Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
INFLUENCE OF PULSE OXIMETER SETTINGS ON THE FREQUENCY OF ALARMS AND DETECTION OF HYPOXEMIA - THEORETICAL EFFECTS OF ARTIFACT REJECTION, ALARM DELAY, AVERAGING, MEDIAN FILTERING OR A LOWER SETTING OF THE ALARM LIMIT
Autore:
RHEINECKLEYSSIUS AT; KALKMAN CJ;
Indirizzi:
TWENTEBORG ZIEKENHUIS,POB 7600 NL-7600 AZ ALMELO NETHERLANDS UNIV AMSTERDAM,CTR MED,DEPT ANESTHESIOL AMSTERDAM NETHERLANDS
Titolo Testata:
JOURNAL OF CLINICAL MONITORING AND COMPUTING
fascicolo: 3, volume: 14, anno: 1998,
pagine: 151 - 156
SICI:
1387-1307(1998)14:3<151:IOPOSO>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTENSIVE-CARE UNIT; RANDOMIZED EVALUATION; FALSE ALARMS; ANESTHESIA; MOTION; EVENTS;
Keywords:
ALARMS; ARTIFACTS; HYPOXEMIA; MONITORING; PULSE OXIMETRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
A.T. Rheineckleyssius e C.J. Kalkman, "INFLUENCE OF PULSE OXIMETER SETTINGS ON THE FREQUENCY OF ALARMS AND DETECTION OF HYPOXEMIA - THEORETICAL EFFECTS OF ARTIFACT REJECTION, ALARM DELAY, AVERAGING, MEDIAN FILTERING OR A LOWER SETTING OF THE ALARM LIMIT", JOURNAL OF CLINICAL MONITORING AND COMPUTING, 14(3), 1998, pp. 151-156

Abstract

Objective. The potential benefit of a reduced frequency of false pulse oximeter low oxyhemoglobin saturation (SpO(2)) alarms is that the attention of personnel is only directed to patients who experience hypoxemia. The present study was undertaken to better understand the effects of different settings of the pulse oximeter on false (artifact) and true (hypoxemia) alarms. Methods. Using the original SpO(2) data of 200 postoperative patients, we calculated off-line the effects of five methods (artifact rejection, alarm delay (2-44 s, 2 s increments), averaging (10-90 s), median filtering (10-90 s) and decreasing the alarm limit from 90% to 85%) on the number of (true- and false) alarms. Results. 830 episodes of hypoxemia (SpO(2) less than or equal to 90%) and 73 episodes of severe hypoxemia (SpO(2) less than or equal to 85%) occurred. With a SpO(2) alarm limit of 90%, the alarm was triggered 1535 times (830 true, 705 false). Artifact rejection reduced alarms by almost 50%. An alarm delay of 6 s or an averaging or median filtering epochof 10 s resulted in an alarm reduction of almost 50%. No differences were found in the reduction of alarms between averaging and median filtering. Changing the alarm limit to 85% reduced the number of alarms by 82%. A similar seduction of alarms was obtained with either an alarmdelay of 18 s or an averaging or median filtering epoch of 42 s. However, an alarm limit of 85% reduced the number of false alarms less than the other three algorithms (p < 0.01). Conclusions. The data from the present study suggest that in order to effectively suppress false alarms caused by pulse oximeter artifacts, it may be preferable to use alonger filtering epoch of approximately 40 s, rather than to decreasethe lower alarm limit.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 16:16:46