Parameters for routine setting
lead, filter, mode, voltage (1mv/cm), speed (25mm/s) are set reasonably according to the situation.
Alarm high and low limit +-20%
Common problems and treatment
There is waveform but no heart rate value display
Cause.
ECG waveform amplitude is less than 0.25mv
If the interference monitoring (filtering) is turned on when there is continuous interference, it may lead to no heart rate count, and if the interference monitoring is turned off, it may lead to less accurate heart rate count.
Treatment: Adjust the appropriate amplitude, select filtering, select monitoring mode or surgery mode
Heart rate value is higher than normal
Cause.
The interference count is turned off, interference is automatically detected, if interference occurs then the interference may be counted and the heart rate display appears abnormal
Solution.
Replace the main leads with low voltage, select leads with higher voltage for heart rate analysis, and re-identify
Avoid interfering factors as much as possible, and connect the ground wire if necessary
ECG waveform confusion
Fault phenomenon: large ECG waveform interference, the waveform is not standardized, not standard.
Inspection methods.
(1) Firstly, interference from the signal input should be excluded, such as patient movement, failure of the cardiac electrode pads, aging of the ECG lead wire and poor contact.
(2) Filter mode to "monitoring" or "surgery", the effect will be better, because the filter bandwidth in these two modes is wider.
(3) If the waveform effect is also bad under surgery, please check the zero ground voltage, generally required within 5V, can pull a separate ground wire to achieve the purpose of good grounding.
(4) If grounding also does not work, it may be interference from within the machine, such as poorly shielded ECG board and other reasons. At this point, you should try to replace the accessories.
Exclusion method: adjust the ECG amplitude to the appropriate value, the whole waveform can be observed.
ECG baseline drift
Fault phenomenon: ECG scan baseline can not be stabilized on the display, and sometimes drift out of the display area.
Inspection methods.
(1) whether the instrument using environment is humid, whether the instrument internal moisture.
(2) Check the quality of the electrode piece and whether the part of the human body contacting the electrode piece is cleaned.
Exclusion methods.
(1) Turn on the instrument continuously for 24 hours to drain the moisture itself.
(2) Replace the good electrode sheet and clean the part of human body contacting the electrode sheet.
Show a line on the wave screen
Reason: Whether the power cord or lead wire is malfunctioning, or the patient's heartbeat has stopped, or the electrode or probe has fallen off
Treatment.
Check whether the patient's condition has changed
Replace the electrode if the electrode is dislodged
Replace the power cord or lead wire if the cord is faulty
Precautions for ECG monitoring
1、Take out the ECG lead wire, align the convex side of the plug of the lead wire with the notch of the "ECG" jack on the front panel of the main unit and insert it.
2、The other end of the ECG lead wire with 5 electrode tips is connected to the body being measured
3、Be sure to connect the ground wire, which will play a very important role in the normal display of the waveform.
ECG false alarm
1、The upper and lower limits of each parameter alarm are not properly adjusted. The upper limit is set too low and the lower limit is set too high, which can cause frequent alarms.
2、In patients with acute myocardial infarction and hyperkalemia, the heart rate may be doubled due to the sensing line sensing both R and T waves.
3、Irregular heart rhythm is falsely reported due to external interference or muscle tremor.
4. In patients with pacemakers, the pacing heart rate is twice as high because the sensing line senses both the pacing signal and the R wave.
5. In the case of electrode allergy, false alarm due to artificial stimulation around the electrode and the appearance of ventricular fibrillation on the screen.
Cause and treatment
Observation of heart rate is obtained on the monitor by ECG (electrocardiogram) or PLETH (blood oxygen volume tracing wave). If the source of heart rate is PLETH and there is no heart rate, it may be that the oxygen probe is not connected or damaged, and the oxygen probe should be checked.
If the selected heart rate source is ECG and there is no heart rate, it may be caused by the ECG signal being too high or too low, difficult to observe and unable to display the correct heart rate, etc.
If the heart rate is within the heart rate alarm range of ECG monitoring and more than one alarm, then attention should be paid to whether the heart rate source is ECG or PLETH, and the heart rate alarm limit should be adjusted in a targeted manner.
1, If there is regular atrial activity, then the lead with good P-wave display should be selected.
2, QRS amplitude should be >0.5mV to be able to trigger heart rate counting.
3, ECG monitoring is only for monitoring heart rate and rhythm changes, if ST segment abnormalities need to be analyzed and ECG changes need to be observed in more detail, conventional lead ECG should be done.
4. Analyze whether the power cord is malfunctioning or the patient's heartbeat has stopped.
5 Observe if the electrode or probe is dislodged.
6、First observe the patient's condition, whether the rapid heart rate is related to rapid fluid rate, fever or general agitation; whether the slow heart rate is related to apnea or shallow breathing.
7、After eliminating the interference, you need to reset the upper and lower alarm limits as well as select the appropriate monitoring leads, and replace the electrode pads if you are allergic.
Blood pressure monitoring
1, the main function: it is divided into automatic monitoring, manual monitoring and alarm device. Manual monitoring is used at any time to start the START key; automatic monitoring can be timed, manually set the interval, the machine can automatically monitor according to the set time.
2, the use of blood pressure monitor should pay attention to the following: First, attention should be paid to each measurement should be drained of residual gas in the cuff, so as not to affect the measurement results. Second, choose a suitable cuff.
Precautions
The connection between blood pressure cuff and patient is different for adults, children and neonates, and different specifications of cuffs must be used, here is only an example for adults.
1, the cuff should be unfolded and wrapped around the patient's elbow joint 1 to 2 cm, the degree of elasticity should be able to insert 1 to 2 fingers is appropriate. Too loose may lead to high pressure measurement; too tight may lead to low pressure measurement, while making the patient uncomfortable and affecting the patient's arm blood pressure recovery. The catheter of the cuff should be placed at the brachial artery and the catheter should be on the extension line of the middle finger.
2, the arm should be kept flush with the person's heart, and the patient should be asked not to speak or move around when the blood pressure cuff is inflated.
3、When measuring the blood pressure, the position of the cuff on the arm should be kept flush with the heart, and the patient should not speak or move.
4、The arm should not be used to measure the temperature at the same time, it will affect the accuracy of the temperature value.
5、It should not be used for drip or malignant trauma, otherwise it will cause blood reflux or wound bleeding.
6、In general, the first manometry value is for reference only
