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Wednesday, October 15, 2014

For doctors and paramedics, a brief about chest injury



Chest injury and breathing


Why is it important to understand Chest Trauma?

It is important to understand Chest Trauma since it affects both the breathing and Circulation in trauma patients

Is it a common problem and how significant is it in trauma?

It is very significant as it a common cause of death in trauma patients

Why is it relevant to me as I am not a cardio thoracic surgeon?

Chest trauma does not need surgery in majority of patients. Less than 10% patients need surgery in chest trauma. Majority of them need simple procedures such as giving oxygen, chest drain insertion etc which often saves a patient from dying.

Can you explain about chest trauma in simple terms so that i can understand?

We need to understand the anatomy to understand the chest injury and the different types of the injury

The injuries may not be obvious at first as normal chest x ray does not rule out chest trauma.  Hence it is essential to understand the physiology.

Explain to me in simple terms about the anatomy behind the chest trauma.

Essential anatomy:       1. Lungs with the airways and blood vessels with a cavity                                          around called pleural cavity

                                       2. Heart with a cavity around called peritoneal cavity

                                       3.  Mediastinum which has all the major vessels and the airways                                            and the oesophagus

        4. the chest is covered with bones [ribs and                                              clavicle], muscles [intercostal vessels] and separated from the abdomen by  diaphragm.

 How do i remember all this Anatomy when i see a patient and read a chest x ray

                                as simple as ABC…….

        1. A   Airway: Trachea

        2. B   Breathing: lungs, pleural cavity, chest wall

        3. C   Circulation: Heart, pericardial cavity, major vessels

        4. D   Diaphragm

        5. E   Everything else: includes Esophagus, Entered tubes & lines

Essential physiology

                                Chest has the gas exchange chamber

The chamber itself with the air in and the exhaust:     trachea and airways
the motor :                  Chest wall with the ribs, muscles and diaphragm
the current which is needed to operate the motor for gas                                        exchange chamber : the intercostal nerves  and the phrenic nerve

Chest has the main pump of the body namely the heart and the main vessels


how do i remember all this physiology when i am confronted with a patient

              As simple as what is taught in your MBBS

                                assess the patient with

                                Oxygen saturation : oxygen delivery to skin

                                alertness                :  oxygen delivery to brain and  CO2                clearance

                                Pulse              : heart rate

                                blood pressure  : heart output and resistance to the flow of blood

                                urine output   : heart function to keep the kidneys working well

I understand all this. Now tell me a way to assess and manage a patient with chest trauma.

                        When faced a patient with chest trauma, always and always
                                Go back to airway
                               
                                ensure a patient airway
                                       talk to the patient
                                       check his nose, mouth, teeth, tongue, throat and larynx      area are normal.
                                       make sure that his cervical spine is protected if injury cannot be excluded.

                                then follow what you have been taught at medical school

                                inspect
                                palpate
                                percuss
                                auscultate

                                and then measure

Inpect and palpate  for         breathless ness and tachypnoea

                                               open wounds and abnormal chest wall movements

                                               trachea position and neck swelling

                                               tenderness and crepitus
percuss and ausculate        resonance to percussion
               
                                               air entry

                                               heart sounds

measure and assess           Oxygen sauration
               
                                               pulse

                                               blood pressure

                                               and all parameters for shock including urine output
                                               be liberal with chest x ray

i have all done all the assessments as above, how do i manage the patient with chest injury

                                Identify life threatening injury and manage then and there

                                identify any non life threatening injury and come back to its management after completing the primary survey and management


Life threatening injuries

                                characterised by what you find in your assessment

                during inspection and palpation

                                1. air hunger and cyanosis
                                2. open chest wall wounds
                                3. abnormal chest wall movements
                                4. tracheal deviation

                during percussion and auscultation

                                absent breath sounds & either no or hyper resonant on percussion

                during measurement
               
                                low oxygen saturation

if you find any of these, patient may die with the following injuries if you do not act now

                Airway obstruciton

                tension pneumothorax

                open pneumothorax

                massive hemothorax

                cardiac tamponade
                                              
                flail chest

how do one recognise these conditions and how do i treat them as i detect them

airway obstruction       

        Diagnosis:                                            
        air hunger, cyanosis    
        stridor                                                                                 
        patient not talking and unable to talk                                                                                                                         
        Treatment: Oxygen, manual clearance, suction and secure airway

Tension pneumothorax
                       
        Diagnosis:
        Trachea deviated to one side                    
        Hyperresonant chest with no air entry                      
        Engorged veins and shock

        Treatment
                Airway first and
                needle decompression and                                                                          chest drain
               
Massive hemothorax
       
        Diagnosis:
        Engorged veins and shock
        Trachea deviated
        Dull chest and no air entry

        Treatment:
        Airway first and
        IV access and fluids and Blood transfusion
        ICD chest drain insertion
       
Open pneumothorax
       
        Diagnosis

        Open wound in chest
        Pneumothorax features

        Treatment
       
        Airway first and
        Three way dressing
        Chest drain insertion
       
Cardiac tamponade

        Diagnosis

        Engorged veins and shock
        Muffled heart sounds

Treatment
        Airway first and
        Needle drainage
        ECG monitoring

               
Flail chest
        Diagnosis:
        Paradoxical breathing
        With multiple rib fractures

Treatment
        Pain relief
        ICD
        Ready to intubate and internal splinting

Summary:

Chest trauma is common, can kill a patient if not recognized and treated promptly. Majority of treatment in chest trauma is ensuring a patent airway, oxygen, simple measures such as chest drain.

               
                       
                       


               




                               

Friday, March 28, 2014

Decision making part 4: maths and statistics in everyday life

Decision leads to actions.

"I decide to travel without seat belt while traveling in a car"

 Leads to

"I travel in a car without wearing a seat belt "


Hence understanding and helping decision making would help in guiding to get the appropriate action.

Yes!

  But this is not that simple

Reason is that we do not always act after decision making

For eg we may act without thinking.

Like throwing the banana skin on to the path rather than bin may be by reflex action.

This may be due to the fact that learning process of the action is due to the behavior one has acquired with the past experiences.

i.e  "He or she has always seen people throwing banana skin wayward without looking for the bin."

" never worn a seat belt while traveling in a car"

As you can see, in both of the above instances the action was not preceded with conscious decision making process.

Hence one should not jump to condemning ones actions as these could not have been his or decisions.

We often have to start looking into the behavior of the person which led to the decision making and or actions

For example, if people evade wearing helmet when riding a bike, it is the behaviour which is in question rather than the action itself. That is why punishing alone for not wearing helmet is not often effective.

One has to combine the law with modification of the behavior which leads to the person "evading helmet wearing."

In the examples above, the seat belt wearing and throwing the skin of the banana on to a path, were actions due to the past experiences, observing others' behaviors since childhood in the society one is brought up!

I will continue the blog theme with the understanding that the person who is willing to change, i.e he is prepared to change his behavior.

This is essential for change in ones actions.

(Note: My current  blog theme is not on Methods of changes in behavior itself as this needs to be discussed in detail separately)

For those who are prepared to change, wait for my next blog to go into the decision making tools.








Sunday, March 23, 2014

decision making part 3: maths and statistics for every day life

Decisions of us affect others

In turn affects us

Hence one should take extra caution when decisions are made even when not affecting us

Example

Suppose you are a sincere law abiding tax payer of the country.

You throw the banana skin after eating the banana carelessly on the road. One poor person falls and sustains injury and gets treatment at a government hospital.


Quite a few of so called educated and well to do persons do not care for the cleanliness of the communal areas they visit.

This increases the incidence of diseases in the community at large.

This increases the government spending on health indirectly causing the government to increase the taxes in general.

You end up paying taxes higher than you were paying in the past.

Hope this makes sense so far

Warm regards

Chockalingam

Tuesday, March 11, 2014

"decision making" . maths and statistics in our life part 2

Decision making of one becomes an issue for the other

It is logical and well known fact but do we really understand?

for example at home , if i decide to eat too much and be unhealthy, it affects me. only me?

no,  it also affects the people you love, since they are going to pick up the repercussions, agreed?

an example at work,  if one does the job very well at work, it impacts so many people who are receiving the fruitfulness of your work, agreed?

for instance in the community,  if one keeps the environment tidy and neat, it affects the health of others in a positive way, agreed?

when we are in our holiday, if we throw the banana skin carelessly, somebody else may trip over and get hurt, agreed?


one might say that these are well known facts. what is new?

decisions which affect others 

rather than us 

in turn affects us

how????????  wait for my next blog

only when you understand then we can move on to decision making and the tools one should rely for decision making

warm regards

Chockalingam