This is the gold standard of blood pressure measurement giving accurate beat-to-beat information. In general, systolic pressure will be slightly higher and diastolic pressure slightly lower (5¿¿10 mm Hg), than non-invasive measurements. It is useful when rapid changes in blood pressure are anticipated (due to cardiovascular instability, large fluid shifts or pharmacological effects) or when non-invasive blood pressure monitoring is not possible or likely to be inaccurate (obesity, arrhythmias such as atrial fibrillation, non-pulsatile blood flow during cardiopulmonary bypass). It is also used when long-term measurement in sick patients is required as it avoids the problem of repeated cuff inflation (causing localized tissue damage) and allows repetitive sampling for blood gases and laboratory analysis.
Continuous invasive BP monitors display the information both numerically and graphically. The basic principle is to provide a solid column of liquid connecting arterial blood to a pressure transducer (hydraulic coupling) and requires the following components:
Intra-arterial cannula;
Tubing (incorporating an infusion system)
Transducer
Microprocessor and display screen
Mechanism for zeroing and calibration.
Intra-Arterial Cannula.A short, parallel-sided cannula made of Teflon or polyurethane is inserted into an artery. Normally, a 20G cannula is used although 22G, and 25G are available for children and neonates. Preferably, a non-end artery, such as radial or dorsalis pedis is cannulated. Should thrombosis of the artery occur, arterial sufficiency is maintained via a collateral supply. The collateral supply to the hand can be assessed using Allen's test although this is not 100% reliable. If cannulation of those arteries is not possible, end arteries such as brachial or femoral may be used with due care to distal arterial sufficiency.
Product Details:
Minimum Order Quantity | 10 Piece |
Usage | Hospital, Clinic |
Material | PVC and ABS |
Output Impedance | Less 400 Ohms |
Input Impedance | 350 Ohms +/-10 percent |
Operating pressure range: | -50 ~ + 300 mmHg |
Barometric pressure: | 70~106Kpa |
Contact with the human body: | <168h |
Product Details:
Operating Pressure Range | +/-300 mmHg, 1 mmHg resolution |
Overpressure | 750 mmHg |
Transducer Simulator Sensitivity | 5 uV/V/mmHg, +/-1percent |
Excitation Voltage and Frequency | 2 to 10 VDC or VAC RMS, up to 5 kHz |
Output Impedance | Less than 400 Ohms |
Input Impedance | 350 Ohms +/-10percent |
Asymmetry | Less than 1 Percent |
Operating Temperature | 15degree Celcius to 40degree Celcius (60degree F to 105degree F) |
Storage Temperature | -20degree Celcius to 65degree Celcius (-5degree F to 150degree F) |
Operating Humidity | 80percent RH Max., Non-Condensing |
Accuracy | +/-1percent of reading or +/-1 mmHg, whichever is greater |
Repeatability and Hysteresis | +/-0.15percent full scale output |
Product Details:
Minimum Order Quantity | 1 Piece |
Usage | Hospital |
Packaging Type | Packet |
Operating Temperature | -18 ~ 60 Degree Celcius |
Channel | Single |
Transfer Voltage | 2-10 Volts DC |
Monitor End Connecter | Round 4 Pin |