Pacer Detect
Serbian translation: opcija detekcije signala pejsmejkera
| GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||
|---|---|---|---|---|
|
| 01:00 Nov 15, 2008 |
| English to Serbian translations [PRO] Medical - Medical: Instruments | |||||||
|---|---|---|---|---|---|---|---|
|
| ||||||
|  Selected response from: Natasa Djurovic Serbia Local time: 16:52 | ||||||
Grading comment
| |||||||
| Summary of answers provided | ||||
|---|---|---|---|---|
| 4 +1 | opcija detekcije signala pejsmejkera |
| ||
| 3 | detektovanje pejsmejkera |
|
Answers
8 hrs confidence: 
| pacer detect detektovanje pejsmejkera Explanation: Ovo nije ništa sigurno. Ovaj prevod sam sama skovala na osnovu nekih stvari koje sam čitala na internetu. Mislim da je "pejser" i "pejsmejker" jedno te isto. Naravno, kod prevođenja ovakvih stvari poželjno je ostaviti i original, jer se softver ne lokalizuje u većini slučajeva. When using Pacer Detect, the physician should be aware that false positive and false negative pacer detects may occur. False positives - may result from poor electrode hook-up or high noise conditions. |
| ||
Notes to answerer
| |||
| Login to enter a peer comment (or grade) | |||
8 hrs confidence: peer agreement (net): +1
peer agreement (net): +1| pacer detect opcija detekcije signala pejsmejkera Explanation: Posto je opcija disabled-znaci da je iskljucena. Na sledecoj adresi na 4. strani je objasnjenje: http://www.draeger.com/MT/internet/pdf/CareAreas/InfoMoni/mo... -------------------------------------------------- Note added at 8 hrs (2008-11-15 09:25:59 GMT) -------------------------------------------------- Detekcije ili otkrivanja signala. -------------------------------------------------- Note added at 8 hrs (2008-11-15 09:36:57 GMT) -------------------------------------------------- Introduction Monitoring ECG in patients with pacemakers presents a challenge to manufacturers of patient monitors. Misinterpreting a pacer pulse as a QRS complex can have dire consequences for the patient. Conversely, unusual circumstances or a pacer that is incorrectly set can result in repeated false alarms – which is annoying to both patients and staff and can cause the clinician to become desensitized to the monitor. Background The indications to pace a patient are varied. Simply put, pacemakers are used with patients who have trouble with the natural pacemaker and/or electrical conduction cells in their heart. There are many different types of pacemakers, and they have different pulse characteristics, with different rise times and recharge characteristics. For pacemakers that can be implanted in the body, there are single-chamber pacemakers, dualchamber pacemakers, rate-responsive pacemakers, and demand pacemakers. The variety of chambers paced, chambers sensed, and pacemaker sensing functions lead to different pulse characteristics, with different rise times and recharge characteristics. In spite of the best technology, all these factors can make it difficult to consistently differentiate pacemaker pulses from QRS complexes. Dräger Medical’s pacer algorithm is exceptionally well-tuned to accommodate for the majority of pacemakers. As with all ECG applications, good skin preparation and correct electrode and lead placement will help achieve maximum results in monitoring paced patients. Emergency Care · OR/Anesthesia · Critical Care · Perinatal Care · Home Care Because you care Pacer Detection Published: July 2004 T E C H N I C A L A B S T R A C T Abstract: Dräger Medical has developed a patented pacer detection algorithm that balances a cautious approach to avoid false positive1 alarms with techniques to minimize false negative2 ECG alarms. This paper discusses various aspects of pacer detection during ECG monitoring. Introduction 1 Background 1 Understanding pacer pulse characteristics 2 Pacer signal detection 4 Pacing during asystole 4 False low heart rate of asystole calls 5 Minimizing false alarms 5 Conclusion 7 2 Understanding Pacer Pulse Characteristics Pacer pulses versus QRS complexes Differentiating pacer pulses from QRS complexes is done by selective filtering, whereby each signal is classified according to its unique characteristics. The frequency band in which the heart’s electrical signal typically falls is between 0.05 to 150 Hz. By contrast, the pacemaker signal frequency range is much higher, due to a much narrower pulse width of 0.2 to 2ms. Also, the amplitude of a unipolar pacer spike is usually much higher than a natural R-wave spike generated by the heart. Pacer pulse definition In general the characteristics of a pacemaker pulse, which the monitor recognizes, are defined as: Amplitude (ap) ±2 to ±700 mV; Width (dp) 0.2 to 2.0 ms; Rise / Fall times (min.) 0.1 dp, 100 ms; Overshoot 0.025 ap, apdp/to; and recharge time (to) constant 4 to 100 ms. This means the amplitude of the pulse that is measured on the body surface through the electrodes must be at least 2 mV amplitude with 0.2 ms width. However, a large number of factors play a role in the presentation of the pacemaker stimulus on the body-surface ECG. The electrode configuration of the pacing system (unipolar or bipolar), the charge generated by the pacemaker pulse (amplitude and width), the location of the anodal and cathodal electrode, pacer location, the recorded ECG lead, and lead impedance all determine the ECG presentation of the pacemaker stimulus. These factors result in a widely varied amplitude and width of the pacemaker pulse that is picked up at the body surface. More recent developments in pacemaker technology have resulted in greater use of lower pulse width (0.03ms) and lower pulse amplitudes (0.25 mV),3 which fall outside the pacer detection sensitivity range. If the algorithm sensitivity of the Dräger Medical pacer detection were increased, greater artifact inaccuracies would result on T E C H N I C A L A B S T R A C T Figure 2 Pacemaker pulse parameters 1mV Pacer spike 5-700mV ap ao dp to Figure 1 Heart response to the pacemaker stimulus 3 T E C H N I C A L A B S T R A C T the ECG. Dräger Medical does not claim that ECG patient monitoring systems can be a substitute for adequate pacemaker diagnostics. Unipolar versus bipolar pacemakers When monitoring patients with pacemakers, it is important to know whether the pacemaker is unipolar or bipolar. In a unipolar pacemaker, the distal tip of the pacing lead serves as the negative pole and the pulse generator casing is the positive pole. As a result of this wide circuit, the unipolar pacemaker signal varies between 2 to 100 mV and generates a large pacemaker artifact on the ECG. In bipolar pacemakers, both poles are in the pacing lead – resulting in a small circuit and low signal voltage. Thus, bipolar pacemakers are more difficult for physiologic monitors to detect than are unipolar pacemakers because of the lower voltage signal. The bipolar signal could be less than 2mV or even 0.2mV in amplitude with a negligible overshoot for surface ECG electrodes to sense and transmit to the monitor. Because the unipolar system requires the pulse to travel back to the pulse generator, the voltage signal is larger (varying between 2 to 100 mV) with a larger overshoot and tail. It is therefore easier to detect using body-surface ECG electrodes. 1mV Pacer spike Pacer repolarization curve Figure 3 Pacemaker signal 4 Pacer Signal Detection When monitoring a patient with a pacemaker, the “Pacemaker Detection” feature must be turned on to increase sensitivity of the algorithm’s pacemaker pulse detector and to reduce recording electrical artifact. The presence of pacer signals is detected by the ECG processing front-end, immediately after power line filtering. Pacer signals are blanked and therefore not shown on the monitor. However, a pacer mark is displayed on the monitor to signify when the artificial pacemaker is delivering current where the front-end detects an actual pacer spike. The pacer detection sensitivity is set to >1mV for a typical 1 ms pacer spike. This setting is carefully chosen to avoid false triggering from erroneous or spurious signals induced by 50 or 60 Hz noise from such items as heating blankets, infusion pumps, etc. Opcija copiranja nece pa sam kopirala deo teksta jer vidim da ne prima ni Internet adresu! |
| |
| Login to enter a peer comment (or grade) | ||
Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
KudoZ™ translation help
The KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.
See also:
Search millions of term translations