39 results about "Arterial pH" patented technology

The present invention relates to a blood analyte measurement system for the procurement of blood samples for measurement of blood properties such as analyte concentration or analyte presence. A blood access system can be coupled with a measurement system such as an electrochemical sensor, and can also be used with other measurement modalities. Embodiments of the present invention can facilitate accurate measurement of blood glucose by the clinician in a sterile manner. Embodiments of the present invention can also enable the calibration of the sensor at one or more calibration points. One desired analyte of measurement is glucose for the effective implementation of glycemic control protocols. Embodiments of the present invention can also be used for the measurement of other analytes such as arterial blood gases, lactate, hemoglobin, potassium and urea. Additionally, embodiments of the present invention can function effectively on a variety of blood access points and specifically enables glucose monitoring in an existing arterial line that is already in place for hemodynamic monitoring. The present invention does not consume a significant amount of blood. Some embodiments of the present invention can re-infuse the blood into the patient, which can facilitate operation of the system in a sterile manner.

Disclosed herein are exemplary embodiments of an impulse therapy garment for use in pump therapy for enhancing venous and arterial blood flow. The garment may be advantageously fitted to a human foot, and may include a rotationally positionable heel-strap, an air inlet connector, separate dorsum straps, or other features. For example, other garments may include a washer having a center hole locatable around the stem and configured to be forcibly retained against the outer surface of the fabric by snap-fit using annular stem protrusions extending from an external surface of the stem. In further embodiments, a garment may include a bladder retention fastener configured to retain an end of the bladder to the fabric to allow substantially differential movement between the fabric and non-retained portions of the bladder during inflation and deflation of the bladder.

A system and method for monitoring the arterial gas concentrations of a patient receiving percutaneous oxygenator support. The system comprises a percutaneous oxygenator for providing medical gases to the venous system of the patient via a catheter. Gases are also removed from the venous system via a catheter. The concentrations and flow rates of the gases provided and removed from the patient are monitored. A CPU analyzes the concentration and flow rate information to compute the arterial gas concentration of the patient.

A system for controlling an amount of at least one gas X in a subject's lung to target at least one end tidal partial pressure of at least one gas X (PetXT) uses a control system for controlling the gas delivery device, wherein the control system implements a sequential gas delivery system and a feedback algorithm which compares a PetXT for a respective breath of variable size and preferably a respective current PetX value measured by a measurement system, to obtain an error signal, the feedback algorithm adapted for generating a control signal based on the error signal, the control signal determining the amount of gas X to be inspired by the subject in at least a first portion of a respective ensuing respective inspiratory cycle to target PetXT for the respective interval.

A breathing circuit for use in conjunction with a ventilator serving a mechanically-ventilated patient includes an expiratory gas airflow pathway; an inspiratory gas airflow pathway; and a gas mixing mechanism operable to mix inspiratory gas and expiratory gas in an amount sufficient to equilibrate the patient's PETCO2 and arterial PCO2 such that the patient's PETCO2 is a clinically reliable approximation of the patient's PaCO2.

An apparatus and method for controlling the end tidal partial pressure of a gas X in a subject's lung, and to the use of such an apparatus and method for research, diagnostic and therapeutic purposes, wherein the method consists of: obtaining input of a series of logistically attainable PetX values for a series of respective breaths: determining an amount of gas X required to be inspired by the subject in an inspired gas to target the PetX for each of said respective breaths: and controlling a gas delivery device to deliver the amount of gas in a volume of gas delivered to the subject in each of said respective breaths to target the respective PetX for that breath.

System and methods are provided to perform non-invasive, real-time, continuous molecular detection and quantification of molecular species in a sample or animal subject using Raman spectroscopy. Such systems and methods may be applied to identify and quantify molecular species found in the body, which may be useful for prenatal diagnosis, detecting deep skin infections, performing cerebral spinal fluid assessment, measuring arterial blood gases, blood glucose, cardiac biomarkers, creatinine flow rates. The non-invasive, quantification of such molecular species continuously in real time enables a significantly more attractive course of therapy than existing protocols.

The invention discloses a blood gas acid-base analysis method, which comprises acquiring blood gas parameters of arterial blood; and substituting the blood gas parameters sequentially into a preset simple acid-base imbalance judgment condition, a dual acid-base imbalance judgment condition and a triple acid-base imbalance judgment condition, judging whether an acid-base imbalance condition exists,and outputting the judgment result. This method is used to determine the acid-base imbalance and, on the basis of a calculation formula of a body compensation prediction value, the relevant arterialblood gas value and serum electrolyte detection data are obtained, the judgment of the acid-base balance can be more accurate than that by a manual method and takes less time in the prior art, and theaccuracy rate of the clinician's judgment on the type of acid-base imbalance of a patient and the success rate of the rescue of critically ill patients can be greatly improved. The method of the invention can quickly and accurately judge the results to win the rescue time for the patient against time and, at the same time, greatly improves the work efficiency of the clinician, which is conduciveto early formulation of a diagnosis and treatment plan.

The invention discloses an arterial blood gas collector special for a child, and relates to the technical field of medical instruments. The gas collector solves the problem that the child is active and uncooperative in the arterial blood collecting process, the holding puncture may break the artery easily and leads to puncture failure, even forming local hematoma. The arterial blood gas collectorincludes a syringe, an extension hose and a needle body. The needle body portion is provided with a needle wing convenient to operate and flexible to move, and an anticoagulant is stored in the syringe. One end of the extension hose is fixedly connected with the needle body, and the other end is provided with a connector connected to a syringe port in the insertion mode. The gas collector has theadvantage that a medical worker can conveniently collect the arterial blood of the child, enhance the success rate of the arterial blood collection of the child, and reduce the pains suffered by the child during the blood collection process.

A method and system for the analysis of a patient's oximetry data to detect sleep-disordered breathing is provided. The system employs an algorithm to reliably detect patient arousals and correlate those with accelerated heart rate and oxygen saturation levels in a manner that detects sleep-disordered breathing via the respiratory mask. Initially a timing channel is formed based on a plethsmography signal using an optical finger sensor. Based on the pleth waveform, a respiratory wave form is prepared that represents respiration rate. An arousal mask is applied to the signal based on attenuations in the pleth signal. Once arousals are identified the time required for changes to propagate from the lungs to the blood gas is subtracted from the onset time of the arousal. As a result if the timing agrees with dropping oxygen saturation or falling arterial pH then the arousal is indicated as a chemoreflex related arousal.

The invention belongs to the technical field of medical devices and specifically discloses a novel arterial blood gas needle. The novel arterial blood gas needle of the present invention comprises a needle barrel, a needle seat integrally connected with the needle barrel, and a needle head detachably connected with the needle seat. The needle barrel has a piston inside; A baffle, the diameter of the circular baffle matches the radially inner section of the needle base, and a knob is arranged on it, and the knob is rotatably connected to the needle base, and from where the circular baffle is located, extending to the outside of the needle seat. The novel arterial blood gas needle is not only simple in structure and easy to operate, but also can effectively avoid contact between blood samples and air, thereby effectively improving the accuracy of arterial blood gas analysis.

A fluid collection assembly (10) and method for use thereof is provided including a fluid collection cartridge (20) having a tubular member (21) with a plunger assembly slidably inserted. The plunger assembly includes a stopper (32) and a plunger rod (31). The stopper and plunger rod are removably interlocked together which enables the plunger rod to exert a force in a distal direction on the stopper and to be removed from the stopper upon the application of a proximal force thereto. The fluid collection assembly is particular useful in the collection of arterial blood. In use, the assembly is primed with a liquid anticoagulant, the plunger rod is removed, and a blood sample is collected with the arterial pressure causing the stopper to travel in a proximal direction along the cartridge.

A breathing circuit for use in conjunction with a ventilator serving a mechanically-ventilated patient includes an expiratory gas airflow pathway; an inspiratory gas airflow pathway; and a gas mixing mechanism operable to mix inspiratory gas and expiratory gas in an amount sufficient to equilibrate the patient's PETCO2 and arterial PCO2 such that the patient's PETCO2 is a clinically reliable approximation of the patient's PaCO2.

A fluid collection assembly and method for use thereof is provided including a barrel with a plunger rod slidably inserted is disclosed. The assembly and method are particularly useful in the collection of arterial blood. The plunger rod includes a proximal portion, a distal portion with a stopper, and a breakable connector between the proximal and distal portions. In use, the assembly is primed with a liquid anticoagulant, the breakable connection is broken, and a fluid sample is collected with the arterial pressure causing the distal portion of the plunger rod to travel in a proximal direction along the barrel and contact an annular flange extending within the barrel. After collection, a tip cap can be applied to the assembly to prevent any spillage of the fluid sample during handling, storage, and transportation.

The invention relates to the technical field of arterial puncture, and specifically relates to a disposable arterial blood gas puncture patch. The puncture patch can display correct arteriovenous puncture points and is convenient for medical staff to blindly collect arterial blood gas, so that the peripheral blood vessels and nerves of patients can be prevented from being stabbed by mistake. The medical staff can remove a non-toxic sealed protective film, tightly attach a silicone skin patch to the skin of a patient and wind four secondary fixation binding bands on the body of the patient to fix with four fixing velcro tapes; sterilized strip cotton disinfects the surface of the skin in a blood gas puncture strip hole; and two color-changing induction coatings perform induction change through the skin surface temperature and arterial blood vessel temperature of the patient, and as the skin surface temperature is relatively lower than the arterial blood vessel temperature, the color-changing induction coating located at the upper part of the arterial blood vessel can become colorless and the color-changing induction coating located at the upper part of skin surface can turn red, sothat the medical staff can find the accurate position of the arterial blood vessel in the blood gas puncture strip hole by comparing the two color-changing induction coatings.

A method for assessing the arterial blood flow-mediated vasodilatation function by an air bag arm band comprises the following steps of providing a processing unit; taking a digital air bag arm band device, an air bag arm band, a pressure sensor and a flow sensor being arranged in the device which is provided with a sphygmomanometer function; measuring the state of the brachial artery before the blood clotting by the digital airbag arm band device, and obtaining a first vibration wave from the pressure sensor sent to the processing unit; and using the digital air bag arm band device to perform blood clotting, measuring a brachial artery condition by the digital air bag arm band device, and obtaining and sending a second vibration wave to the processing unit by the pressure sensor; and converting the first vibration wave and the second vibration wave into a first arterial volume change amount wave and a second artery volume change amount wave through a transfer function constructed by the pressure sensor and a flow sensor, and comparing each parts of the two volumetric waves, and outputting the specific value of the difference.

An arterial blood gas needle relates to the medical instrument field, and comprises a syringe, a needle stand, a pull bar and a piston; the syringe is fixedly connected with the needle stand; the piston is fixedly connected with the end portion of the pull bar; the pull bar and the piston are movably sleeved in the syringe; the needle stand is provided with a through hole connected with the syringe; a sleeve rod is movably sleeved in the piston, and arranged in opposite with the through hole; the sleeve rod extends to one end in the syringe and is fixedly connected with a block; the cross section area of the block is bigger than that of the through hole, thus blocking the through hole; the pull bar is hollow; the other end of the sleeve rod extends outside the pull ar. The arterial blood gas needle can effectively isolate air so as to ensure the collected blood sample quality, thus effectively realizing blood anticoagulant purpose.

The invention relates to the technical field of medical instruments, in particular to a special hand guard closing and clamping mechanism for an arterial blood gas needle. The mechanism consists of main clamping cylinders, fixed grooves, connecting wires, fastening cylinders, inserting strips, non-return rings, a needle tip groove, needle tip clamps, a protective plate, a needle stem groove, transition grooves, a pintle groove, a buckle and a connecting sheet. Each main clamping cylinder is of a columnar structure with a semicircular cross section, the needle tip clamps are of a semi-circular-truncated-cone-shaped structure, the vertical flat wall of the needle tip clamp is provided with the vertical needle tip groove, and the middles of the two main clamping cylinders are located in semi-cylindrical spaces of the two fastening cylinders which are connected with each other respectively at the same time. When each fastening cylinder sleeves the needle tip clamps, the needle tips are sealed by the needle tip clamps under the extrusion of the inner walls of the fastening cylinders.

The invention discloses a non-intubation general anesthesia pulmonary lobectomy system based on robot assistance, and particularly relates to the technical field of operation anesthesia. The non-intubation general anesthesia pulmonary lobectomy system comprises a human body, a nerve block set or an epidural puncture bag, and a laryngeal mask; and the human body is connected with an ultrasonic instrument used for guiding lower thoracic paravertebral nerve block or thoracic epidural block, a BIS monitor used for monitoring the sedation depth of a patient, an invasive arterial monitor used for monitoring arterial blood gas of the patient, and a conventional monitor used for monitoring vital signs of the patient. Through thoracic paravertebral nerve block or epidural block, good unilateral orbilateral analgesia can be provided, sympathetic nerve tension is lowered, the dosage of general anesthetics, especially opioids is decreased, complications of trachea intubation general anesthesia ofthe patient of pulmonary lobectomy under assistance of a Da Vinci robot are reduced, the patient can fall asleep through general anesthesia, trachea intubation is replaced with the laryngeal mask, the postoperation satisfaction of the patient with general anesthesia is better, and postoperative rehabilitation of the patient of the chest department is promoted.

Disclosed herein are exemplary embodiments of an impulse therapy garment for use in pump therapy for enhancing venous and arterial blood flow. The garment may be advantageously fitted to a human foot, and may include a rotationally positionable heel-strap, an air inlet connector, separate dorsum straps, or other features. For example, other garments may include a washer having a center hole locatable around the stem and configured to be forcibly retained against the outer surface of the fabric by snap-fit using annular stem protrusions extending from an external surface of the stem. In further embodiments, a garment may include a bladder retention fastener configured to retain an end of the bladder to the fabric to allow substantially differential movement between the fabric and non-retained portions of the bladder during inflation and deflation of the bladder.

The invention discloses a diagnosis and early warning device suitable for heart failure. The device comprises a detection instrument; an input port of the detection instrument is fixedly connected with an input end I, an input end II and an input end III; and an output port of the detection instrument is fixedly connected with one end of the output end I, one end of the output end II and one end of the output end III. According to the diagnosis and early warning device suitable for heart failure and the early warning method of the diagnosis and early warning device, a patient can visually andclearly display the illness condition of the patient, the convenience of heart failure diagnosis is greatly improved, the user can know the illness condition degree of himself / herself by observing which indicator lamp is turned on, and an excellent early warning effect is achieved; the detection instrument comprises an arterial blood gas analyzer, an ultrasonic cardiogram instrument and an electrocardiograph, a patient can be detected at the same time from multiple aspects on the whole, the detection efficiency is improved, meanwhile, the accuracy of subsequent judgment is improved, the misdiagnosis rate of heart failure diagnosis is greatly reduced, and the use is convenient.

The invention relates to an arterial blood gas collection device for preventing iatrogenic injury, which comprises a sleeve, an inner cylinder, a needle cylinder piston, a piston push rod, a needle head, a sealing device and a needle sleeve, the needle head comprises a first tip and a second tip, and a needle head lug boss is arranged on the outer peripheral surface of the side wall of the needle head; a first spring is arranged between the end face of the inner cylinder and the second fixing support. A second spring is arranged between the needle sleeve and the second fixing bracket; the needle cylinder piston is arranged in the inner cylinder; the inner cylinder is arranged in the sleeve; the needle cylinder piston is made of a material capable of permeating air, the material of the needle cylinder piston is self-sealing porous polyethylene, and partially saponified polyvinyl alcohol, polyacrylate, acrylic acid-vinyl ester, polyethylene oxide and / or cellulose polymer are mixed in the self-sealing porous polyethylene; the porosity of the self-sealing porous polyethylene ranges from 15% to 40%; the average pore size ranges from 5 [mu] m to 20 [mu] m.

A system for facilitating arterial blood gas (ABG) sampling. The system includes a main part, a first plurality of pulse sensors attached in a row on an inner surface of the main part, a first plurality of lights attached in a row on an external surface of the main part, a first opening on the main part adjacent to the first plurality of pulse sensors, and a processor. The processor is configured to receive a first plurality of radial pulse intensities from the first plurality of pulse sensors, determine a highest radial pulse intensity among the first plurality of radial pulse intensities, and turn on a light from the first plurality of lights associated with the highest pulse intensity among the first plurality of radial pulse intensities.