Razib Ahmed Raj

Razib Ahmed Raj I am a simple man.

# 🩸 BLOOD COMPONENTS OVERVIEW # # 1. Packed Red Blood Cells (PRBC))**🔬 Composition*** Concentrated **red blood cells***...
30/04/2026

# 🩸 BLOOD COMPONENTS OVERVIEW

# # 1. Packed Red Blood Cells (PRBC)
)

**🔬 Composition**

* Concentrated **red blood cells**
* Hematocrit ~60–70%
* Minimal plasma

**🌡️ Storage Temperature**

* **2–6°C (refrigerator)**

**⏳ Shelf Life**

* **35–42 days** (depends on preservative solution)

**💉 When to Use**

* Acute blood loss (hemorrhage)
* Severe anemia (Hb

🏥 ICU Viva – Basic Questions & Answers🔹 ICU কী?ICU (Intensive Care Unit) হলো এমন একটি বিশেষ বিভাগ যেখানে গুরুতর অসুস্থ র...
29/04/2026

🏥 ICU Viva – Basic Questions & Answers
🔹 ICU কী?
ICU (Intensive Care Unit) হলো এমন একটি বিশেষ বিভাগ যেখানে গুরুতর অসুস্থ রোগীদের ২৪ ঘণ্টা নিবিড় পর্যবেক্ষণ ও চিকিৎসা দেওয়া হয়।
🔹 ICU তে কোন ধরনের রোগী রাখা হয়?
Critical condition patient
Post-operative patient
Severe infection / sepsis
Trauma patient
Respiratory failure patient
🔹 ICU তে কী কী যন্ত্র ব্যবহার হয়?
Ventilator
Cardiac monitor
Infusion pump
Defibrillator
Haemodialysis
🔹 Ventilator কী?
Mechanical Ventilator এমন একটি যন্ত্র যা রোগীর শ্বাস-প্রশ্বাসে সাহায্য করে।
🔹 Patient Monitor কী কাজ করে?
Patient Monitor রোগীর vital signs (BP, pulse, oxygen saturation, ECG) পর্যবেক্ষণ করে।
🔹 ICU তে vital signs কী কী?
Temperature
Pulse
Respiration
Blood Pressure
Oxygen saturation
🔹 Oxygen therapy কেন দেওয়া হয়?
রোগীর শরীরে পর্যাপ্ত অক্সিজেন সরবরাহ নিশ্চিত করতে।
🔹 CPR কী?
Cardiopulmonary Resuscitation হলো হৃদযন্ত্র ও শ্বাস বন্ধ হয়ে গেলে জীবন রক্ষার জরুরি পদ্ধতি।
🔹 Infection control কেন গুরুত্বপূর্ণ?
ICU তে রোগীদের রোগ প্রতিরোধ ক্ষমতা কম থাকে, তাই infection spread ঠেকাতে strict hygiene maintain করতে হয়।
🔹 Nurse-এর ভূমিকা ICU তে কী?
Continuous monitoring
Medication administration
Patient care
Emergency response

👉 “ICU viva প্রস্তুতি নিচ্ছেন? এই basic প্রশ্নগুলো আপনার জন্য must-know! 🏥💉”
゚

𝐇𝐞𝐚𝐭 𝐚𝐧𝐝 𝐌𝐨𝐢𝐬𝐭𝐮𝐫𝐞 𝐄𝐱𝐜𝐡𝐚𝐧𝐠𝐞𝐫𝐬 (𝐇𝐌𝐄) 𝐅𝐢𝐥𝐭𝐞𝐫Heat and Moisture Exchangers (HME) are devices used in mechanically ventilated...
28/04/2026

𝐇𝐞𝐚𝐭 𝐚𝐧𝐝 𝐌𝐨𝐢𝐬𝐭𝐮𝐫𝐞 𝐄𝐱𝐜𝐡𝐚𝐧𝐠𝐞𝐫𝐬 (𝐇𝐌𝐄) 𝐅𝐢𝐥𝐭𝐞𝐫

Heat and Moisture Exchangers (HME) are devices used in mechanically ventilated patients intended to help prevent complications due to "drying of the respiratory mucosa, such as mucus plugging and endotracheal tube (ETT) occlusion." HMEs are one type of commercial humidification system, which also include non-heated-wire humidifiers and heated-wire humidifiers. An HME cassette plays a central part of lung rehabilitation after a total laryngectomy.
HME cassettes with an electrostatic filter are designed to enhance the protection against airborne microbes to help to reduce the transfer of viruses and bacteria. Wearing an HME cassette does not compensate for the loss of upper airway filtration of smaller particles such as bacteria and viruses; the pores of the HME filter are larger than the diameter of the infectious particles. Only larger particles are filtered by the HME.

Properties:
• The basic components of heat and moisture exchangers are foam, paper, or a substance which acts as a condensation and absorption surface.
• The material is often impregnated with hygroscopic salts such as calcium chloride, to enhance the water-retaining capacity. HMEs used for laryngectomees are mostly hygroscopic.
• HMEs can vary in size but they are designed to fit all adhesives or other attachment devices within a certain product line.
• HME cassettes for tracheotomy patients vary in size and are usually a bit larger than for laryngectomy patients.
• Air openings are at the side or at the front of the HME. Some designs use crossbars to prevent clothing from blocking. Usually a rim on the lid helps to find the correct finger position for occlusion.

Criteria:
• Designed with better inlet air quality.
• Designed to prevent cross contamination and protection of the operator.
• Efficiency 99% for 0.3 micron.
• Connector 22mm ID and 22/15mm

Types:
Two main types of filter exist:
• Pleated: resin-bonded ceramic or glass fibres in a densely packed, pleated sheet. Also known as hydrophobic filters as they do not absorb water.
• Electrostatic: flat layer of electrostatically charged material, with lower fibre density than pleated filters.
o In vitro evidence suggests that pleated filters are more effective at preventing transmission of water-borne pathogens (e.g. hepatitis C); because circle systems often contain condensation their use with electrostatic filters is not recommended.
o Filtration efficiency varies non-linearly with particle size; most modern filters are minimally efficient at particle sizes

🚑 IMPORTANT ICU INJECTIONS & THEIR USESLife-saving drugs used in emergency & critical care settingsAdrenaline – Cardiac ...
26/04/2026

🚑 IMPORTANT ICU INJECTIONS & THEIR USES

Life-saving drugs used in emergency & critical care settings

Adrenaline – Cardiac arrest, anaphylaxis
Atropine – Bradycardia
Dopamine – Shock, hypotension
Noradrenaline – Septic shock (first-line vasopressor)
Dobutamine – Heart failure, cardiogenic shock
Furosemide – Pulmonary edema
Hydrocortisone – Adrenal crisis, refractory shock
Insulin – DKA, hyperkalemia
Calcium gluconate – Hyperkalemia, hypocalcemia
Magnesium sulfate – Torsades de pointes, eclampsia
Diazepam – Seizures, status epilepticus
Midazolam – ICU sedation
Morphine – Severe pain, MI
Naloxone – Opioid overdose
Sodium bicarbonate – Metabolic acidosis, overdose
🧠 Quick Memory Line

“ABCD → Airway, Breathing, Circulation, Drugs save lives”

📚🫀 When & How to Start Antihypertensive Drugs – Quick Clinical Guide🧠 Why Start Treatment?Treating hypertension reduces ...
22/04/2026

📚🫀 When & How to Start Antihypertensive Drugs – Quick Clinical Guide

🧠 Why Start Treatment?
Treating hypertension reduces the risk of stroke, myocardial infarction, heart failure, and chronic kidney disease.

---

⚠️ When to Start Antihypertensive Drugs

1️⃣ Stage 1 Hypertension
• BP 140–159 / 90–99 mmHg
• Start lifestyle modification first
• Add drugs if:
– High cardiovascular risk
– Diabetes / CKD
– Target organ damage

2️⃣ Stage 2 Hypertension
• BP ≥160 / ≥100 mmHg
• Start antihypertensive drugs immediately + lifestyle changes

3️⃣ Very High BP
• BP ≥180 / ≥120 mmHg
• Evaluate for hypertensive emergency
• Requires urgent management

---

💊 First-Line Antihypertensive Drug Classes

1️⃣ ACE Inhibitors
• Example: Enalapril, Ramipril
• Preferred in diabetes, CKD

2️⃣ ARBs
• Example: Losartan, Valsartan
• Alternative if ACE inhibitor not tolerated

3️⃣ Calcium Channel Blockers (CCB)
• Example: Amlodipine
• Very effective in elderly patients

4️⃣ Thiazide Diuretics
• Example: Hydrochlorothiazide, Chlorthalidone

---

📊 General Treatment Strategy

• Start with ONE drug in most patients
• If BP uncontrolled → increase dose or add second drug
• If still uncontrolled → combination therapy (2–3 drugs)

---

🧂 Lifestyle Measures (Always Important)
• Reduce salt intake
• Maintain healthy weight
• Regular physical activity
• Limit alcohol
• Stop smoking

---

💡 Clinical Tip
Aim for target BP

আমি দৌড়াচ্ছি অসমাপ্ত চাহিদার পিছনে এক শূন্যতায় থেকে আরেক শূন্যতায় ভেবেছিলাম একদিন পূর্ণ হবে ভেবেছিলাম একদিন সব পাওয...
29/03/2026

আমি দৌড়াচ্ছি অসমাপ্ত চাহিদার পিছনে
এক শূন্যতায় থেকে আরেক শূন্যতায়
ভেবেছিলাম একদিন পূর্ণ হবে
ভেবেছিলাম একদিন সব পাওয়া হবে
কিন্তু আজ আয়নার সামনে দাঁড়িয়ে দেখি
আমি ফাঁকা আমার ভিতরের শূন্যতার গর্জন
যা কিছু জড়ো করেছি সবাই মায়ার প্রতিচ্ছবি
ছুঁতে গেলে বিলীন
আমি শুধু এক অস্তিত্বহীন উপমা
নামহীন রূপহীন শূন্যতায় গড়া ।

🫁 Guedel Airway – Colour Coding & SizesColour Code Size (mm) Length (cm) Patient Group🩷Pink 000 4.0 cm Premature neonate...
22/01/2026

🫁 Guedel Airway – Colour Coding & Sizes
Colour Code Size (mm) Length (cm) Patient Group
🩷Pink 000 4.0 cm Premature neonate
🟦Blue 00 5.0 cm Neonate
⬛Black 0 6.0 cm Infant
🤍White 1 7.0 cm Toddler
🟩Green 2 8.0 cm Child
🟨Yellow 3 9.0 cm Small adult
🟥Red 4 10.0 cm Medium adult
🟧Orange 5 11.0 cm Large adult
📏 How to Select Correct Size (Bedside Method)
Measure from:
👉 Angle of mouth to angle of mandible

or
👉 Corner of mouth to earlobe

✅ Indications
Maintains airway patency

Prevents tongue fall-back

Used in unconscious patients

During bag-mask ventilation

⚠ Contraindication
❌ Conscious or semi-conscious patient (risk of gagging & vomiting).

🩺Bored of ICU Boarding?: When to Consider ED ExtubationThe emergency department serves many critically ill patients that...
08/01/2026

🩺Bored of ICU Boarding?: When to Consider ED Extubation

The emergency department serves many critically ill patients that require airway management and mechanical ventilation. Most of these patients go on to require ICU care. However, some patients require only brief intubation and should be appropriate candidates considered for emergency physician-driven extubation. Early extubation can minimize the risks associated with mechanical ventilation for patients such as ventilator associated pneumonia (VAP), ventilator induced lung injury (VILI), and others. Additionally, in setting of high levels of ED boarding and limited ICU resources, extubating appropriate candidates in the ED can reduce boarding times and improve patient flow.
Who?
Patients with temporary neurologic dysfunction (alcohol/drug intoxication)
Need for brief procedural sedation that cannot be accomplished without a definitive airway (endoscopy)
Patients transitioning to a palliative, comfort-focused approach to treatment
Screening Checklist
Returned to baseline mental status, able to follow commands
Appropriate vital signs on minimal ventilator support
Breathing spontaneously with RR 6-8 cc/kg
May be on low-dose vasopressor to manage sedation-related hypotension
No history of difficulty intubation (in case emergent reintubation is required)
Testing
Perform spontaneous breathing trial (SBT):
IPAP 10 cmH2O over EPAP of 5 cmH2O, also described as pressure support of 5 cmH2O over PEEP of 5 cmH2O
30 minutes
Assess the RSBI (Rapid Shallow Breathing Index — available on MDCalc)
Patient fails for EP-driven extubation if one or more of the following is present:
respiratory distress
severe anxiety
hypoxemia (SaO2 < 90%)
tachypnea (usually RR > 30)
somnolence
RSBI > 105 breaths/min/L
Prepare - depending on institution, may require consultation with the hospital intensivist
Notify the respiratory therapist (extubation ideally performed by the RT, if available)
Have standard AND difficult airway equipment at bedside
These specifically selected patients can usually be extubated to temporary standard nasal cannula
Optimal respiratory support post-extubation for palliative patients depends on patient-specific care plan
For patients with respiratory distress with plan for compassionate extubation, we advise palliative op**te and anxiolytic administration closely titrated to patient comfort, adjusted as ventilator support is weaned down to a pressure support of 0 over PEEP of 0-5. This ensures the patient remains comfortable with minimal distress and air hunger when ventilator support is removed. Other palliative patients with no tachypnea or distress do not necessarily require this measure.
Some of these patients may be anxious when transitioning off mechanical ventilation; consider use of dexmedetomidine in the peri-extubation period to facilitate patient comfort while maintaining respiratory drive
Perform - see this video courtesy of Respiratory Skills - LSC on performing extubation
Make sure to monitor for post-extubation hypoxemia and post-extubation stridor
Always be prepared for the potential need for re-intubation.

🌬️ Asthma vs 🚬 COPD (Quick Clinical Review)🔍 Definition • Asthma: Chronic reversible airway inflammation with bronchial ...
06/01/2026

🌬️ Asthma vs 🚬 COPD (Quick Clinical Review)

🔍 Definition
• Asthma: Chronic reversible airway inflammation with bronchial hyperresponsiveness.
• COPD (Chronic Obstructive Pulmonary Disease): Progressive irreversible airflow limitation due to chronic bronchitis and/or emphysema.

🤕 Symptoms

Asthma
• Episodic wheeze, cough, chest tightness
• Worse at night/early morning
• Triggered by allergens, exercise, cold air
• Symptoms vary day to day

COPD
• Chronic cough with sputum
• Progressive dyspnea
• Frequent infective exacerbations
• Symptoms persistent, slowly worsening
⸻

🧪 Diagnosis

Asthma
• Spirometry: ↓FEV₁ with reversibility (>12% & >200 mL after bronchodilator)
• Normal lung function between attacks

COPD
• Spirometry: FEV₁/FVC < 0.70 post-bronchodilator
• Limited or no reversibility
• Often abnormal CXR (hyperinflation)

⸻
🔎 Differential Diagnosis
• Asthma: Vocal cord dysfunction, GERD, heart failure
• COPD: Asthma, bronchiectasis, TB sequelae, heart failure

⸻
💊 Treatment

Asthma
• Inhaled corticosteroids (ICS) = cornerstone
• SABA for relief
• LABA only with ICS
• Avoid triggers

COPD
• Smoking cessation (most important)
• LABA/LAMA bronchodilators
• ICS only if frequent exacerbations
• Pulmonary rehab, oxygen if hypoxic

⸻

🔁 Follow-Up
• Asthma: Assess control, inhaler technique, step-up/down therapy
• COPD: Monitor symptoms (CAT), exacerbations, spirometry yearly, vaccinations

⸻
🧠 Easy Mnemonics
• ASTHMA = “A R E T”
Allergy related • Reversible • Episodic • Triggered
• COPD = “S P A N”
Smoker • Persistent • Airflow fixed • Not reversible

High-Flow Nasal Cannula (HFNC) — Evidence-Based Overview (2026)🔹 What is HFNC?HFNC delivers heated, humidified oxygen at...
05/01/2026

High-Flow Nasal Cannula (HFNC) — Evidence-Based Overview (2026)

🔹 What is HFNC?

HFNC delivers heated, humidified oxygen at high flow rates (up to 60 L/min in adults), matching or exceeding the patient’s inspiratory demand to provide a stable and precise FiO₂ with superior comfort compared to conventional oxygen therapy.

🧠 Key Take-Home Message

HFNC combines high-flow oxygen, humidification, and mild positive pressure to improve oxygenation, reduce work of breathing, and enhance comfort—making it a cornerstone of modern noninvasive respiratory support when used with proper monitoring and patient selection.

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