NephroPOCUS Profile picture
11 Nov, 10 tweets, 9 min read
#Nephrology consult for worsening creatinine in the context of diuresis in a patient with #heartfailure
Documented weight 3 kg ⬇️ than the previous day. No accurate urine output. Pt feels OK (has some unrelated issue).
Question: over diuresis?
#POCUS #MedEd #VExUS see thread 👇
So, there is decreased LV systolic function and obviously diastolic dysfunction. Bi atrial enlargement. No significant pericardial effusion (there was trace on PLAX).
Next step in the hemodynamic circuit #POCUS assessment?
btw repeat weight was similar.
Next: IVC #POCUS assessment to assess right atrial pressure.
Here it is 👇
Big and plethoric (take it as 15 mmHg in a spontaneously breathing person - we get RVSP of ~41 mmHg based on the above tricuspid gradient)
Is it always big? did it get better from yesterday by any chance?
Need to do #VExUS to know how the organs are feeling congestion.
Start with #VExUSlite of hepatic 👇
red-blue-red-blue 😢
PW #Doppler of hepatic vein
As expected, D-only pattern: systolic flow reversal and venous return only during diastole. Finally have EKG (though gain not optimized)
Now #POCUS #VExUSlite of portal vein
[first you'll see hepatic veins and the clip transitions to portal]
Am I seeing some blue color? then its not good....(systolic flow reversal). Let's confirm it in PW mode
100% pulsatile with systolic flow reversal as expected. Note that the reversal corresponds to the little blue sparkle seen on color #POCUS
Now its intra-renal vein's turn #VExUS
Clear monophasic (diastole-only) flow pattern
Even that diastolic flow is little unlike the recent case we saw where it was spanning throughout the diastole.
That means the venous stasis index is very low = severe congestion
What should we do now? fluids because the weight dropped? 🙄
Point I'm making: #POCUS #VExUS (= physical examination) is very important in day-to-day #nephrology & any specialty. Why rely on indirect methods when you can see the anatomy at patient's bedside without radiation 🤦
In this case, repeat weight was almost unchanged - so the previous weight was likely wrong. Another interesting point.
Cc some #VExUS allies @khaycock2 @ThinkingCC @ArgaizR @katiewiskar @OKiamanesh @Scottiedoc1 @BillyBam28er @DrBaudy @KalagaraHari

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More from @NephroP

25 Aug
#POCUS #IMPOCUS
Understanding #VExUS from scratch:
A mini #tweetorial on normal hepatic vein waveform genesis 👇 #MedEd #echofirst

1/ Understanding color and direction
2/ What is S wave? #POCUS
3/ V wave #POCUS
Read 8 tweets
18 Aug
#POCUS Intra-renal vein Doppler waveform looking exactly like that of hepatic vein!
#VExUS obtained from a #nephrology clinic patient with pulmonary hypertension. #MedEd
Normal hepatic vein waveform #POCUS Image
Portal vein #POCUS in this patient - increased pulsatility. Image
Read 6 tweets
11 Jul
@Thind888 @FH_Verbrugge @khaycock2 Dear hemodynamic masters, saw a cirrhotic pt with oliguria (relatively preserved Scr) & pulmonary congestion. Based on these findings, suggested norepinephrine (pressors). Agree? any educational input appreciated.
Basically I interpreted as high output cardiac failure with elevated filling pressures leading to pulmonary congestion.
This tracing I believe is right intra-renal 'arterial' with diminished diastolic flow. Correct me if I'm wrong.
Sorry, didn't realize that the scale dropped
Read 4 tweets
18 Jun
1/ #Nephrology #POCUS case study:
Dr. X is rounding on an ESRD pt who initially presented with dyspnea after missing a dialysis (HD) session; underwent dialysis in the hospital. Pt asymptomatic at the time of exam and lung #ultrasound revealed 👇 Further story in thread #MedEd
2/ Based on the 2-zone lung #POCUS, Dr. X orders for another session of HD. Notably, pt says he is at his 'dry weight' and HD nurse says they could only get 1.5L off during first session. Dr. X doesn't change his/her mind.
Info on various lung scan zones👇
3/ Patient becomes hypotensive during HD and only ~500cc fluid could be removed.
Why can't we get more fluid out of a hypervolemic patient? Dr. X is perplexed and decides to more #POCUS Here is the IVC
Read 16 tweets
15 Jun
#POCUS #echofirst The correct answer is dilated coronary sinus [48% got it right (of 229 votes)]. From #IMPOCUS standpoint, 2 main causes: persistent left superior vena cava and pulmonary HTN. This pt had the former. Normal anatomy of the coronary sinus (Read #thread)👇 #MedEd
More anatomy: 3D CT angio
We need to understand the anatomy first to understand #pocus orientation
Original image shows the typical location of CS in PLAX view. Don't confuse with descending aorta. You can also see CS from the apical window. From apical 4C, tilt the transducer posterior (in the opposite direction as you would for the 5-chamber view) #POCUS
Read 7 tweets
9 Jun
#POCUS teaching case: #Dialysis patient c/o sob, reports weight gain. BP low to begin with (~100-110 mmHg systolic) & drops further during ultrafiltration. Dr. X performs IVC #ultrasound at the bedside and sees this 👇 - probably volume depleted? See #thread
#MedEd #nephrology
2/ Dr. X orders to stop ultrafiltration. BP stabilized a little bit.
All done?
Wait, something doesn't make sense. Why did the patient gain weight? (usually #dialysis patients know their dry weight well). Why sob?
In the meanwhile, radiology tech performs chest #X-ray 👇
3/ That's not good. Diagnosis is apparent but lets get Dr. Y who does more than just IVC #POCUS
Subcostal view 👇
Significant pericardial effusion
Read 12 tweets

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