Cardiac Output And The Fick Equation Explained: Deriving, Applying, And Understanding The FICK!

[@aimensami-o5w]

Please bring videos on all topics of all medical subjects cuz you are literally the best out there of all the lectures ive ever taken

[@WhiteboardMedicine]

We really appreciate such kind words and hope we can continue to live up to that! Thanks for checking out the video and for commenting!

[@achristo2010]

By far one of the best explanations I've seen. Only suggestions is that you provide a full example/samples for calculating.

[@WhiteboardMedicine]

Glad to hear that the video was helpful! And we appreciate the feedback! Great idea. We will keep that in mind for future videos!

[@njones182]

This is now the only explanation that matters! Excellent beyond measure!

[@WhiteboardMedicine]

Appreciate the kind words and glad it was helpful!! Thanks for checking it out!

[@cherylrajewski3390]

I am an RT student and found this video very helpful. Thank you for posting.

[@WhiteboardMedicine]

Love to hear that! Thanks for checking out the video and for the kind words! Have a mini series on ventilator scalars as well, if interested linked below: kzbin.info/aero/PLf5bMa9_tvRinTHdWwKFYBX7N5kfOBRHz&si=PgBIRUfUi_V39NQr

[@AA-ee7jm]

By far, my favorite lecture!! 10/10

[@WhiteboardMedicine]

So happy to hear it was helpful! Thanks for checking out the video and for the kind words!

[@eman5669]

great lecture out of all good lectures , just would like to say that 1.34 is constant for gram per Dl hemoglobin,to get it for Liter as COP is L per minute so we multiply this constant by 10 and it becomes 13.4 thanks again

[@j.rothchild173]

You are the best of the wild west!!

[@filipfedorek108]

Thank you for your great and detailed explanation. It was very helpful and I have a better understanding of the Fick's principle, which I struggled to grasp the concept of it.

[@WhiteboardMedicine]

Love to hear that! Thanks for checking out the video and for the kind words!

[@tiffanycampbell9562]

Hi! Thank you so much! It was quite clear and I understand better now! Much blessings from Jamaica :)

[@WhiteboardMedicine]

That’s great to hear! Thanks for checking out the video and for the kind words. We are glad it was helpful!

[@dominiquejohnson5234]

Great video, gives you everything you need to use Fick's equation. Would have liked to understand the conceptual basis of how fick's principle works a bit more. Still gives more than enough to use proffesionaly in real life or on an exam. Great job.

[@WhiteboardMedicine]

We appreciate you checking out the video and for commenting! Sounds like we may need to come out with a sequel to this video including the things you recommended!

[@davidmbeckmann]

Love hemodynamics. We use the NICOM device. It’s noninvasive cardiac output monitoring. Every hospital in the system has been given them. You have four, expensive, electrodes, each with two contact points. 2 are on the upper chest to the clavicle and 2 upper abdominal , really over the lower ribs. It senses the blood flow as a moving column of fluid across the chest, and through bioreactance and measuring phase shifts and then applying a proprietary formula, they can measure stroke volume. It’s dynamic... you use a passive leg raise or a fluid bolus and measure pre and post. If the fluid challenge raises the SV more than 10%, you are “ fluid responsive. “ and by putting in weight , height, HR and BP, the entire gamut of hemodynamics variables can be calculated. Well, back to the salt mines...almost 1/2 of my service is CoVid.

[@WhiteboardMedicine]

That device sounds super interesting! We do not have access to that type of non-invasive fluid assessment. We still have many patients, especially in the CICU, that we float Swans on! Goodness, sounds like the COVID numbers are really ticking up for you. Stay safe and they are in good hands!

[@IWC-t2b]

Good explanation!!! Only one small correction, that is, the SaO2 stands for the percentage of saturated hemoglobin.

[@他自己-d1k]

thx this was the part I didnt get your a life saver

[@pyromanaic21]

Exactly, though I will say that I have been taught to calculate the CaO2 and CvO2 with the partial pressure of dissolved oxygen too. the equation looks something like CaO2 = (SaO2*Hb*1.34) + (Pa02*0.003) and CvO2 = (SvO2*Hb*1.34) + (Pv02*0.003)

[@B3AUTiFULSARCASM]

Yes, it is the % saturation of hemoglobin in arterial blood.

[@leonidgerasimov8387]

You're a life saver! Thank you so much!

[@WhiteboardMedicine]

Absolutely! Glad it was helpful!

[@JJtheRT]

Do you have a reference for the 125 or 110 mL O2/min consumed?

[@jvictoraa]

Hello, I love your channel and watch several videos. Would you help me? A 50-year-old patient with BSA 2.04, SVcO2 93%, SaO2 100%, Hgb 7.1 g/dl, without intracardiac shunts, but anesthetized. Why is the result so absurd? My result would be 38 liters! Where is the error?

[@sovereign775]

One point of confusion is the 1.32 constant. You mentioned going from ml to dl it would be 13.2 but the conversion from ml to dl would be 0.0132.

[@ivankim4771]

The 1.34* constant. The real reason he is multiplying by ten is because the units of hemoglobin (g/dL) need to be changed to (g/L).

[@naaengmann2117]

so helpful

[@WhiteboardMedicine]

So glad to hear it! We appreciate you checking out the video!

[@291ayl]

You do realize that your numerator is a MAJOR approximation unless you measure what the patient is inspiring then expiring and then getting the difference... you could also calculate by getting a dlco, but otherwise your just guessing what the lung capillary interface is doing, and I won't even get into other inaccuracies in the equation based on patient state.

[@WhiteboardMedicine]

You are absolutely correct! This is the number utilized in this equation when one calculates it clinically, but it is an absolute gross approximation with many many limitations. We could have done a better job of pointing that out. Thanks for the comment!

[@akbarherekar]

Good attempt. Sao2 and SvO2 in this equation are Saturation and not dissolved oxygen.

[@Blackeagleglef2]

Actually I think it is a very good explanation, but there are some affirmations that arent true. CaO2= CaO2=(1.34 X Hgb X SaO2) + (0.003 X PaO2). 100% saturated Hg transports 1.34 mL of Oxygen, If PaO2 is not enought to keep Hg 100% saturated, then it would carry the porcentage of maximun Oxygen. Dissolved Oxygen its almoste depreciable, but correspond to the second part of the equation, 0.003xPaO2 thats disolved O2 in plasma

[@Blackeagleglef2]

I ask excuses for my english, as it is not my first language