Summary

Question 1

Hi Dr what level does the patients oxygen saturations need to fall below before they start to turn blue

Answer 1

80 to 85%

Question 2

What formula is used to calculate the oxygen saturation

Answer 2

The formula to calculate oxygen SATs is oxyhaemoglobin concentration divided by oxyhaemoglobin concentration plus deoxyhemoglobin concentration x 100

Question 3

Hi Dr what is the Isobestic point

Answer 3

Ok so the isobestic point is the wavelength at which the absorption of deoxyhemoglobin and oxyhaemoglobin is identical

Question 4

Hi Dr I read it that a pulse oximeter works by omitting to wavelengths of light do you know which wavelengths of light

Answer 4

660nm which is red light and 940nm which is infrared light

Question 5

Hi Dr I have read that if a patient is too cold you may not get an accurate reading on the Pulse oximeter why

Answer 5

This is because if you are too cold your blood vessels constrict

Question 6

Hi Dr I have read that if you have carbon monoxide poisoning this wouldn’t be detected as low oxygen SATs on a pulse oximeter why

Answer 6

Carboxyhemoglobin has the same absorption spectrum at 6 690 as oxy haemoglobin so the oxygen that will detect it’s as if it was oxygen

Question 7

Hi Dr what blood pressure reading would indicate a low blood pressure

Answer 7

A systolic blood pressure of less than 90 mm Mercury

Question 8

Hi Dr I have heard that there is another way to identify if a patient has low blood pressure other than using the systolic blood pressure reading do you know what it is

Answer 8

If there mean arterial pressure falls below 65 mm Mercury

Question 9

Hi Dr I was carrying out an a to E assessment and got stuck on what to do if the patients GCS score is less than 8. What should you do

Answer 9

Ok so got a Glasgow Coma score of less than 8 means they’re not responsive so you need to put them in the recovery position and check their Airways then check blood glucose

Question 10

Hi Dr in an a to E assessment if the patients lactate level is greater than four millimoles per litre is this a good time to call for help

Answer 10

Yes

Question 11

Hi Dr what score does a patient need to receive on the modified early Warning score in order to be reviewed by a doctor

Answer 11

3

Question 12

Hi Dr how do you calculate the oxygen content of blood in millilitres per 100ml of blood

Answer 12

So first you need to calculate the haemoglobin x 1.34 x oxygen SATs ÷ 100

Then you need to add the oxygen concentration in the arteries in kilopascals and X 0.0225

Question 13

Hi Dr how do you calculate the oxygen delivery in the blood

Answer 13

Cardiac output x the oxygen content of the blood

Question 14

Hi Dr what is the mortality rate of sepsis

Answer 14

35%

Question 15

Hi Dr I heard that there was a bedside tests that kind of sounds like a chair to quickly identify sepsis
Can you remember what it was called

Answer 15

Q sofa

Question 16

Hi Dr do you know what the Q sofa score actually looks for in a patient

Answer 16

B&Q service score looks for alteration in mental status systolic blood pressure of less than or equal to a hundred and the respiratory rate of greater than or equal to 22 beats per minute