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This will be used as part of your Personal Professional Portfolio once graded.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2. INTRODUCTION
A ventilator is a machine which is
designed to mechanically move
breathable air into and out of the
lungs, to provide the mechanism of
breathing for a patient who is
physically not able to breathe
sufficiently.
3.
4. VENTILATION
It is a method of controlling the
environment with the
air , and can be defined as
the movement of air
between the environment
and lungs via inhalation
and exhalation.
5.
6. HISTORY OF VENTILATORS
The early history of mechanical ventilation
begins with various versions of what was
eventually called the ‘iron lung’, a form of
non-invasive negative pressure ventilator
which was widely used in the Polio
epidemics in the 20th century after the
introduction of ‘Drinker respirator’, in
1928, and the subsequent improvements
introduced by John Haven Emerson in
1931.
7.
8. LIFE CRITICAL SYSTEM
As the failure of a mechanical ventilator may
result in death, it is classed as a life-critical
system, and precautions must be taken to
ensure that these systems are highly reliable,
This includes their power-supply provision.
They may have manual backup mechanism to
enable hand – driven respiration in the absence
of power.
They may also have safety valves which open to
atmosphere during power-cut.
Other modification can be gas tanks, air
compresssor, backup batteries, etc.
9. SOME TERMINOLOGIES
DEAD SPACE:- Mechanical dead space is
the volume of gas breathed again as the
result of use in a mechanical device.
WEANING:- It is the timing of withdrawal
of ventilation.
10. Need of Ventilator
In anaesthesia (as a component of an
anaesthesia machine).
Home care in hypoventilated patients.
Emergency medicine.
Intensive care medicine.
11. Indications
1. Acute lung injury.
2. Acute severe asthma, requiring intubation.
3. Chronic Obstructive Pulmonary Disease.
4. Apnea with respiratory arrest.
5. Hypoxemia.
6. Acute respiratory acidosis.
7. Respiratory distress addressing increased work
of breathing.
8. Hypotension including sepsis, shock, CHF.
9. Neurological conditions such as Muscular
Dystrophy, Amyotropic Lateral Sclerosis, etc.
12. TYPES OF VENTILATOR
1. TRANSPORT VENTILATOR :- These are
small and more rugged, and can be
powered pneumatically or via AC or DC
power sources.
13. 2. INTENSIVE CARE VENTILATOR :- These are larger
and usually run on AC power(though virtually all
contain a battery to facilitate intra-facility
transport and as a back-up in the event of a
power failure). It provides greater control of a
wide variety of parameters. Many ICU ventilators
also provide visual feedback of each breathe
through graphics.
15. 3. NEONATAL VENTILATOR :- These are designed
with the preterm neonate in mind, and are a
specialized subset of ICU ventilators that are
designed to deliver the smaller, more precise
volumes and pressures required to ventilate such
patients.
18. 4. POSITIVE AIRWAY PRESSURE VENTILATOR :-These
are specifically designed for non-invasive
ventilator, and can also be used at home, e.g, for
treating sleep apnea or COPD.
• It works by increasing the patient’s airway
pressure through an endotracheal or
tracheostomy tube.
• The positive pressure allows the air to flow
into the airway until the ventilator breathe is
terminated.
• Then the pressure drops to ‘0’ and the elastic
recoil of the lungs and chest wall push the
tidal volume- breathe out through passive
exhalation.
19. 5. NEGATIVE AIRWAY PRESSURE VENTILATOR :- Here
the air is withdrawn mechanically to produce a
vacuum inside the tank, thus creating negative
pressure; which in turn leads to expansion of the
chest.
•It leads to decrease in intra-pulmonary
pressure, and increases flow of ambient air
into the lungs.
•As the vacuum is released, the pressure
inside the tank equalises the ambient air
pressure.
•The elastic coil of the chest and lungs thus
leads to passive exhalation.
20. 6. HIGH FREQUENCY VENTILATOR :- Frequency is
from 60/min upto even 3000/min.
It is of two types-
a) Jets:- It uses natural elastic recoil of the lungs,
where expiration occurs passively.
It consists of a applying high pressure jet to the
airways via a cannula or endotracheal tube.
b) Oscillators:- It uses a reciprocating piston which
aid expiration on its return stroke. Here expiration is
active.
21. Differential Ventilation
When a person has bilateral lung pathology,
then this type of ventilation is used where two
synchronised ventilators are used
simultaneously.
It prevents ventilation -to- perfusion mismatch.
Treatment cost is expensive as two ventilators
are required in one set-up.
24. APPLICATION AND DURATION OF VENTILATION
It can be used as a short-term
measure, for e.g, during an operation or
critical illness.
Long-term ventilatory assistance are
required in chronic illness, and may be
used at home, or in a nursing or
rehabilitation center.
25. In positive pressure ventilator, additional
measures can be required to secure airway. The
common employed method is intubation which
provides clear route for the air.
In negative pressure or non-invasive
ventilator, there is no need to use any adjunct.
29. CRITERIA FOR CHOOSING A VENTILATOR
It mainly depends upon the clinical condition of
the patient on presentation, diagnosis, patient’s
respiratory drive, the compliance of lungs and the
chest wall, and the degree of synchronization.
Other factors can be familiarity of the staff with
the equipment and the availability of the
equipment.
30. FACTORS TO BE OBSERVED IN CASE OF VENTILATION
Vital Signs.
Oxygen Saturation in the blood.
Consciousness of the Patient.
Checks alarm function of the ventilator.
Secretions should be removed periodically.
31. SETTING UP THE VENTILATOR
Vital signs- Pulse, Blood Pressure, Respiratory
Rate, Heart Rate.
Ensure adequate sedations, opioids and muscle
relaxants.
Tidal volume- 10ml/kg body weight.
Fraction of inspired oxygen: Usually 100%
oxygen to start there decreases slow.
Ensure the airway is secure.
36. MODES OF VENTILATOR
I. Control.
II. Assist/Trigger.
III. Intermittent Mandatory Ventilation.
IV. Mandatory Minute Volume.
V. Continuous Positive Airways Pressure.
37. PHASES OF VENTILATOR
I. Inspiratory Phase.
II. Cycling, or changeover, to expiration.
III. Expiratory Phase.
IV. Cycling to inspiration.
38. FUNCTION OF A VENTILATOR
The air reservoir is pneumatically compressed several
times a minute to deliver room air, or an air/oxygen
mixture to the patient.
A turbine pushes the air through ventilator, with a
flow valve adjusting pressure to meet patient-specific
parameters.
When over-pressure is released, patient will exhale
passively due to the lung’s elasticity, through a one-
way valve within the patient-circuit, called patient
manifold.
43. ADVANTAGES OF VENTILATOR
Better gas distribution.
Lower mean airway pressure.
Less Hemodynamic disturbance.
Less sedation is required.
Weaning is easier (in most of the cases).
44. COMPLICATIONS OF VENTILATOR
Barotrauma, including pneumothorax,
pneumomediastinum, pneumoperitoneum and
subcutaneous emphysema.
Ventilator associated lung injury.
Motility of mucocilia in the airways.
Ventilator associated pneumonia.
Oxygen toxicity.
Atrophy of Diaphragm or all respiratory
muscles.
Decreased Cardiac Output.
45. Fluid retention.
Aspiration.
Laryngeal or tracheal stenosis.
Cricoid abscess.
High or low PaO2.
GI bleeding.
Thick secretions.
Hepatic congestion.
Decreased renal perfusion.
Respiratory acidosis or alkalosis.
Vagal secretions.
Anxiety or fear.
Patient’s discomfort
Stress ulcer.
46. Plan of care for Ventilated Patients
To provide effective breathing pattern to the
patient.
To ensure adequate gas exchange.
Maintain nutritional status to achieve body
needs of the patient.
To prevent pulmonary, circulatory or bed-
rest complications.
Patient and/or family will indicate the
understanding of the purpose for mechanical
ventilation.
47.
48. PHYSIOTHERAPY MANAGEMENT IN VENTILATED
PATIENT
ICU survivors may suffer from muscle weakness,
physical disability, and cognitive problems lasting upto
5years. These critically ill patients may show muscle
wasting in the very first week of illness, with more
severity in patients with multiorgan failure.
Physiotherapy has been recommended by scientific
societies as a main component in the management of
such patients.
It is aimed at improving quality of life and preventing
ICU-associated problems, e.g-ventilator dependency,
cardiac deconditioning, etc.
49. EARLY MOBILIZATION
It can also be performed in
sedated or unconscious
patients.
Protocols include-
semirecumbent
positioning with the
head positioned at
45degrees, frequent changes in postures, daily
sessions of joint passive movement, and
passive bed cycling and electrical stimulation.
50.
51. MANAGEMENT OF AIRWAY SECRETIONS
Immobilised patients may suffer from
atelectasis, impaired cough mechanism,
inability to expel secretions, weakness to
expiratory muscles, etc. So, helping airway
clearance in these patients is necessary.
POSTURAL DRAINAGE: It includes gravity-
assisted positions, deep breathing exercise,
chest clapping, shaking or vibration, and
incentivized cough to move secretions toward
the upper airways.
54. INSUFFLATION-EXUFFLATION
Cough assists such as a mechanical
insufflator/exsufflator clears secretions by
gradually applying a positive pressure to the
airway then rapidly shifts to negative pressure,
producing a high expiratory flow.
By contrast, direct tracheal suction applies
negative pressure to a small, localized area.
55. ROTATIONAL THERAPY
Continuous rotational therapy uses special beds
to turn patients along the longitudinal axis up to
60degrees on each side, with preset degree and
speed of rotation.
It can reduce the risk of sequential airway closure
and pulmonary atelectasis, resulting in reduction
of the incidence rate of lower respiratory tract
infection and pneumonia, and the duration of
endotracheal intubation and length of hospital
stay.
56. REFERENCES
Wikipedia.
Cash’s textbook of chest, heart and vascular disorders for
Physiotherapy by Patricia A. Downie.
Textbook of Physiotherapy for Cardio-respiratory, Cardiac
and Thoracic Surgery Conditions by GB Madhuri.
Physiotherapy for Respiratory& Cardiac Problems by
Jennifer A. Pryor and S. Ammani Prasad.
www.respiratoryupdate.com
micunursing.com
www.rtmagazine.com
www.slideshare.net
www.sciencedirect.net