Dr Sahil Garg

Lactate is NOT just sepsis.

One of the most dangerous ICU habits is treating lactate like a diagnosis.

Because lactate is not a disease.

It’s a physiology signal.

An elevated lactate may reflect:
⚠️ hypoperfusion
⚠️ adrenergic stress
⚠️ seizures
⚠️ liver dysfunction
⚠️ mitochondrial failure
⚠️ beta agonist therapy
⚠️ impaired clearance

That’s why:
a patient can have high lactate…
without septic shock.

And a “falling lactate” does not always mean physiology is fixed either.

In critical care:
lactate is a story about metabolism,
oxygen utilization,
stress response,
and perfusion.

Not just infection.

Think in two categories:

TYPE A:
↓ Oxygen delivery / hypoperfusion

TYPE B:
Metabolic stress without tissue hypoxia

MD PEARL:
“Treat the physiology —
not the number alone.”

Because ICU medicine begins
when you stop reacting to numbers
and start understanding why they changed.

Save this before your next ICU shift.

@GasMACGrit | Anesthesia & ICU

#ICU #CriticalCare #Lactate #Shock #Perfusion #Sepsis #Hemodynamics #FOAMed #ICUlife #Anesthesia #Anaesthesia #CriticalCareMedicine #MedEd #GasMacgrit

4 months ago |[YT] | 0

Dr Sahil Garg

Urine output is a DELAYED vital sign.

One of the most dangerous ICU mistakes is assuming:
“the kidneys are fine because urine output looks okay.”

But physiology is smarter than that.

The kidneys can temporarily preserve urine production using:
• autoregulation
• RAAS activation
• vasoconstriction
• sodium & water retention

Meanwhile:
⚠️ tissue perfusion may already be failing
⚠️ lactate may already be rising
⚠️ microcirculation may already be collapsing

That’s why a patient can appear:
✅ “hemodynamically okay”
while shock silently progresses underneath.

Oliguria is often a LATE manifestation.

In critical care:
normal urine output does NOT automatically mean:
• adequate cardiac output
• good tissue perfusion
• stable oxygen delivery

Look beyond the urine bag.

Assess:
• lactate
• capillary refill
• skin temperature
• mentation
• peripheral perfusion
• hemodynamic trends

MD PEARL:
“The kidneys compensate long before shock becomes obvious.”

Because ICU medicine is:
understanding physiology before numbers collapse.

Save this ICU pearl before your next night shift.

@GasMACGrit | Anesthesia & ICU

#ICU #CriticalCare #Shock #Perfusion #Lactate #Hemodynamics #ICUlife #FOAMed #Anesthesia #Anaesthesia #CriticalCareMedicine #MedEd #ICUPearls #GasMACGrit

4 months ago |[YT] | 0

Dr Sahil Garg

Blood pressure can look normal…
while organs are still starving.

In ICU,
a “normal MAP” can create dangerous reassurance.

Because pressure is NOT the same as perfusion.

A patient may have:
✅ MAP > 65
…but still develop:
⚠️ elevated lactate
⚠️ cold extremities
⚠️ low urine output
⚠️ altered mentation
⚠️ tissue hypoxia

Why?

Because tissue oxygen delivery depends on:
• cardiac output
• microcirculation
• hemoglobin
• perfusion distribution
—not just arterial pressure.

MAP is only part of the story.

Remember:

MAP = CO × SVR

A vasoconstricted patient may maintain pressure…
while organ blood flow silently collapses.

That’s why ICU medicine is not about “good numbers.”
It’s about understanding physiology beneath the monitor.

MD PEARL:
“Pressure does not guarantee flow.”

Assess beyond the BP:
• lactate
• capillary refill
• skin temperature
• urine output
• mental status
• peripheral perfusion

Because shock is:
failure of oxygen delivery.

Not just hypotension.

Save this before your next ICU shift.

@GasMACGrit | Anesthesia & ICU

#ICU #CriticalCare #Anesthesia #Anaesthesia #FOAMed #MedEd #Shock #Perfusion #Lactate #Hemodynamics #ICUlife #CriticalCareMedicine #AnesthesiaResident #GasMACgrit

4 months ago |[YT] | 0

Dr Sahil Garg

SpO₂ is NOT Oxygen Delivery.

The monitor says:
“oxygenation looks fine.”

Physiology asks:
“Are the organs actually receiving oxygen?”

A pulse oximeter only measures:
how much hemoglobin is saturated.

It does NOT tell you:
• cardiac output
• tissue perfusion
• oxygen extraction
• microcirculation failure

That’s why a patient can have:
✅ SpO₂ 100%
…and still develop:
⚠️ shock
⚠️ lactate elevation
⚠️ tissue hypoxia
⚠️ organ dysfunction

Because oxygen delivery depends on:

DO₂ = CO × CaO₂

Which means:
oxygen delivery is not just saturation.

It also depends on:
• Hemoglobin
• Cardiac output
• Perfusion
• Oxygen utilization

In ICU:
numbers can reassure you…
while physiology silently collapses.

MD PEARL:
“SpO₂ measures saturation.
NOT perfusion.”

Remember the ICU mnemonic:
HOPS

H → Hemoglobin
O → Oxygen saturation
P → Pump (Cardiac Output)
S → Systemic perfusion

If ONE fails:
tissues suffer.

Even with SpO₂ 100%.

Save this before your next ICU shift.

@GasMACGrit | Anesthesia & ICU

#ICU #CriticalCare #Anesthesia #Anaesthesia #FOAMed #MedEd #ICUlife #Perfusion #Shock #Physiology #OxygenDelivery #Lactate #AnesthesiaResident #GasMACG

4 months ago |[YT] | 0

Dr Sahil Garg

Urine output is a DELAYED vital sign.

One of the most dangerous ICU mistakes is assuming:
“the kidneys are fine because urine output looks okay.”

But physiology is smarter than that.

The kidneys can temporarily preserve urine production using:
• autoregulation
• RAAS activation
• vasoconstriction
• sodium & water retention

Meanwhile:
⚠️ tissue perfusion may already be failing
⚠️ lactate may already be rising
⚠️ microcirculation may already be collapsing

That’s why a patient can appear:
✅ “hemodynamically okay”
while shock silently progresses underneath.

Oliguria is often a LATE manifestation.

In critical care:
normal urine output does NOT automatically mean:
• adequate cardiac output
• good tissue perfusion
• stable oxygen delivery

Look beyond the urine bag.

Assess:
• lactate
• capillary refill
• skin temperature
• mentation
• peripheral perfusion
• hemodynamic trends

MD PEARL:
“The kidneys compensate long before shock becomes obvious.”

Because ICU medicine is:
understanding physiology before numbers collapse.

Save this ICU pearl before your next night shift.

@GasMACGrit | Anesthesia & ICU

#ICU #CriticalCare #Shock #Perfusion #Lactate #Hemodynamics #ICUlife #FOAMed #Anesthesia #Anaesthesia #CriticalCareMedicine #MedEd #ICUPearls #GasMACGrit

4 months ago (edited) |[YT] | 0

Dr Sahil Garg

Behind every calm OT.
Behind every fighting ICU patient.
There is a nurse holding the line. 💙

Today, we honor the people who stay vigilant through every alarm, every crisis, and every long night shift.

To every nurse —
thank you for your compassion, resilience, precision, and strength.

You are the steady pulse of healthcare.

Happy International Nurses Day from GasMACGrit. 🩺

#InternationalNursesDay #NursesDay #ICUNurse #OTNurse #CriticalCare #Anaesthesia #AnesthesiaResident #ICU #Nursing #HealthcareHeroes #GasMACGrit #CriticalCareMedicine #MedInstagram #MedicalEducation #NurseLife

5 months ago |[YT] | 0

Dr Sahil Garg

Propofol gives one of the smoothest inductions in anesthesia…

But in the wrong patient,
it can collapse the circulation within seconds. 📉


So why does blood pressure fall after Propofol?


🧠 Propofol:
• causes arterial + venous vasodilation
• reduces sympathetic tone
• decreases systemic vascular resistance (SVR)
• may mildly depress myocardial function


👉 Result:
MAP drops rapidly after induction.


⚠️ Highest-risk patients:
• hypovolemia
• septic shock
• elderly patients
• cardiac dysfunction


💡 Clinical pearl:
The circulation dilates before the heart fails.


That’s why induction is physiology management — not just drug administration.


👇 What’s YOUR strategy for preventing Propofol hypotension?


#Anesthesia #Anaesthesia #Propofol #CriticalCare #ICU #AnesthesiaResident #FOAMed #MedicalEducation #MedEd #AirwayManagement #ClinicalPharmacology #MBBS #GasMACGri

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5 months ago |[YT] | 0

Dr Sahil Garg

Propofol smoothly puts patients to sleep…
but can cause intense burning pain before unconsciousness even begins. 💉🔥

Up to 70% of untreated patients experience pain during Propofol injection.

Why does it happen?

🧠 Propofol:
• Irritates free nerve endings
• Activates the kallikrein–kinin system
• Releases bradykinin
• Dilates veins → exposing more nerve endings → MORE pain

That’s why:
⚠️ Small hand veins hurt more than large antecubital veins.

💡 How anesthetists reduce the pain:
✅ Lidocaine pretreatment
✅ Larger IV veins
✅ Fast IV flow
✅ Mixing lidocaine with Propofol
✅ Venous occlusion technique

Remember:
The pain isn’t from the needle alone.
It’s from the drug itself.

👇 What’s YOUR favorite trick to reduce Propofol pain?

#Anaesthesia #Anesthesia #Propofol #ICU #FOAMed #MedicalEducation #AnesthesiaResident #CriticalCare #MBBS #OTLife #AirwayManagement #ClinicalPharmacology #MedEd #GasMACGrit

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5 months ago |[YT] | 0

Dr Sahil Garg

Hi everyone, welcome to my new YouTube Community. Now you can post on my channel too. To get started, tell me in a post what you'd like to see next on my channel.
Visit my Community: youtube.com/@gasMACgrit/community

5 months ago |[YT] | 0

Dr Sahil Garg

Induction is not routine. It’s a physiological gamble.

One drug drops BP.
The other shuts down cortisol.

And in the wrong patient - that choice can change everything. ⚠️

Propofol gives smooth induction, rapid recovery, and bronchodilation…
but can crash a hypovolemic patient in seconds.

Etomidate preserves hemodynamics and CPP…
but suppresses adrenal cortisol production for 24–48 hours.

💡 Clinical takeaway:
• Shock / trauma / cardiac compromise → Think Etomidate
• Stable patient / asthma / TIVA → Propofol works beautifully

🧠 Remember:
There is NO “best induction agent.”
Only the right drug for the right patient.

👇 What’s YOUR go-to agent in trauma induction?

💾 SAVE this for ICU postings, OT emergencies & viva revision.

#Anesthesia
#Anaesthesia
#Propofol
#Etomidate
#CriticalCare
#ICU
#AirwayManagement
#AnesthesiaResident
#FOAMed
#MedEd
#MBBS
#EmergencyMedicine
#TIVA
#MedicalEducation
#GasMACGrit

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5 months ago |[YT] | 0