly loadable from the memory cell array to facilitate single byte "read-modify-write" operations, and loadable during programming operations to support real time applications.
摘要:
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO.sub.2, especially in combination infusion fluid delivery/blood chemistry analysis systems which include a sensor assembly with each of the assembly electrodes mounted in an electrode cavity in the assembly. The analysis system used in the practice of the present invention typically includes provision for delivering infusion fluid and measuring blood chemistry during reinfusion of the physiological fluid at approximately the same flow rates. The invention calibration solutions are useful for calibrating an array of sensors capable of simultaneously measuring a number of blood chemistry parameters, including the partial pressures (tensions) of carbon dioxide and oxygen, pH (hydrogen ion), sodium, potassium, ionized calcium, ionized magnesium, chloride, glucose, lactate and hematocrit, in body fluids. More particularly, this invention relates to the use of an infusible intravenous solution to facilitate calibration on a regular basis for every individual sensor in a sensor assembly, which is in constant fluid communication with the body regardless of whether the sensors are ex vivo or in vivo.
摘要:
Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.
摘要:
An improved apparatus is disclosed for maintaining a medical assembly, e.g., a blood chemistry electrode assembly, filled with a bubble-free storage liquid for an extended storage time period. The apparatus achieves this result by connecting to the assembly a pressurized reservoir that supplies additional storage liquid, to replenish any storage liquid lost due to diffusion from the medical assembly.
摘要:
An improved system is disclosed for monitoring a patient's blood chemistry, wherein the system intermittently draws blood samples from the patient into a special sensor assembly having a plurality of analytical sensors, each sensitive to a particular parameter of the blood. After signals produced by these various sensors have been read, the system reinfuses the blood samples back into the patient. Withdrawal of the successive samples to a desired, optimal position within the sensor assembly is achieved by monitoring signals produced by one or more of the analytical sensors, themselves. This allows a catheter that connects the sensor assembly to the patient to have a variable length and internal volume and obviates the need for a separate, dedicated sensor for detecting the arrival of the blood sample at the desired position.
摘要:
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO.sub.2, and optionally, for concurrent analysis of O.sub.2, especially in combination infusion fluid delivery/blood chemistry analysis systems which include a sensor assembly with each of the assembly electrodes mounted in an electrode cavity in the assembly. The analysis system used in the practice of the present invention typically includes provision for delivering infusion fluid and measuring blood chemistry during reinfusion of the physiological fluid at approximately the same flow rates. The invention calibration solutions are useful for calibrating an array of sensors capable of simultaneously measuring a number of blood chemistry parameters, including the partial pressures (tensions) of carbon dioxide and oxygen, pH (hydrogen ion), sodium, potassium, ionized calcium, ionized magnesium, chloride, glucose, lactate and hematocrit, in body fluids. More particularly, this invention relates to the use of an infusible intravenous solution to facilitate calibration on a regular basis for every individual sensor in a sensor assembly, which is in constant fluid communication with the body regardless of whether the sensors are ex vivo or in vivo.
摘要:
A modular system uses point-to-point communication between field-programmable gate arrays (FPGAs) on a control module and each port module, respectively, to manage basic module functions, such as power, environmental monitoring, and health checks on the modules and their components. This allows a chassis to be managed without fully powering each card first, frees processors on the modules from having to perform health checks, allows dedicated resources to rapidly monitor the health of each card, and prevents one bad card from disabling management of all cards.