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❤️🩺 WHY DOES THE HEART SLOW DOWN AFTER A SPINAL ANAESTHESIA?

Most people blame the spinal block itself... but the real mechanism is much more fascinating. 👀

As spinal anaesthesia causes sympathetic blockade, blood vessels dilate and venous return to the heart falls. An underfilled ventricle can trigger the Bezold–Jarisch Reflex, leading to a surge in vagal activity and a sudden drop in heart rate. 📉❤️

In higher blocks, the cardiac accelerator fibres (T1–T4) may also be blocked, removing sympathetic stimulation to the heart and worsening the bradycardia.

🔹 Reduced preload
🔹 Increased vagal tone
🔹 Cardioaccelerator fibre blockade
🔹 Bradycardia

Understanding the "WHY" behind spinal bradycardia can help you recognize danger before it becomes an emergency. 🚨

📌 Save this post for exams.
📌 Tag your anesthesia buddy.
📌 Share with your OR team.

Follow Mr medico blogs for more anesthesia concepts explained in the simplest way possible. 💉🫀

☄️ Asteroid hits Earth and 🌎 Humanity panics.⁣ ⁣

👨‍⚕️ Surgeon: “Anesthesia, can you explain this?”⁣ ⁣ 😂😂😂⁣ ⁣

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🫁AIRWAY ASSESSMENT MADE EASY! 🫁

Before every intubation, think 👉 LEMON 👈

L – Look Externally
E – Evaluate the 3-3-2 Rule
M – Mallampati Score
O – Obstruction
N – Neck Mobility

⚠️ Remember: LEMON predicts difficult laryngoscopy/intubation, not difficult mask ventilation.

💡 A quick airway assessment can help you anticipate challenges, prepare backup plans, and improve patient safety.

📚 Save this for your next OT posting, airway viva, or residency exam!
And follow Mr medico blogs for more anesthesia and icu content

Courtesy and credit: anesthesia_talk

🎭 When in doubt... blame anesthesia 💉

🔹 Case running late? → Anesthesia.
🔹 Room too cold? → Anesthesia.
🔹 Room too hot? → Also anesthesia.
🔹 Patient moved? → Anesthesia.
🔹 Patient didn't move? → Still anesthesia.
🔹 Monitor beeping? → Anesthesia.
🔹 Nobody knows what's going on? → Definitely anesthesia. 😅

Behind every successful surgery is an anesthesia team quietly managing the airway, vital signs, medications, emergencies, and everything in between—while somehow also being responsible for all the mysteries of the OR. 🤷‍♂️😂

👨‍⚕️ Tag your favorite anesthesia colleague who gets blamed for absolutely everything!

🚨 The Anesthesia Black Box: The Prone Position Nightmare 🚨

Spinal surgery requires the ultimate leap of faith. The patient is paralyzed, flipped completely face-down, and pinned into a frame. The surgeon gets a beautiful view of the spine. Anesthesia loses almost complete access to the airway, the face, and the chest.

Read this 3 min masterpiece here:
https://www.mrmedicoblogs.com/2026/06/prone-position-nightmare-spinal-surgery-airway-povl-anesthesia.html?m=1

It is the most terrifying setup in the OR.

⚠️ The Lost Airway: If the tube dislodges while the patient is bolted face-down, you will face difficulty to re-intubate. The team must un-drape and emergency-flip a heavy patient before hypoxic brain injury sets in.

⚠️ The Silent Blinder (POVL): pressure on the eye from the prone-pillow can cause a central retinal artery occlusion. Patients have woken up permanently blind.

⚠️ The Abdominal Crush: If the belly doesn't hang free, the IVC is compressed, forcing blood to engorge the epidural space. The surgeon complains of massive bleeding, while Anesthesia fights a plummeting cardiac output.

Dear Surgeons,

When you say:
“We’re almost done.”

Do you mean:
A) 5 minutes
B ) 30 minutes
C) One hour
D) Nobody knows

🧠 Why Does Hypotension Cause Nausea During Spinal Anesthesia? 🩺

We have all seen it in the OR: shortly after a successful spinal block, the patient's blood pressure drops, and suddenly they are complaining of severe nausea. But what is the exact physiological mechanism behind this?

Our latest high-yield flowchart breaks down the two primary pathways that link spinal-induced hypotension to the vomiting center.

Here is what is happening behind the scenes:

🧠 ,The Central Pathway (Cerebral Hypoperfusion):

Spinal anesthesia causes a sympathetic blockade, leading to arterial and venous vasodilation.
P,
This drops venous return and cardiac output, resulting in hypotension.

The sudden drop in blood pressure causes reduced cerebral and brainstem perfusion, which directly stimulates the Chemoreceptor Trigger Zone (CTZ) and the Vomiting Center, leading to nausea.

🩸 The Peripheral Pathway (Gut Ischemia):

Systemic hypotension also leads to reduced splanchnic blood flow.

This temporary gut hypoperfusion/ischemia triggers the release of serotonin and other emetogenic mediators from the GI tract.

These mediators stimulate vagal afferents, which travel back up to activate the Vomiting Center, triggering nausea and vomiting.

💡 Clinical Pearl: This dual-pathway mechanism is exactly why simply pushing an antiemetic (like ondansetron) might not fix the problem right away! The most effective, first-line "antiemetic" for spinal-induced nausea is rapidly correcting the underlying hypotension with vasopressors (like phenylephrine or ephedrine) and optimizing IV fluids. Treat the cause, not just the symptom!

📌 Save this physiological breakdown to your phone for your next clinical rotation, share it with your study group, and let's keep delivering safe, comfortable anesthesia! 🛡️

⏱️ Airway Assessment in 30 Seconds! 🩺

Whether you are systematically gathering patient data for a clinical research study or preparing for an emergency intubation, a standardized, highly organized approach is your best defense. Remember, airway disasters are often prediction failures, not skill failures.

Here is the ultimate 5-step airway check every provider should master:

👅 1. Mallampati Classification: Ask the patient to open their mouth and protrude their tongue. Classes I and II usually indicate an easy airway, while Classes III and IV signal increased difficulty.

📏 2. Mouth Opening: Assess the inter-incisor distance. An adequate space is >= 3 finger breadths (> 3 cm). Less than 3 finger breadths reduces the space for laryngoscope insertion and indicates a difficult airway risk.

📐 3. Thyromental Distance: Measure from the thyroid notch to the mentum with the patient's head fully extended. A distance of > 6.5 cm (about 3 fingers) usually indicates an easy intubation.

🔄 4. Neck Movement: Check the flexion and extension of the cervical spine. Good mobility facilitates better alignment of the oral, pharyngeal, and laryngeal axes.

🦷 5. Dentition: Always look for loose teeth, prominent incisors (buck teeth), removable dentures, or missing teeth. These factors can complicate laryngoscopy and significantly increase the risk of dental injury.

Predict. Prepare. Perform.

A difficult airway is significantly easier to manage when it is anticipated. Always formulate a primary and alternative plan and keep your rescue devices ready:

Plan A: First choice intubation

Plan B: Alternative technique

Plan C: Supraglottic airway device

Plan D: Face mask ventilation

Plan E: Emergency surgical airway

📌 Save this post for your next clinical rotation, and share it with your colleagues to help support our growing medical community! Let's keep delivering safe anesthesia for better outcomes.