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Bio-Med Devices
Frequently Asked Questions

 


Crossvent FAQs

How long will my cylinder last while using the CV4?

Can I add entrainment to my Crossvent later if I buy it now without?

What is the expected life of the battery in the Crossvent?

Which pneumotach should I buy for my Crossvent?

How should I set the Pressure Cycle function on my CV4?

Why does my blender leak gas out the bottom?

Can I replace the Power Supply that comes with the Crossvent with an "off the shelf" supply?

What does it mean to "refresh" the battery?

Do I need a Service Requisition Form to send a unit in for service?

What are the power requirements for the Crossvent ventilators?

Can I use the Crossvent with an inverter?

Can I replace the battery in my Crossvent with any 6 D-cell pack?

How long does it take to fully charge the battery in the Crossvent?

How long will a fully charged battery last in the Crossvent?
 

 

How long will my cylinder last while using the CV4?

This depends on several factors, but mostly cylinder pressure and tidal volume. The following formula may be used to calculate gas consumption for these ventilators. The result will give you the minutes remaining (or full duration if the cylinder pressure reflects a full cylinder).  For a comprehensive sheet (Acrobat Reader required) to print for your records, click here.

Cylinder Pressure x Factor(1)
Minute Volume + 2(2) LPM

(1) Commonly used factors for cylinders (air or O2)
D-CYL.   E-CYL.   G-CYL.   H-CYL.   M-CYL.
.16     .28     2.41      3.14    1.56

(2) Average gas consumption of the pneumatic
logic circuit in the CV-4.

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Can I add entrainment to my Crossvent later if I buy it now without?

Yes, both the CV3 and CV4 can be upgraded with the entrainment option at any time. We strongly recommend, however, that they be purchased with this option when new as it is much more cost effective.



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What is the expected life of the battery in the Crossvent?

It is recommended that the battery be replaced every two years for optimum performance. The cycle (charge/discharge) life is 500 - 2000 cycles. It is recommended that you leave the charger plugged in when the ventilator is not in use whenever possible. Also, recharge the battery as soon as possible after using the ventilator in battery mode. To help ensure you get the optimum performance out of your Crossvent's  battery, it should be periodically refreshed.  Click here for more information on the Crossvent's  battery.


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Which pneumotach should I buy for my monochrome Crossvent?

We offer several pneumotachs, catalog numbers 4407, 4408, and 4409 (CV2 & CV2i only). They are not interchangeable. The 4407 is distinguished by female luer fittings on the ends of its tubes while the 4408 has male luer fittings on the ends of its tubes. The 4409 has no fittings on the end of its tubes.  Check the side of your CV4 to see which fittings you have that will mate with those on the pneumotach. These fittings dictate the matching pneumotach.  If your proximal and distal fittings are male on the ventilator, then order the 4407. If female, then order the 4408.  If the fittings are male recessed in a hexagon collar, order the 4409.


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How should I set the Pressure Cycle function on my CV4?

Pressure Cycle is no longer a separate function set by the user. The software has changed to incorporate it into the peak pressure high alarm limit. It is recommended that if you still have this function in your Crossvent, you send it to Bio-Med Devices to be updated with the latest software enhancements. 


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Why does the blender on my Crossvent leak gas out the bottom?

The blender only exhibits this bleed when the knob on the side of the blender is set to <15 LPM.  This bleed is necessary to ensure concentration accuracy when using the blender for low flows, typically between 3 and 15 LPM. If your flow requirements are above 15 LPM, then set the knob to >15 LPM and no bleed will be necessary.   For a more in-depth explanation of blender bleeds, you can click here.

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Can I replace the Power Supply that comes with the Crossvent with an "off the shelf" supply?

No, this is not recommended. Any other power supply, other than the one provided by Bio-Med Devices may cause damage and/or unreliable operation. Refer to Power Requirements


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What does it mean to "refresh" the battery?

To refresh the battery means to recondition the rechargeable battery by fully discharging and then recharging it. To do this with the Crossvent, unplug the external power supply, turn the unit on and put it in TEST mode. Press "VALVES" and turn each valve ON. Leave the unit this way until the display is blank. Turn the Crossvent off, wait at least one minute,  then plug the external power supply back in. Charge the battery for a minimum of four hours.


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Do I need an Service Requisition Form to send a unit in for service?

Yes. Download  Service Requisition Form 


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What are the power requirements for the Crossvent ventilators?

When using a desktop plug-in power supply, only the power supply provided by Bio-Med Devices should be used. Any other power source must comply with the following standards:

  • Output: 16.0 VDC, 3 A
  • Output Protection: Short Circuit and Overload
  • Isolation: Meets IEC601.1, classification BF, UL 544 Patient Care, CSA 125 Risk Class 2G
  • Maximum Ripple: <100 mVp-p
  • Safety: Approved to UL 544/2601.1, CLU (CSA) 22.1 #125/601.1, TUV EN60601.1 & CE LVD
  • EMC: Designed to Level B Requirements of FCC part 15, CISPR11 (EN55011). Less than 1 Volt Output Deviation for IEC801-2, 3, 4, 5, Immunity Tests.

For more important information concerning this issue, please click here.


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Can I use the Crossvent with an inverter? 

If an inverter is necessary, it must conform to NEMA standards.  Inverters with "split winding" output transformers should not be used.  For more important information concerning this issue, please click here.


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Can I replace the battery in my Crossvent with any 6 D-cell pack? 

No. The battery should be provided by Bio-Med Devices to ensure it conforms to the specifications of the ventilator, both electrically and physically. Order part #PRT4402 for Crossvents 2, 3, & 4.  Order PRT2225 (C-cell pack) for the Crossvent 2i.  For the Crossvent + series (except Crossvent 2i+), order PRT4467.  Order PRT2268 for the Crossvent 2i+.


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How long does it take to fully charge the battery in the Crossvent? 

A fully depleted battery at room temperature should take approximately 5 hours to fully charge. Only use the power supply provided with the Crossvent to operate the unit and to charge the battery.


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How long will a fully charged battery last in the Crossvent? 

A fully charged battery under normal conditions should last approximately 11 hours with the backlight off. With the backlight on continuously, it will provide power for approximately 5 hours. With the backlight on occasionally, it will fall somewhere between these times.


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