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Guides and repair information for the Novametrix Model 7300, a cardiac output monitor manufactured by Novametrix Medical Systems.

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== Background and Identification ==

The Novametrix Model 7300 is a cardiac output monitor manufactured by Novametrix Medical Systems. It is also known as the NICO model 7300. Novametrix was a producer of airway pressure monitors, transcutaneous blood gas monitors, pulse oximeters, capnographs, respiratory mechanics monitors, and volumetric carbon dioxide monitors. Novametrix is now owned by Philips Respironics, a medical device conglomerate.

The NICO model 7300 monitor is designed to measure cardiac output based on changes in respiratory carbon dioxide concentration. Cardiac output measurements are completed by interpreting data collected by a variety of sensors that measure carbon dioxide concentration, airway pressure, and flow rate. These measurements are combined to calculate the patient’s carbon dioxide elimination. Cardiac output is then calculated using Fick partial rebreathing. A rebreathing cardiac output measurement is made every three minutes with a rebreathing rate of 50 seconds.

The 7300 model can be used with mechanically ventilated patients in intensive care, emergency departments, or the operating room. It is powered by an internal lead-acid gel-cell battery with an advertised run time of 45 minutes on a full charge. The battery takes approximately 12 hours to fully recharge.

The NICO 7300 includes the name “NOVAMETRIX MEDICAL SYSTEMS INC.” printed in capital letters near the bottom right-hand corner of the monitor’s front face. The name “NICO” is printed in capital block letters near the upper right-hand corner of the model’s front face. A digital display presents alerts, trend information, and cardiac output measurements.

== Technical Specifications ==

=== NICO ===

* Measurement Frequency: Rebreathing cardiac output measurement made every three minutes, rebreathing period is 50 seconds.
* Cardiac Output Range: 0-19.9 liters/minute
* Cardiac Output Resolution: 0.1 liters/minute
* Pulmonary Capillary Blood Flow (PCBF) Range: 0-19.9 L/min, Resolution: 0.1 L/min
* Cardiac Index Range: 0-9.9 L/min/meter^2, Resolution: 0.1 L/min/meter^2
* Stroke Volume Range: 0-250 ml, Resolution: 1 ml
* Rebreathing Valve/sensor:
** Valve type: dual-diaphragm, pneumatically controlled
** Return spring: automatically returns valve to normal position
** Resistance: 3cmH2O/L/min maximum
** Rebreathed volume: normal position 35ml; rebreathing position 150-450ml (large)
* CO2/flow sensor: integrated into valve assembly
* Parameter limits for NICO measurements:
** VCO2: >20 ml/min
** RR: >3, <60
** Vt: >200
** ETCO2: >15, <70 mmHg

=== CO2 ===

* Principle of Operation: Non-Dispersive Infrared (NDIR) absorption, dual-wavelength ratiometric-single beam optics, mainstream sensor.
* Response Time: Less than 60 ms
* Gas composition effects: Operator selectable
* CAPNOSTAT® CO2 Sensor:
** Weight: Less than 18 g without cable
** Sensor Size: 1.3 x 1.67 x .85 inches (3.3 x 4.2 x 2.2 cm), 8 foot cable (2.44 m)
** Construction: Durable high-performance plastic, ultra-flexible cable
** Shock Resistant: Sensor will withstand a 6-foot drop to a tile floor
* End Tidal CO2:
** Range: 0-150 mmHg, 0-20 kPa or %
** Accuracy: ± 2 mmHg for 0-40 mmHg, ± 5% of reading for 41-70 mmHg, ± 8% of reading for 71-150 mmHg
* Respiratory Rate:
** Range: 1-150 breaths/min
** Accuracy: ± 1 breath/min

=== Flow Sensor ===

* Flow Range: 2 to 180 L/min @ Barometric Pressure 760 mmHg, room air, 35°C
* Flow Accuracy: Greater of ± 3% reading or .5 L/min
* Minute Volume Range: 2 to 60 L/min
* Tidal Volume Range: 100 to 3000 ml
* Airway Pressure Range: -120 to 120 cmH2O

=== SpO2 ===

* Oxygen Saturation
** Range: 0-100%
** Accuracy: ± 2% for 80-100% (± 1 standard deviation), unspecified for 0-79%
** Averaging Time: 2 seconds
* Pulse Rate:
** Range: 30-250 beats per minute
** Accuracy: ± 1% of full scale
** Averaging Time: 8 seconds

=== Monitor Specifications ===

* Classification (IEC601-1): Class I/internal power source, type BF, continuous operating mode
* Operating Environment: 50-95° F (10-35° C), 0-90% relative humidity (non-condensing)
* Size: Height 6.5 in., Width 10.75 in., Depth 9.5 in.
* Weight: 10 pounds
* POWER: 100-240 VAC, 50-60 Hz, 40VA
* Fuse Rating: 100-240 VAC, 0.5 A 250 V Slo-Blo (x2); 200-240 VAC, T 250 mA/250 V (x2)
* Battery: Internal, Sealed lead-acid gel-cell, 45-minute life on full charge (on-screen life indicator), 12 hours recharge time.
* Display: 4.625 x 3.5 inch EL, 320x240 pixels
* Electromagnetic Emissions: Conforms to EMC Directive 89/336/EEC, CISPR Class A. Tested to EN55011 (1991) and CISPR11 (1990).
* Electromagnetic Immunity: Conforms to EMC Directive 89/336/EEC, EN50082-1 (1992). Tested to IEC801-3 (1984) Radiated Immunity. Conforms to Medical Device Directive 93/42/EEC EN60601-1 (1992). Tested to IEC801-2 (1991) ESD, IEC801-4 (1988) EFT, and IEC1000-4-5 (1995) Surge Immunity.

== Additional Information ==

[link|https://www.dotmed.com/listing/co2-monitor/novametrix/7300/2119368|Novametrix Model 7300 Product Page]

[link|http://www.meditegic.com/wp-content/uploads/pdfs/Novametrix_7300_User_manual.pdf|Novametrix Model 7300 User Manual]

[link|https://www.opweb.de/english/company/Novametrix_Medical_Systems_Inc/Model_7300|Novametrix Model 7300 Service Manual]

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Nico_Service_Manual.pdf

Novametrix_7300_-_Service_manual.pdf

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