Ventilators

Hallowell EMC Models 2000/2002
Anesthesia Ventilator

The Model 2000 (AV-03-0001-00) and 2002 (AV-03-0002-00) are time controlled, volume-constant, pressure limited ventilators. Easily exchangeable bellows and bellows housings minimizes the ventilators dead space contribution to the breathing system and provides better resolution of tidal volume deliveries. The change between housings can easily be made in 30 seconds. Parts in contact with the breathing system are easily accessible for cleaning and sterilization.

The Model 2002 contains a 9 turn fine needle valve regulating inspiratory flow from ~ 0 to 20 lpm. The output of this FINE control adds to the output of the original volume control making it now the COARSE control. The fine control is particularly useful in making small changes to any VOLUME adjustment or for adjusting for tidal volume deliveries less than 200 ml.

Features of 2000 & 2002
Ascending bellows design. Ventilators with older and more traditional designs have bellows that fall during exhalation. There are very significant advantages associated with a system in which the bellows rises during exhalation.

Wide range of settings. Inspiratory flow rates of 0-100 liter per minute (LPM) can be utilized over the full range of 6 to 40 breaths per minute (BPM) to the tidal volume limit of the bellows and housing in use. Using the interchangeable bellows and housings and an appropriate breathing system, tidal volumes ranging from 20 ml to 3 liters may be delivered for patients ranging from rabbits and ferrets to the not-so-small 500 lb. foal.

Economical use of supply gas. The  Model 2002 is an electronically controlled time-cycled ventilator. It consumes no more supply gas than the ventilator rate, the minute volume consumption of the patient. In addition, the supply gas can be either oxygen, nitrogen, or clean dry air, a further economy.

Inspiratory hold mode. The breathing cycle may be paused at the end of the current or next inspiration for as long as the inspiratory hold button is held depressed.

Hallowell EMC MicroVent 1 Rodent Ventilator
(AV-03-0011)

The MicroVent is a dual mode ventilator. It will operate to deliver standard intermittent positive pressure ventilation (IPPV) or it will operate to deliver high frequency oscillatory ventilation (HFOV). The entire breathing system has a volume of less than  1cc. There are just four parameters to control, Oxygen flow, Frequency (breaths per minute), Amplitude (tidal volume) and Mean Airway Pressure (Paw).

In operation a small flow of fresh gas, in the range of 50-100ml/min, is set. This gas can be oxygen as provided by the built-in flow meter or any mixture of gases you provide from an external source. This gas may flow through an anesthetic vaporizer if you desire using gas anesthetics, then on to the breathing system where it passes the patient connection, flows through an open needle valve and on to your scavenging system as required. The animal may breathe spontaneously from this stream of gas as it passes the patient connection at all times. The needle valve is used to adjust Mean Paw as seen on the pressure manometer. As the valve is closed, gas flow is restricted causing pressure in the breathing system and thus in the animal's lungs to increase. This Mean Paw will maintain the expanded lungs permitting continuous gas exchange with a minimum of atelactatic alveoli.

Mouse/Rat Intubation Pack

For use in conjunction with the Rodent WorkStand. Each pack is designed to hold all the tools and supplies needed to perform quick, efficient and minimally traumatic orotracheal intubation of small rodents. The Intubation Packs come with a specially designed and molded, autoclavable intubation speculum, a lidocaine applicator, an endotracheal tube guide wire, an incisor loop and a brief video tutorial of how to perform the intubations. In addition the Rat Pack contains scissors, umbilical tape, and a mirror for the verification of tracheal intubation and the Mouse pack includes two sizes of Hallowell's NEW mouse endotracheal tubes. Packaged neatly and conviently in a 13" x 8" x 21" polypropylene organizer box with each compartment labeled for contents, reordering information and what the part is used for, it can be stored most anywhere and always be ready for use. (Both these packs are less the otoscope as ther are three approved models to choose from.)

      Mouse: (AV-03-0022)
      Rat: (AV-03-0021

Hallowell EMC Anesthesia Workstation
(AV-03-0030)

In clinical trials the AWS is being used for long term anesthetic procedures on 150-400gm rodents. The AWS has been shown to be effective with the induction, stabilization, and maintenance of patients for neurophysiological testing using inhalant anesthetics for daily 8- to 12-hour procedures. throughout these procedures the AWS has been shown to facilitate the administration of anesthetics, holding the subject in a very smooth, controllable anesthetic plane, as well as providing precise respiratory control.

The Hallowell EMC Anesthesia WorkStation is easy to use as BOTH a basic respirator (irrespective of anesthetic regime) and delivery source for inhalant anesthetics. It incorporates a time-cycled volume ventilator with an adjustable pressure safety limit. The only additional component necessary for immediate utilization is a vaporizer for the agent of your choice.