fractional flow reserve derived from microcatheters versus standard pressure wires: a stenosis-level meta-analysis
To determine the protocol between sensors-
Micro-guide tube (MC)
And pressure line (PW)-
Export the reserve of fractional flow (FFR).
Comparison of Methods and Results of FFR obtained from MC (
Eden prairie acist Medical System, Navvus microtube system, FFRMC, Minnesota, USA)
With standard PW (FFRPW)
Identified, a yuan.
Numerical and classification consistency analysis was performed.
The drift of MC and PW systems and the relative level of equipment failure in each study were evaluated.
Six studies of 440 lesions (413 patients)were included.
The average overall deviation between FFRMC and FFRPW is-0. 029 (FFRMC lower).
For lesions with lower FFRPW, the deviation and variance are greater (p
Hydraulic universal testing machines have very high accuracy requirements.
The hydraulic system is the power drive mechanism of the tensile testing machine.
The specific application of the electronic universal testing machine in the automobile manufacturing process: The electronic universal testing machine needs to be used for automobile parts.
Wave soldering refers to the molten solder (lead-tin alloy), sprayed by electric pump or electromagnetic pump into the solder wave required by the design, can also be formed by injecting nitrogen into the solder pool, so that it is pre-loaded The printed board of the component realizes the soft soldering of the mechanical and electrical connection between the solder end or the pin of the component and the pad of the printed board through the solder wave.
The frequency converter is a power control equipment that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply.
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The calibration operation of the electronic universal testing machine is still relatively unfamiliar to friends who use it for the first time.
Selective wave soldering defects and their prevention.
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The tensile force is not an accurate value after being measured by the testing machine, and subsequent calculations are required to get the desired value.
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