Respironics 920 Instruction And Service Manual Download

Page: 51 / 52

English

Troubleshooting Guide (continued)

Symptom

Possible Cause

Possible Solution

Erratic

♥

display

and/or yellow
perfusion LED
during
concurrent use of
electrosurgical
equipment (ESU)

ESU may be
interfering with
oximeter performance

Examine the patient:

move oximeter,
cables, and sensor as
far away from ESU as
possible or refer to the
ESU operator's
manual

Perfusion is
blinking yellow
with each pulse

Perfusion signal at
sensor site is
marginal

Examine the patient:

reposition sensor or
select alternate sensor
site

Unable to obtain
green perfusion

Low patient pulse
strength

Reposition sensor on
patient

Sensor site poorly
perfused

Sensor not correctly
positioned

Sensor attached too
tightly or tape or other
items are restricting
perfusion at sensor
site

Reapply sensor, select
alternate sensor site,
or remove restrictive
material from sensor
site

Circulation reduced
due to excess
pressure between the
sensor and a hard
surface

Allow sensor and
finger to rest
comfortably on surface

Excessive ambient
light

Reduce ambient light

Excessive patient
motion

Reduce patient motion

Sensor applied to a
polished fingernail

Remove fingernail
polish

Interference from:

•

arterial

catheter

•

blood pressure

cuff

•

electrosurgical

procedure

•

infusion line

Reduce or eliminate
interference

Summary of Contents for 920

Page 1: ...English Instruction and Service Manual Models 920 and 920M Hand Held Pulse Oximeters ...

Page 2: ......

Page 3: ...e order of a physician Respironics Georgia 175 Chastain Meadows Court Kennesaw Georgia 30144 3724 USA Customer Service Telephone 1 800 345 6443 USA and Canada Customer Service Fax 1 800 886 0245 USA and Canada www respironics com Respironics Deutschland Gewerbestrasse 17 82211 Herrsching Germany Telephone 49 815 293 060 Fax 49 815 293 0618 Respironics Asia Pacific 3 F Microtron Building 38 Hung To...

Page 4: ...iv ...

Page 5: ...ettings 13 c Clock Settings 14 B Displays 15 1 SpO2 Display 15 2 Pulse Rate Display 15 3 Perfusion Indicator 15 4 Flashing Display 16 5 Dash in the SpO2 Display 16 C Printer Serial Output 17 D Memory Option 920M only 18 1 Recording Sessions 18 2 Memory Output Mode 19 VI Pulse Oximeter Sensors 21 A General Sensor Description 21 B Finger Clip Sensors 24 1 Adult Articulated Finger Clip Sensor 24 2 Pe...

Page 6: ...VII Sensor accessory reference 23 Figures Figure I Replacing batteries in the 920 6 Figure II Connecting sensors to the 920 7 Figure III Front view of the 920 8 Figure IV Rear view of the 920 8 Figure V Flowchart for setting the printer mode 12 Figure VI Flowchart for setting the calendar 13 Figure VII Flowchart for setting the clock 14 Figure VIII Adult Articulated Finger Clip Sensor 24 Figure IX...

Page 7: ...mbol ATTENTION Consult ACCOMPANYING DOCUMENTS Type BF Applied Part Patient isolation from electrical shock Canadian Standards Association UL Underwriters Laboratories CE Marking indicating conformance to EC directive No 93 42 EEC concerning medical devices ...

Page 8: ...viii ...

Page 9: ...nufactured to meet the calibration requirements for Respironics pulse oximeters Use of other manufacturer s sensors may cause improper pulse oximeter performance Check application site frequently to determine circulation positioning and skin sensitivity of the patient Each patient s sensitivity to Respironics sensors may vary depending on their medical status or the condition of their skin Use of ...

Page 10: ...on artifact of sufficient amplitude and regularity as good perfusion green The 920 is calibrated to determine the percentage of arterial oxygen saturation of functional hemoglobin Significant levels of dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin may affect the accuracy of the measurement Cardiogreen and other intravascular dyes depending on the concentration may affect the ...

Page 11: ...e packed with the 920 Hand Held Pulse Oximeter The 920 920M shipment includes Model 920 or 920M Hand Held Pulse Oximeter Instruction and Service Manual for Models 920 and 920M Six AA batteries Model 936 Sensor Adult Articulated Finger Clip If any item on this list is missing or damaged do not use the pulse oximeter Contact your local distributor or if you do not know your local distributor contact...

Page 12: ...blood in the vascular bed are used to determine arterial saturation and pulse rate Oxygen saturation and pulse rate are displayed on light emitting diode LED digital displays On each detected pulse the perfusion LED flashes Patient perfusion signals are graded as good marginal or inadequate and are indicated as such by the LED flashing green yellow or red This simple method gives the user a pulse ...

Page 13: ...oon as possible Replace the batteries by removing the battery door on the bottom of the 920 Be sure to follow the polarity markings on the rear label of the pulse oximeter when installing new batteries Refer to Figure I for an illustration of battery replacement Rechargeable Nickel Cadmium batteries may be used in the 920 if desired Since NiCad batteries have less than half the capacity of alkalin...

Page 14: ...6 Figure I Replacing batteries in the 920 IMPORTANT Insert these two batteries first Battery Door Battery Orientation ...

Page 15: ...sor type refer to Section VI A If additional cable length is necessary connect the Model 927 Patient Cable between the sensor and the 920 Pulse Oximeter Position the appropriate sensor on the patient Refer to Section VI for sensor positioning information Figure II Connecting sensors to the 920 2 Turning on the Pulse Oximeter Turn on the 920 Hand Held Pulse Oximeter by depressing the button on the ...

Page 16: ...f the 920 Figure IV Rear view of the 920 Digital Display Percent Oxygen Saturation Digital Display Heart Rate Perfusion Light On Switch Display Brightness And Setup Mode Off Switch Serial Number Battery Orientation Battery Door ...

Page 17: ... that the perfusion indicator is blinking green and the blinking is correlated to the pulse rate for 10 seconds Should the perfusion light be red or yellow or flashing erratically reposition the sensor or try a different sensor 4 Cleaning the Pulse Oximeter CAUTION Do not immerse the 920 in liquid to clean Do not use caustic or abrasive cleaning agents The 920 Pulse Oximeter may be cleaned with a ...

Page 18: ...d printer mode setting functions when used in conjunction with the ñ switch Refer to Section 3 of this section for Setup Mode instructions 2 Display Brightness The arrow switch ñ causes the brightness of the digital displays to change When powered up the digital display defaults to the maximum brightness Pressing the ñ will advance the brightness to the lowest setting and each subsequent press wil...

Page 19: ...ly checked since the first value displayed for each parameter represents the current setting When the setting sequence has been completed the 920 exits the setup mode and begins normal operation Range of Values Sequence Appears in SpO2 Display From To Printer Prn 00 15 Year y 00 99 Month nn 00 12 Day d 01 31 Hours h 00 23 Minutes nn 00 59 Table I Printer clock and calendar mode parameters a Printe...

Page 20: ...es Yes 04 30 Yes Yes 05 120 Yes Yes 15 No Yes For modes where the minimum SpO2 data is written there are two lines of data written for each data output The first line contains the minimum value for SpO2 since the last printout and the second line contains the current data values The touch print mode enables the user to print out data at any time This is activated by pressing the switch Table II 92...

Page 21: ...he setup mode for the day of the month The day may be set to 01 through 31 Refer to Figure VI for a flowchart of setting the calendar When the calendar setting sequence has been completed the 920 continues to the clock settings refer to section c of this section NOTE Setting the month to 00 disables the clock function and helps conserve battery life Display Press Default Setting Press Display SpO2...

Page 22: ...etting Press Display SpO2 Setup Mode Press Press Press Press Press Increment hour Press Increment minute Proceed to normal operation Figure VII Flowchart for setting the clock The printer modes are explained in Table II The modes determine how often data is written out to the printer and the format of data written to the printer For modes where the minimum SpO2 data is written there are two lines ...

Page 23: ...gnal that may affect the SpO2 data The perfusion indicator may blink one of three colors green yellow or red These colors are similar to the colors of a stoplight such that Red indicates the pulse amplitude is too small During red perfusion SpO2 and pulse rate values are not updated After ten seconds the values are replaced with dashes indicating SpO2 measurement is not possible Yellow indicates t...

Page 24: ... if the 920 is operated in a low battery condition 5 Dash in the SpO2 Display If the 920 determines that a sensor fault exists sensor disconnect sensor failure or sensor dislodgment a dash appears in the left most digit of the SpO2 display The readings that are being displayed will remain unchanged while the sensor fault exists If the sensor fault is not corrected dashes will be displayed 10 secon...

Page 25: ... assignments The information from the 920 in the real time mode is sent in an ASCII serial format at 9600 baud with 9 data bits 1 start bit and 1 stop bit odd parity The data is output at a rate of once per second NOTE The 9th data bit is used for parity in memory playback mode In real time mode it is always set to the mark condition Therefore the real time data may be read as 8 data bits no parit...

Page 26: ...he clock is set properly is stored in memory to allow quick differentiation of recording sessions Patient SpO2 and pulse rate are sampled and stored every four seconds The stored resolution of the oxygen saturation is in 1 increments in the range of 0 to 100 The stored pulse rate ranges from 18 to 300 BPM The stored values have a resolution of 1 BPM from 18 to 200 and a resolution of 2 BPM from 20...

Page 27: ...to collecting new patient data The patient information is held in memory as long as the batteries are good so if the memory has to be cleared remove the battery door for a period of 60 seconds or longer Outputting the memory does not clear any data from the memory NOTE The memory is cleared each time the batteries are changed The format of the data transferred is given in Table IV The size of this...

Page 28: ...ear Minute XX in memory second Hour XX month Day XX Stop time of file N saved year Minute XX in memory second Hour XX month Day XX Start time of file N saved year Minute XX in memory second Hour XX pulse rate SpO2 XX Data in file N pulse rate SpO2 XX pulse rate SpO2 XX Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ pulse rate SpO2 XX FE FE FC Header of file N 1 month Day XX Start time of file N saved year Minute XX in memory ...

Page 29: ...y read the instructional insert provided with the sensor NOTE Respironics sensors do not contain natural rubber latex A General Sensor Description The 920 features sensors which are ideal for nearly every application Refer to Tables V and VI for a complete list of Respironics sensors and specific information on each sensor Each sensor is designed for a specific site application and specific patien...

Page 30: ...lb Middle of forehead continuous monitoring stress testing Adult Flex 953 greater than 20 kg greater than 44 lb Index middle or ring finger extended duration motion situations for adults Infant Flex 934 2 to 20 kg 4 to 44 lb Great toe extended duration motion situations for infants Neonatal Flex 935 less than 2 kg less than 4 lb Lateral aspect of foot extended duration motion situations for neonat...

Page 31: ...rm 934D 2 to 20 kg 4 to 44 lb Great toe extended duration self adhesive motion situations for infants Neonatal Flexi Form 935D less than 2 kg less than 4 lb Lateral aspect of foot extended duration self adhesive motion situations for neonates Table VI Disposable sensor reference Respironics Sensor Accessory Reference Sensor Accessory Description Respironics Model Number For Use With Packaging Info...

Page 32: ...inger into the sensor until the end of the finger reaches the finger stop Ensure that long fingernails are not interfering with proper finger position The thumb is specifically not recommended for use with the Adult Articulated Finger Clip Sensor Figure VIII Adult Articulated Finger Clip Sensor 2 Pediatric Finger Clip Sensor Insert finger into the sensor until the end of the finger reaches the fin...

Page 33: ...or long term monitoring is required Apply the double stick tape to the side of the sensor which is applied to the patient s finger Position the sensor on the top and bottom of the finger or toe as shown in Figure X Place the light emitter portion on the finger toe nail side and the detector on the side opposite of the nail In all sensor placement applications align the windows detector and emitter...

Page 34: ...apping the tape or sensor wrap over the sensor assembly snugly but not so tight as to restrict blood flow For best results secure cable independently from the sensor preferably around patient s ankle or lower leg Make sure that the tape securing the cable does not restrict the blood flow Figure XII Infant Flex Sensor on big toe 3 Neonatal Flex Sensor The Neonatal Flex Sensor is designed for contin...

Page 35: ...these sensors has not been established for pediatric or neonatal use NOTE Reflectance and Ear Clip sensors generally do not perform as well as sensors located on the fingers or toes They are not recommended for applications where the best possible SpO2 accuracy is important 1 Ear Clip Sensor The Ear Clip Sensor is designed for adults where fingertip monitoring is impractical Rub the ear lobe vigor...

Page 36: ...s The Flexi Form Sensors are designed for monitoring adult and pediatric patients as a single patient use sensor and are intended for use where moderate patient movement is expected or cross contamination is a concern The preferred application site is the index middle or ring finger However the thumb or toes may be used where the tissue thickness is between 5 and 21 millimeters Other sites may not...

Page 37: ...ween the emitter and detector Wrap the sensor around the finger The finger nail should not be covered with tape during this step Step 3 Grip the tab on the adhesive backing of the top of the sensor and carefully peel it off Step 4 Fold the sensor s top over the top of the finger Ensure that the detector and emitter are vertically aligned as illustrated by the dotted axis line Figure XV Finger Flex...

Page 38: ...e toe of infants Other sites may not give acceptable results because of inadequate perfusion or inadequate light transmission For best results secure cable independently from the sensor preferably around the patient s ankle or lower leg Make sure the tape securing the cable does not restrict blood flow Step 1 Grip the sensor s adhesive backing and peel the adhesive off carefully from top to bottom...

Page 39: ...e results because of inadequate perfusion or inadequate light transmission For best results secure the cable independently from the sensor Make sure that the tape securing the cable does not restrict the blood flow Step 1 Grip the sensor s adhesive backing and peel the adhesive cover off Step 2 Place the sensor on the outstep of the foot just behind the toes as close to the toes as possible but no...

Page 40: ... Step 3 Wrap the tape on top and bottom as illustrated Figure XVII Neonatal Flexi Form Sensor Step 4 Ensure that the detector and emitter are vertically aligned as illustrated by the dotted axis line Top ...

Page 41: ...he sensor to dry thoroughly before reusing The sensors may be sterilized using ethylene oxide EtO cold cycle H Sensor Compatibility WARNING Use only Respironics manufactured sensors These sensors are manufactured to meet the calibration requirements for Respironics Pulse Oximeters The 920 is compatible with all Respironics manufactured sensors except the Fiber Optic sensors Refer to Tables V VI an...

Page 42: ...se Oximeter is calibrated to determine the percentage of arterial oxygen saturation of functional hemoglobin Significant levels of dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin may affect the accuracy of the measurement Cardiogreen and other intravascular dyes depending on the concentration may affect the accuracy of the SpO2 measurement Pulse oximeters use two different wave...

Page 43: ...rations are needed or are they possible There are no adjustable parts within the pulse oximeter that affect the calibration The function f does depend on the color of the LEDs producing the light These colors are fixed by the manufacturing processes and material The sensors are checked for correct operation before shipping so no adjustment or calibration is needed or possible In summary because th...

Page 44: ...10 nanometers 5 Accuracy SpO2 1 Standard Deviation 70 to 100 2 digits for adults using Finger Clip Sensors 70 to 100 3 digits for adults using Flex Flexi Form or Reflectance Sensors 70 to 100 4 digits using Ear Clip Sensors 70 to 95 3 digits for neonates using infant or neonatal sensors Below 70 is not specified for all sensors Pulse Rate 3 1 digit Standard Deviation is a statistical measure up to...

Page 45: ...0 to 95 non condensing 8 Power Requirements 6 AA alkaline batteries 100 hours typical operation maximum display brightness 200 hours typical operation minimum display brightness 9 Patient Isolation 12 MΩ 10 Leakage Current Not applicable 11 Dimensions 3 wide x 6 high x 1 deep 8 cm x 15 cm x 2 cm 12 Weight 10 oz 280 g with batteries ...

Page 46: ...g components to prevent permanent non repairable damage to the circuit board Most components are surface mounted and require special hot air jet soldering and desoldering equipment After any repairs are made the pulse oximeter must be tested to ensure correct operation NOTE All repair work on the 920 should be done by trained Respironics personnel For Respironics Technical Support contact Technica...

Page 47: ...m Respironics All repaired units shall be received by the purchaser at Respironics s place of business For any system or accessory sent to Respironics for warranty repair which is found to be within specification the purchaser agrees to pay 100 00 USD These systems are sensitive and must be repaired by knowledgeable and specially trained personnel only Accordingly any sign or evidence of opening t...

Page 48: ...al Flex Sensor 38mm outstep right angle cable with 954 Hydrogel Tape Strips 25 948 Ear Clip Sensor 951 Reflectance Sensor adult includes 10 holders Model 952 Model Disposable Sensors 953D Adult Finger Flexi Form Sensor1 10 per box 937D Pediatric Finger Flexi Form Sensor 10 per box 934D Infant Toe Flexi Form Sensor 10 per box 935D Neonatal Foot Flexi Form Sensor 10 per box 9000D Flexi Form Sensor A...

Page 49: ...1 of each 97 90 and 80 SpO2 960H Finger Phantom Holder 961 Finger Phantom Instruction and Service Manual 955 Patient Simulator 1 Flexi Form and Finger Phantom are registered trademarks of Nonin Medical Inc For further information about Respironics parts and accessories contact your local distributor If you do not have your local distributor information call Respironics and ask for your local distr...

Page 50: ...t correctly Try a new sensor if condition persists Segments of SpO2 or display are missing Defective LED displays Displayed values may not be reliable discontinue use of 920 Displayed pulse rate does not correlate to pulse rate displayed on ECG monitor Excessive motion at sensor site may be prohibiting the 920 from acquiring a consistent pulse signal Eliminate or reduce cause of motion artifact or...

Page 51: ...een perfusion Low patient pulse strength Reposition sensor on patient Sensor site poorly perfused Sensor not correctly positioned Sensor attached too tightly or tape or other items are restricting perfusion at sensor site Reapply sensor select alternate sensor site or remove restrictive material from sensor site Circulation reduced due to excess pressure between the sensor and a hard surface Allow...

Page 52: ...essive motion at sensor site may be prohibiting 920 from acquiring a consistent pulse signal Eliminate or reduce cause of motion artifact or reposition sensor to sensor site where motion is not present Printer not printing out after changing Prn mode Printer mode did not get updated internally Reset pulse oximeter by turning it off and then on If any of these solutions do not correct the problem w...

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