CRITIKON DINAMAP 8100 Vital Signs Monitor Operation Manual

CRITIKON, INC.

CONTENTS

List of Effective Pages.. ...ii List of Illustrations.. ...

vi

List of Tables.. ...

vi

Frontispiece.. ...

... VIII

SECTION 1.

INTRODUCTION

.l General.. ... .l Manual Purpose.. ... .l Manual Effectivity.. ... .l Reissues.. ... Change Information Sheets.. ... .1 Errors, Omissions, Incorrect Data.. ... .l .2 Related Publications.. ... 2 Instruction Labels ... .2 Service Manual.. ... SECTION 2.

PRODUCT DESCRIPTION

Overview.. ...3 Unique Operating Features.. ... 3 4 Accessories.. ... Standard Accessories.. ...4 4 Optional Accessories ... SECTION 3.

PHYSICAL DESCRIPTION

Performance Specifications ... 7 Technical Specifications.. ... 8 8 Mechanical ... 8 Electrical ... 9 Environmental ... Controls, Indicators, Connectors ... 10

...

III

DINAMAPTM PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

CONTENTS SECTION 4. FUNCTIONAL DESCRIPTION Continued

Determination Sequence . Maximum-Minimum Ranges Basic Operating Cycle Operating Modes Manual Mode AutoMode... Neonatal or Adult/Pediatric Monitoring Systolic Search Undetermined Systolic and Diastolic Pressures

SECTION 5.

.

.

.

15 17 17 18 18 18 19 19 19

INSTALLATION AND OPERATION

Unpacking ... Content Checklist ... Missing Items ... Indications and Contraindications ... Installation and Initial Setup ... Electrical and Hose Connections ... Operating Warnings, Precautions, and Notes ... Operating Procedures ... Power-On Procedure ... Set Alarm Limits Procedure ... ManualMode ... AutoMode ... Alarm Indications and Interpretation ... Patient Alarms ... System Alarms ... Troubleshooting ... Determination Unsuccessful Alarm (899) ... Power-On Self Check (888) ... Excess Time at One Pressure Alarm (855) ... Excess Determination Time Alarm (844) ... Excess Inflation Time Alarm (833) ... Microcomputer Alarm (Blank, 900 to 999) ... Excess Pressure Alarm (800) ... Monitor Will Not Power-ON ... Monitor Displays Extremely High Readings ... Monitor Displays Extremely Low Readings ... Patient Alarms Activate After Every Determination

21 21 21 21 22 22 24 28 28 27 28 28 29 29 29 33 33 33 33 34 34 34 35 35 35 35 35

CONTENTS SECTION 8.

MAINTENANCE AND CALIBRATION

Continued Maintenance ._...__., __..__... Cleaning ,_.., ., . . ..__..._..._..._ . . . Storage .., . ..__. ._...__.., . ..__.. Battery Charging Battery Removal and Replacement Changing Fuses . . .._..._..._... Replacement of Line Power Fuses , Replacement of Battery Fuse Calibration Blood Pressure Calibration Check Cuff and Hose Leak Check Performing a Cuff and Hose Pneumatic Leak Check

37 37 37 37 36 41 41 44 44 44 46 46

DINAMAPTM PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

LIST OF ILLUSTRATIONS

LIST OF TABLES

Figure No.

Title

Page

Frontispiece

VIII

3-1 3-2

Front Panel Controls and Indicators ... Rear Panel Controls and Indicators ...

10 14

4-1 4-2 4-3

Determination Sequence ... Basic Operating Cycle ... Low Amplitude Waveform Diagram ...

16 17 19

5-l

Recommended Cuff Placement

23

6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10

Loosen the Battery Door Hold-down Screws Remove Battery Door Remove Battery Remove Battery Cable Connectors Open AC Line Fuse Compartment Remove Fuse Holder Remove Fuse from Fuse Holder Replace AC Line Fuse and Fuse Holder Calibration Check Setup Cuff and Hose Leak Setup

39 39 40 40 42 42 43 43 44 47

Table No.

Title

Page

3-1 3-2

Front Panel Controls and Indicators Rear Panel Controls and Indicators

10 14

4-I

Maximum and Minimum Detectable Pressures

17

5-l 5-2 5-3

Cuff-to-Hose Compatibility Default Alarm Limits System Alarms Summary

6-1 6-2

Battery Charging Characteristics Calibration Check Pressure Levels

23 26 31132 38 46

CRITIKON, INC.

SECTION 1. INTRODUCTION

SECTION 1. INTRODUCTION GENERAL

The DINAMAPTM Portable Vital Signs Monitor 8100 is designed to noninvasively and automatically measure systolic and diastolic pressure, mean arterial pressure (MAP), and pulse rate for neonatal or adult/pediatric patients. Results are displayed on large, easy-to-read digital displays. The monitor will operate on AC line voltage or on its internal battery. The monitor will cycle automatically at operator programmed intervals between one and ninety minutes. Results of the last determination will remain displayed (up to ninety minutes) until another determination is completed. The DINAMAPT” Portable Monitor Model 8100 is effective and versatile. It continues to monitor during most clinical crises when other indirect measurement methods may fail. The monitor can be used in any hospital area where critical care is administered, for example, emergency room, operating room, recovery room, intensive care unit, cardiac care unit, renal dialysis unit, burn unit, etc.

MANUAL PURPOSE

This Operation Manual was prepared for the operator of the DINAMAPTM Portable Monitor Model 8100. This manual contains installation and operation instructions, device applications, limitations, and routine performance verification procedures. To achieve satisfactory results, the operator must read this manual thoroughly before attempting to use the Monitor.

MANUAL EFFECTIVITY

Reissues Changes to this manual, either in response to user input or to continuing product improvements, are accomplished through reissue. Change Information Sheets Changes occurring between reissues are addressed through Change Information Sheets and replacement pages. If a Change Information Sheet does not accompany this manual, it is correct as printed. Errors, Omissions, Incorrect Data If, in the normal use of this manual, errors, omissibns, or incorrect data, are noted please complete the Publications Change Request Form located in the back ot this manual. Submit the form to: Critikon, Inc. Marketing Services 4110 George Road Tampa, Florida 33634

DINAMAP’” PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

RELATED PUBLICATIONS

Instruction Labels Two permanently affixed labels, one on each side of the monitor, contain condensed operation and alarm code information. Service Manual The DINAMAP’” Portable Monitor Model 8100 Service Manual (776-370) contains service and repair parts information directed to qualified service personnel.

WARNING To avoid personal injury, the user should not perform any servicing unless qualified to do so.

CRITIKON, INC.

SECTION 2. PRODUCT DESCRIPTION

SECTION 2. PRODUCT DESCRIPTION OVERVIEW

UNIQUE OPERATING FEATURES

The DINAMAP’” Portable Monitor, Model 8100, is designed to provide operator convenience and reliability when monitoring vital signs. Features that enhance the DINAMAP’” Monitor’s operation follow.

FULLY AUTOMATIC PATIENT SELECTION AND MONITORING Senses cuff size and switches automatically from adult/pediatric monitoring to neonatal monitoring or vice versa. Can be programmed to make determinations automatically at various intervals between 1 and 90 minutes. NONINVASIVE AND OBJECTIVE Helps eliminate risks associated with invasive monitoring and subjective interpretation of auscultatory methods. OSCILLOMETRIC No microphones or external transducers are required. ARTIFACT REJECTION By observing pulsations of matched amplitude and frequency, the monitor is capable of eliminating most noise and motion artifact. SYSTOLIC SEARCH Tracks rapid pressure changes. AUDIBLE/VISUAL ALARM SYSTEM Provides a visual and audible indication if systolic or diastolic pressures, mean arterial pressure (MAP), or pulse rate fall outside of operator programmable high/low limits and of abnormal system conditions or hardware failure. COMPUTER INTERFACE Rear panel data interface terminal for routing data to host computer. AUTOMATIC PRESSURE ZEROING Microcomputer automatically establishes the zero pressure reference before each determination, thus reducing the need for constant calibration verification. PRIOR DATA RECALL Recalls data from up to 100 previous determinations during last 99 minutes of elapsed time.

DINAMAPTM PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

UNIQUE OPERATING FEATURES Continued

U DIGITAL DISPLAYS Large, easy-to-read digital displays (via high intensity LEDs) provide continuous readout of the most recent patient parameter values. 0

ACCESSORIES

FULLY PORTABLE OPERATION The monitor can be operated from a fully charged internal battery for a minimum of 6 hours (in 5 minute cycle mode with adult cuff attached) or from AC power using AC line power cord.

The accessories listed are either standard items shipped with the monitor or optional items which can be ordered separately. Reorder No.

Standard Accessories DISPOSA-CUF’” Disposable Blood Pressure Cuff Neonatal #5, 8.3 cm-l 5.0 cm

2619 (non-sterile) Regular white)

DURA-CUF’” Bladderless Blood Pressure Cuff Adult Hose (light blue), Pneumatic 8 foot (Neonate Cuffs) Hose (blue), Pneumatic, 12 foot (Adult/Pediatric Cuffs) Calibration Kit Power Cord (Domestic) (International) Operation Manual

2774

8840 8841 8886 8884 8885 776-380 Reorder No.

Optional Accessories Not included as Standard Accessories

Regular (White)

Sterile (White)

DISPOSA-CUF” Disposable Blood Pressure Cuff Neonatal #l, 3.1 cm-5.7 cm Neonatal #2,4.3 cm-8.0 cm Neonatal #3, 5.8 cm-lo.9 cm Neonatal #4, 7.1 cm-13.1 cm Neonatal #5, 8.3 cm-l 5.0 cm

2638 2633 2628 2623 2619

8311 8312 8313 8314

CRITIKON, INC.

ACCESSORIES

SECTION 2. PRODUCT DESCRIPTION

Optional Accessories - Continued

Continued

Reorder No. Regular (White) DISPOSA-CUF” Blood Pressure Cuff Large Adult Adult Small Adult Thigh Child Infant

2643 2603 2608 2648 2613 2618

DURA-CUF” Bladderless Blood Pressure Cuff 31 .O cm-40.0 cm Large Adult, 23.0 cm-33.0 cm Adult, 17.0 cm-25.0 cm Small Adult, Thigh, 38.0 cm-50.0 cm Child, 12.0 cm-l 9.0 cm Infant, 8.3 cm-l 5.0 cm

2791 (Wine) 2774 (Navy Blue) 2779 (Royal Blue) 2796 (Brown) 2781 (Green) 2783 (Rust)

Hose (blue), Pneumatic, 24 foot (Adult/Pediatric Cuffs only) Model 902 Mobile Stand DI NAMAP” BP Accessory Pole DINAMAP” BP Accessory Base DINAMAP” BP Accessory Basket Service Manual

8842 0902 3207 3208 3209 776-370

Infection Control

(Yellow) 2642 2602 2607

5

CRITIKON, INC.

SECTION 3. PHYSICAL DESCRIPTION

SECTION 3. PHYSICAL DESCRIPTION The DINAMAP’” Portable Monitor Model 8100 is a microprocessor controlled noninvasive device housed in a blue plastic case. Performance and technical specifications for the Model 8100 follow. Tables 3-l and 3-2 contain a general physical description of the monitor’s controls, indicators, connectors, and operating requirements

PERFORMANCE SPECIFICATIONS

CUFF PRESSURE RANGE 0 mmHg to 250 mmHg Adult/Pediatric 0 mmHg to 235 mmHg Neonate INITIAL CUFF INFLATION 178 + 15mmHg Adult/Pediatric 125 ? 15 mmHg Neonate SYSTOLIC DETERMINATION (Maximum) 245 mmHg Adult/Pediatric 30 mmHg (Minimum) (Maximum) 190 mmHg Neonate (Minimum) 30 mmHg MAP DETERMINATION (Maximum) 225 mmHg Adult/Pediatric (Minimum) 20 mmHg (Maximum) 170 mmHg Neonate 20 mmHg (Minimum) DIASTOLIC DETERMINATION (Maximum) 210 mmHg Adult/Pediatric (Minimum) 10 mmHg (Maximum) 160 mmHg Neonate 10 mmHg (Minimum) BLOOD PRESSURE ACCURACY Blood pressure accuracy meets and exceeds proposed AAMI standards for non-invasive blood pressure accuracy. (AAMI standard: & 5 mmHg mean error; 8 mmHg standard deviation.) PULSE RATE DETERMINATION (Maximum) 200 bpm Adult/Pediatric (Minimum) 40 bpm (Maximum) 220 bpm Neonate (Minimum) 40 bpm

7

DINAMAPTM PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

PERFORMANCE SPECIFICATIONS

PULSE RATE ACCURACY + 3.5 percent

Continued DETERMINATION TIME 20 seconds to 45 seconds typical; 120 second maximum OVERPRESSURE CUTOFF 310 + 45 mmHg Adult/Pediatric 235 + 10 mmHg Neonate BATTERY CHARGING At least 90% capacity in 16 hours. Unit will operate and charge battery simultaneously when connected to AC power source.

TECHNICAL SPECIFICATIONS

Mechanical DIMENSIONS Height 8.8 inches Width 6.7 inches 6.7 inches Depth WEIGHT Approximately 8.6 pounds COLOR Blue case with black front panel MOUNTINGS Self-supporting on rubber feet or pole mountable. PORTABILITY Carrying handle recessed in top of monitor. OPERATOR’S INSTRUCTIONS/ALARM INTERPRETATION Abbreviated operator’s instructions and alarm interpretations are located on side panel labels.

Electrical POWER CABLE Domestic - 10 foot detachable blue-jacketed 16-gauge terminated with 3-prong hospital grade plug International - 10 foot detachable blue-jacketed 16-gauge unterminated BATTERY Six hour minimum operation (5 minute auto cycle w/adult cuff at 25 degrees C) with full charge. Battery is 90% to 100% charged after 16 hours of charging (see table 6-1, Battery Charging Characteristics).

CRrrKm. lw.

TECHNICAL SPECIFICATIONS

SFCTION 3. PHYSICAL

tJFSCRIPTION

Elect rlcal POWER REQUIREMENTS Input Power 0.4 amps max. at 100,120 VAC 0.2 amps max. at 220,240 VAC Input Voltage

(Domestic) 120 VA060 Hz (nom.), 104-132 VAC, 47-63 Hz (International) 100 VAC/50 Hz (nom.), 88-112 VAC, 47-63 Hz 230 VAC/50 Hz (nom.), 194-268 VAC, 47-63 Hz FUSE REQUIREMENTS

120 VACIGO Hz-2 each, 0.5 amp, 3AG at 250 VAC 100 VAC150 Hz-2 each, 0.5 amp, 3AG at 250 VAC 230 VACI50 Hz-2 each, 0.25 amp, FST at 250 VAC POWER CABLE Domestic-l 0 foot detachable blue-jacketed 16 gauge terminated with 3prong hospital grade plug International-l 0 foot detachable blue-jacketed 16-gauge unterminated

BATTERY 12 volt, 2.4 amp-hours. Six hour minimum operation (5 minute auto cycle w/adult cuff at 25 degrees C) with full charge. Battery is 90% to 100% charged after 16 hours of charging (see Table 6-1, Battery Charging Characteristics).

TECHNICAL SPECIFICATIONS

Environmental OPERATING TEMPERATURE +5O”F to +104”F +lO”C to +4O”C STORAGE TEMPERATURE -29°F to +167’F -34OC to +75”C HUMIDITY RANGE 0% to 95% noncondensing ALTITUDE RANGE -1000 feet to +15000 feet 1’ 1 BF SYMBOL: This symbol indicates the classification of this -type of equipment is in compliance with IEC Publication 601-l and BS 5724-1, Type BF.

A!

ATTENTION: Consult accompanying documents.

9

l-

-5

+6 19

-7

18

-8 -9 -10

17 16

-11 15

10

Figure 3-1.

Model 8100 Front Panel Controls and Indicators

TABLE 3-l

MODEL 8100 FRONT PANEL CONTROLS AND INDICATORS

ITEM NAME

FUNCTION

1

CUFF

This illuminated (amber) indicator signifies that a determination is in progress.

2

kPa

kPa (amber) indicator lights on/y if internal kPa jumper is installed.

CRITIKON, INC.

TABLE3-1.

MODEL 8100 FRONT PANEL CONTROLS AND INDICATORSContinued

ITEM NAME

FUNCTION

MAP mmHg

This 3-digit red LED display shows mean arterial pressure. In addition this display; 0 flashes cuff pressure during deflation time. El shows MAP alarm limits (see Item 18, SELECT).

SYSTOLIC mmHg

This 3-digit red LED display shows systolic pressure. In addition, this display q shows systolic alarm limits (see Item 18, SELECT).

DIASTOLIC mmHg

This 3-digit red LED display shows the diastolic pressure. In addition this display: 0 shows diastolic alarm limits (see Item 18, SELECT).

START

This green momentary pushbutton switch initiates a determination in manual or auto mode. The START switch initiates a determination only during wait time; pressing START switch during a determination has no effect. In manual mode, determinations are initiated by pressing the START switch. In auto mode, pressing the START switch will initiate a determination and begin a new cycle.

CANCEL

This red momentary pushbutton switch performs several functions. Pressing this switch will 1) terminate a determination in progress; 2) cancel all visual and audible alarms except certain system alarms (refer to Table 5-3, System Alarms Summary table); 3) exit the calibrate mode; 4) exit patient alarm set routine; and 5) exit Prior Data Displayed Mode. Visual and audible alarms may be cancelled during wait time and the displays will maintain the last determined values.

SET

This grey momentary pushbutton switch increments the MINUTES display when in auto mode. The MINUTES increments are 1,2, 3,4,5, 10, 15,20,30, 45,60, and 90 minutes. Holding the SET switch in for 4 seconds while momentarily pressing the ON switch places the monitor in calibrate mode, where it will remain for 3 minutes. Holding the SET switch for 20 seconds while momentarily pressing the ON switch will cause the monitor to remain in calibrate mode indefinitely.

SECTION 3. PHYSICAL DESCRIPTION

CRITIKON, INC.

TABLE34 Model8100 FRONTPANELCONTROLSAND INDICATORS Continued ITEM NAME -

FUNCTION

9

This 2-digit red LED display shows the cycle time (in minutes) when the monitor is placed into automatic mode. The display is normally blanked when in manual mode. In either mode, the elapsed time since the last data update (up to 90 minutes) is flashed in the CYCLE MINUTES display.

CYCLE MINUTES

When auto mode is first entered, the display indicates a default cycle time of three minutes. This cycle time can be changed by using the SET switch. Periodically, the elapsed time of the current cycle is displayed briefly to indicate the amount of time elapsed since the last data update. 10

PRIOR DATA

Depression of this switch will cause the monitor to display the data from the previous determination and the elapsed time (in minutes) since the determination was made. Pressing the switch a second time will display the data from the next previous determination, etc. A total of 100 previous determinations may be recalled (for up to 99 minutes). The monitor will exit the PRIOR DATA display if any other switch is pressed or if 10 seconds elapses with no activity. Placing the front panel power switch into the OFF position clears all stored data in memory. This white pushbutton membrane switch controls the power to the monitor. If AC line power is attached to the rear panel, and the rear panel switch is in the “I” position, the battery charger will operate regardless of POWER ON/OFF switch position. This yellow LED indicates that the monitor is operating on power from the internal battery. Flashes when less than approximately 10% battery charge remains.

11

POWER ON - OFF

12

BATTERY

13

MAINS AC This green LED indicates that AC line power is RECHARGE present and battery is being charged.

14

CUFF CONNECTOR

Screw type connectors for connection of pneumatic (cuff) hose.

11

DINAMAP’” PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

TABLE3-1. Model8100 FRONT PANELCONTROLSAND INDICATORS Continued ITEM NAME

FUNCTION

15

LOW LIMIT

This grey momentary pushbutton switch displays the current low alarm limit that you select (SELECT switch). If you push and hold this switch, you will cause the display to step through the entire range of low limit settings (settings overlapping the high limit will not be displayed.) The new low limit alarm setting will be the setting that is displayed at the time you release the LOW LIMIT switch.

16

SILENCE

This grey momentary pushbutton switch with LED indicator alternately mutes and enables the audio alarm. When pressed (SILENCE ON) the LED indicator lights to indicate that the audio portion of the alarms have been silenced. When an alarm condition is detected the LED will flash but no audio alarm will sound. Press again to enable audio alarm.

17

HIGH LIMIT

This grey momentary pushbutton switch displays the current high alarm limit that you select (SELECT switch). If you push and hold this switch, you will cause the display to step through the entrre range of high limit settings (settings overlapping the low limit will not be displayed). The new high limit alarm setting will be the setting that is displayed at the time you release the HIGH LIMIT switch.

ia

SELECT

This grey momentary pushbutton switch selects the alarm limits to be displayed. Depressing the switch the first time 0 blanks all displays except SYSTOLIC, and 0 allows the HIGH LIMIT and LOW LIMIT switches to be used to display (set) the high and low systolic alarm limits in the SYSTOLIC display. Pressing the switch a second time blanks all displays except MAP, and 0 allows the HIGH LIMIT and LOW LIMIT switches to be used to display (set) the high and low MAP alarm limits in the MAP display.

q

Pressing the switch a third time 0 blanks all displays except PULSE, and 0 allows the HIGH LIMIT and LOW LIMIT switches to be used to display (set) the high and low pulse rate alarm limits in the PULSE display.

12

CRITIKON, INC.

SECTION 3. PHYSICAL DESCRIPTION

TABLE 3-1.

Model8100 FRONT PANEL CONTROLSAND INDICATORS Continued

ITEM NAME

FUNCTION

ia

Pressing the switch a fourth time 0 blanks all displays except DIASTOLIC, and Cl allows the HIGH LIMIT and LOW LIMIT switches to be used to display (set) the high and low diastolic alarm limits in the DIASTOLIC display.

SELECT continued

Pressing the switch a fifth time 0 returns the values of the last determination to all displays. There is a lo-second time limit for each of these operations at which time the monitor automatically returns to the previous displays. 19

AUTO/ MANUAL

This white momentary pushbutton switch with adjacent LED indicators controls and indicates the mode of operation for the monitor, Pressing this switch changes the operating mode as indicated by the associated green LED. Manual mode is entered when power is first applied to the monitor. In manual mode, a single determination is made each time and only when the START switch is pressed. In auto mode, one determination is initiated immediately. Subsequent determinations occur at the end of the cycle time shown in the CYCLE MINUTES display (Item 9). Determinations may be initiated at any time by pressing the START switch (during wait time). The cycle timer starts when auto mode is first entered and restarts at the beginning of each automatic or manually started determination.

20

PULSE bpm

This 3-digit yellow LED display shows pulse rate. In addition, this LED display: 0 shows the alarm codes during certain alarm conditions. Refer to Section 5, Troubleshooting. 0 shows pulse rate alarm limits (see Item 18, SELECT).

13

DINAMAP’” PORTABLE ADULT/PEDIATRIC and NEONATAL VITAL SIGNS MONITOR OPERATION MANUAL

Figure 3-2.

Model8100 Rear Panel Controlsand Indicators

TABLE3-2.

14

MODEL 8100 REAR PANEL CONTROLS AND INDICATORS

ITEM NAME

FUNCTION

1

Pole Clamp

Clamps monitor securely to pole.

2

Battery Compartment

Contains internal battery. Removal of two screws allows changing battery without affecting other internal parts.

3

Data Interface Connector

4

AC Power Switch

Port for connection of external computer. NOTE: The maximum non-destructive voltage which may be applied to any pin on the Data Interface Port is + 5v. Any connections made to these ports must be in accordance with the Service Manual. Controls the AC power to the monitor. I = ON 0 = OFF

5

AC Line Fuses

Contained under latched fuse compartment door. See Section 3, Electrical Specifications for ratings.

6

Line Power Connector

AC power cord connector.

SECTION 4. FUNCTIONAL DESCRIPTION

CRITIKON, INC.

SECTION 4. FUNCTIONAL DESCRIPTION The DINAMAP’” Portable Monitor, Model 8100, is a fully portable, microprocessor controlled, noninvasive device that automatically measures systolic pressure, diastolic pressure, mean arterial pressure (MAP), and pulse rate for neonates, children, and adults using the oscillometric technique. Results are displayed on four large, easy-toread digital displays. Determination interval can be selected by the operator in varied increments between one and ninety minutes. Two operating modes (auto and manual) are selectable to cover a variety of clinical situations and up to 100 previous determinations are stored in memory for recall and display. Alarms are provided to alert the operator should systolic, diastolic, mean arterial pressures or pulse rate values exceed default* or operator-set high/low limits. The monitor provides external digital output for connection to a host computer.

DETERMINATION SEQUENCE

A determination sequence begins 0 when the START switch is depressed in either manual, auto, or calibrate mode; 0

upon entry into auto mode;

0

when the cycle time has expired in the auto mode.

Refer to Figure 4-1, Determination Sequence. The first determination sequence initially pumps up to a cuff pressure of 178 mmHg for adult/ pediatric patients, or 125 mmHg for neonates. The monitor immediately begins a stepped deflation sequence and determines systolic pressure, MAP (mean arterial pressure), diastolic pressure and pulse rate from pulses induced in the cuff at the varied pressure levels. This is the oscillometric method of determination and is accomplished by a sensitive transducer which not only measures cuff pressure, but also minute pressure oscillations within the cuff.

*Default alarm limits are limits generally found useful in normal clinical situations. They should not be considered as safe limits for any particular patient.

15