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An Introduction to
Intensive Care Medicine


All tutorials located on this site are the property of Patrick Neligan and are for personal study purposes only. They are not peer reviewed and no responsibility is taken for inaccuracies. These tutorials must not be reproduced without permission or used in any other publication.

What is intensive Care?

"A service for patients with potentially recoverable diseases who can benefit from more detailed observation and treatment than is generally available in the standard wards and departments."

Reasons why patients require intensive care:

1. Haemodynamic insufficiency

2. Respiratory insufficiency.

3. Deteriorating level of consciousness or coma.

4. Fluid and electrolyte imbalance

or the anticipation of one of the above.

The two key aspects of intensive care are:

1. Observation

2. Treatment.

Observation entails clinical assessment and both non-invasive and invasive monitoring.

Observation also includes data interpretation.

Treatment involves interventions; these have a specific purpose.

When asked to admit a patient to intensive care one must ask:

Why does this patient need to be in intensive care?

Are the observation and treatments available elsewhere?

Is recovery to ICU discharge a possibility?

Is admission appropriate?

Is admission to prolong life or prolong suffering?

The objective of Intensive Care Medicine is to manage the patient in such a way that he/she is in a position to be discharged to an ordinary ward. The therapies instiruted in ICU should see the patient through to discharge from the hospital.

Each day it is important to ask:

Does this patient still need to be in intensive care?

If so, why?

We need to identify the problems and assess what progress has been made to redress them.

"If the patient is not getting better, he is getting worse!"

As an intensive care doctor, your priorities are different.

While internal medicine can often be a specialty of deductive reasoning, taking the patient's history, reading clinical signs, making a differential diagnosis ranging from the blatantly obvious to the weird and wonderful, intensive care is about hard cold facts.

What is wrong with this patient?

What is the most likely cause? Common things are common.

What can be done to confirm this diagnosis? Best guess reasoning.

What is the most effective course of action?

Whilst internal medicine is about gathering background information, e.g. Family history, and using deductive reasoning, intensive care is about identifying problems and solving them system by system. The patient is not seen holistically as one body, rather, as a collection of organs, which need to be fixed one by one.

 

The problem orientated systems based approach:

When reviewing a medical patient, it is customary to use the S.O.A.P. routine:

S = Subjective: how the patient himself feels.

O = Objective: what you detect from history and clinical examination.

A = Analysis of data.

P = Plan of management.

This is an excellent system, and useful in a high dependency unit. It is not effective in intensive care.

The ICU approach:

1. Identify the patient: Name, Age, No of days in ICU, Primary Consultant.

2. Identify the admission problem and developments since admission.

3. Fill in the background problems. Medical history (relevant), ICU history to date.

4. Enumerate current problems.

5. Review the systems on the following basis:

Observation Intervention Impression [stable or unstable]

6. Record your overall clinical impression: improving, disimproving, static.

7. Plan of management for the current day.

There are nine systems that you need to review:

  1. Central Nervous System
  2. Cardiovascular System (including peripheral vascular system)
  3. Respiratory System
  4. GI tract and Nutritional Status
  5. Renal and metabolic (including electrolytes)
  6. Peripheries and Skin
  7. Endocrine System
  8. Haematology
  9. Microbiology and Sepsis Status

In addition it is essential that certain aspects of the patient's care is addressed daily:

1. The patient's psychological welfare.

2. The "minor electrolytes": phosphate, magnesium etc.

3. Is the patient tolerating enteral nutrition? If not are we tying promotility agents?

4. Are we using DVT prophylaxis?

5. Does this patient require stress ulcer prophylaxis? Not feeding, renal failure, burns.

6. Physiotherapy and mobilization.

7. Bronchodilation and mucolytics.

8. Pressure areas.

9. Unnecessary drugs, particularly antibiotics.

10. Are we weaning? Could we wean faster?

11. Are we missing anything?

12. How long are the lines in? Are they necessary (if not pull them!)? Do they need to be changed.

13. Do we anticipate a long haul? Is it time for a surgical airway?

14. Is there any prospect of this patient surviving? Are we prolonging suffering?

15. Have the primary care team anything new to offer.

16. Who is coming in to visit the patient?


ICU DAILY DOCTORS' RECORD

1. Name Age Days in ICU; Consultant

2. Admission Problem:

3. Developments since then:

4. Background: other medical problems - diabetes, hypertension, asthma etc.

5. Current Problems:

1, 2, 3, 4, 5 in order of importance

6. Systems review:

SYSTEM

OBSERVATION

INTERVENTION

CNS

GCS score or Awake Obeys Localizes Withdraws Unresponsive

Sedation

CVS

B/P Pulse CVP PAP etc. ECG Listen to chest, look for dependent oedema

Inotropes, Pacing

RS

Auscultate lung fields

Look at blood gases: FiO2 - PaO2 CXR - position of lines and ett

Assisted Ventilation

GIT / Nutrition

Palpate Abdomen, NG tube in situ

Enteral feed / TPN

Renal

Urinary output, Creat, Urea, Electrolytes Diuretics, Acid Base Status

Dialysis

Peripheries

Oedema, DVTs, Rashes, Pressure points

TEDS / minihep etc

Endocrine

Blood sugar, T4 / TSH

Insulin infusion

Haematology

Hb, platelets, INR, APTT, FDPs

Transfusion

Micro

Temp, WCC, Sputum scores, Urine

Antimicrobials

 

7. Clinical Impression:

8. Plan of Management:


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