This website uses cookies to ensure you have the best experience. Learn more

Mechanical Ventilation Essay

1342 words - 6 pages


Flinders Medical Centre’s preset mode for mechanical ventilation is Synchronised intermittent mandatory ventilation (SIMV).

SIMV achieves a mandatory minute ventilation by,

Mandatory controlled breathing
Assisted breaths which are synchronised with a patient trigger
Spontaneously triggered and patient controlled breaths often with assistance (Tol & Palmer 2010).

Mandatory breaths deliver a preset volume over a set time, Synchronised breaths still give mandatory breaths which are preset but are synchronised with respiratory effort reducing the danger of breath stacking causing barotruama, and spontaneous breaths are initiated and controlled by the patient including respiratory ...view middle of the document...

Therefore the current tidal volumes delivered for Mr J seems appropriate (Gattinoni et al, 2006).

Mr J also has a high PaC02 of 53, so a volume controlled mode is appropriate to help clear his C02. Mr J also has a history of Chronic heart failure, previous MI, and Hypertension, so close haemodynamic monitoring would be important due to potential issues created by increasing airway pressures.


In flinders medical centre the standard setting for the respiratory rate is 14.

The respiratory rate of 14 is often set as a minimum backup in SIMV enabling the patient to start taking spontaneous breaths, and control minute ventilation in accordance with their needs (Hasan 2010).
12-20 breaths per minute is within normal range for a self-ventilating patient so 14 would be on the lower side (Aitken, Elliott & Chaboyer 2012).
Respiratory rate can affect the tidal volume and consequently minute volume having a direct impact upon CO2 retention or evacuation (Hasan 2010).
The set respiratory rate must take into consideration inspiration and expiration requirements for adequate ventilation, and the contributing effort of the patient (Aitken, Elliott & Chaboyer 2012).

In relation to Mr J, he is not making any respiratory effort, and his PaCO2 level is 53 with a pH of 7.32. So a rate of 14 would not be adequate ventilation. Later on we see that Mr J has his respiratory rate turned up to 16 with a good result of a PaCO2 level of 38 and a pH of 7.38.

Tidal Volume:

Flinders Medical Centre sets its tidal volume at 500mls,
500mls is based on an average ideal body weight of 70kg and uses the equation of 6-8mls/kg which is an advised ratio in all ventilated patients (Determann et al, 2010).

Mr J has a weight of 74 kg and a height of 176cm, which would give him a predicted body weight of 70.7kg which is close to Mr J’s current weight (Aitken, Elliott & Chaboyer 2012). According to the predicted body weight chart supplied by ARDSnet, Mr J should have a tidal volume between 424-566mls . Giving Mr J a tidal volume of 500mls in a normal situation would seem appropriate, however since the tidal volume directly impacts ventilation and Mr J’s CO2 levels are high, a higher tidal volume up to 550mls (as he is actually being given) would seem appropriate (Orlando Health 2010).

Flow pattern waveform:

A square wave form is used at Flinders Medical Centre which represents a constant inspiratory flow rate during the inspiration time (Orlando Health 2010). Flow is the speed at which air moves through the circuit, and this is set at 30L/min on admission.

When giving a set tidal volume of 500mls, a square waveform with a flow of 30L/min minimises inspiratory time to 1 second, and allows for a longer exhalation but consequently has a higher peak inspiratory pressures which may not be good with compliance issues (Hasan 2010). For decelerating waveform see appendix no 1.

In relation to Mr J, his peak pressure and compliance are...

Other Essays Like mechanical ventilation

How Glasshouses Could Be Used to Maximise Crop Production

1030 words - 5 pages peppers, experience the highest rates of photosynthesis between 21-23˚C, whilst root zone temperatures should be at around 18-21˚C. Transpiration rates can also be affected as the underside stomata and guard cells on a plants leaf may be kept open, causing water loss from the plant leading to reduced crop production. Likewise to light, temperature may also be controlled through ventilation or shading, or conversely heating and insulated glasshouses

Integrated Building Services Essay

1018 words - 5 pages continue to require some form of mechanical ventilation and air conditioning. The provision for such systems is of critical importance as it affects the layout and type of members chosen in the structure. The basic decision to either integrate the services within the structural depth or to suspend the services below the structure affects the choice of structure, the fire protection system, the cladding details and the overall building height


533 words - 3 pages diet following extubation from mechanical ventilation has also been shown to be inadequate. Peterson assessed the oral intake of 50 patients for the first seven days after extubation and found that mean energy and protein intake was <50% of estimated requirements on all seven days of the study period. (JCN, 2014) The authors identified a number of factors that may be associated with inadequate nutritional intake in extubated patients, including


1337 words - 6 pages splicers, installers, outside plant technicians, central office technicians and frame technicians. These jobs are highly skilled, particularly as a result of the new technological equipment. For example, employees must be very proficient in the electrical, electronics and/or mechanical fields as they relate to the installation, service and maintenance of telecommunications equipment. Training is acquired through classroom and on-the-job training

Arterial Blood Gas

1790 words - 8 pages cannot be readily resolved, the patient may require mechanical ventilation while treatment is rendered. Although patients with hypoventilation often require supplemental oxygen, it is important to remember that oxygen alone will not correct the problem. Respiratory Alkalosis Respiratory alkalosis is defined as a pH greater than 7.45 with a PaCO2 less than 35 mm Hg. Any condition that causes hyperventilation can result in respiratory

Environmental Friends House

2426 words - 10 pages , Asthma, hypertension and overweight saw a significant improvement and also due to improved mechanical ventilation and kitchen and bathroom fans carbon monoxide and various other pollutants were under control. There were fewer moisture and dampness issues, little or no pest problems, and less smoke indoors. It was noted from Stockholm study that asthma allergies and eczema were more common in buildings which utilized less energy for space heating

Industrial Engineering

4948 words - 20 pages | Project On Industrial Engineering | | Industrial Engineering | Dhrubak BanerjeeSontu MalMonojit ShawBibhas SatpatiArunangshu PatiSandip Kumar JhaManasi Roy Chowdhury | | Under the guidance of Prof. S.K.Chakrabarti Mechanical Department, Future Institute Of Engineering And Management | ACKNOWLEDGEMENTS: * To the management & staff at Mondal Enterprises for allowing us into their shop & for their

Spinal Cord

1827 words - 8 pages Spinal shock usually lasts 7-10 days but can last weeks to 3 months. When spasticity, reflex emptying of bladder and hyperreflexia occurs- end of spinal shock stage. Acute rehabilitation can begin even if spinal shock present.- if rehab delayed can develop complications such as contractures COMPLICATIONS OF SCI: 1) RESPIRATORY SYSTEM • Injury to C1-C4- total loss of respiratory function- requires mechanical ventilation â

Holistic Health And The Environment

1501 words - 7 pages . There are a variety of these on the market, with varying levels of effectiveness. The main categories include adsorption filters, mechanical filtration (HEPA), electrostatic filtration, and negative-ion generation. It is widely accepted that activated carbon is the most useful for removing various gases, and particularly effective in removing lead, pesticides, and tobacco-smoke via adsorption . A simple pie-pan of the substance will do wonders for

Bangladesh Labor Code - Practice

3435 words - 14 pages environment. In this report we tried to find problems in Akota Packaging regarding labor law 2006. We found some problems such as factory was messy, problems in ventilation system, factory was over crowded, The latrines was not clean, no fire extinguisher available, Machines were not fenced properly, workers caring overweight, no breathing apparatus, no existenence of safety record book, no canteen facilities, no rest room, no room for workers children

Technology, Environment and Society

5356 words - 22 pages , transmission of infectious disease e.g. influenza, measles etc. Remedial measures of indoor air pollution • Proper ventilation, use of fans, exhaust fans, inspection of chimneys, furnaces annually, restricted use of asbestos, proper disposal of organic materials 3.4 Noise pollution Sound: produced by mechanical vibration of sound source, transmitted in the form of wave Wavelength: distance between peaks or valleys Amplitude

Related Papers

Design Directions And Trends In Portable Ventilators

2602 words - 11 pages process in which humans exchange air between the lungs and the environment by means of exhalation and inhalation. Muscles are involved in this process, but disease or trauma to our bodies may result in the need for manual and/or mechanical ventilation. This is ventilation by artificial and extrinsic means, but it may sustain the life of an individual with insufficient respiratory function. There are models of mechanical ventilators designed and

Material Data Sheet Polyester Essay

1294 words - 6 pages the overall exposure and may invalidate the TLV 100 ppm 200 ppm OSHA PERMISSIABLE EXPOSURE LIMITS (PELs) PEL- TLV(time weighted average) PEL - C (celllng exposure limit) hours). ENGINEERING CONTROL MEASURES Methods to control hazardous condilions are preferred. Methods include a good mechanical ventilation with a non sparking, grounded ventilation system exhausting directly to the outside, separate from other exhaust ventilation systems. Care

Exterior Facade Smart Materials And Technology

1254 words - 6 pages different responses. According to Jenny Love II, “the environmental conditions directly influenced by building envelope design that relates to comfort are temperature, humidity, light, sound, view, airflow, and air quality”. The main point that I plan to analyze is creating a double skin façade, which takes fresh air into the interior spaces of modern buildings. Many buildings control their ventilation mechanically. Most of the mechanical ventilation

Renaissance Woman Essay

1029 words - 5 pages mechanical shock to them would frequently break the lighted filament or even break the glass. They also created a lot of heat which needed cooling and ventilation. Imagine having to stop the ship or fleet to change a vacuum tube under a hull with scuba divers, or to work inside the very bottom of the hull of a ship to repair a circuit. Even the resistors and capacitors were relatively unreliable. The amplification equipment had to be accessible for