Percutaneous tracheostomy exam ready answer for 10 marks for md anaesthesia (include any updates) along with guide at the end about what points to focus on for the cams.
Reading File
Finding Sources
Searching PubMed
"percutaneous tracheostomy" AND technique
Searching the Web
percutaneous tracheostomy MD anaesthesia exam 10 marks techniques complications updates 2024 2025
Reading File
Reading File
Finding Sources
Reading File
Reading File
Reading File
I now have comprehensive data from multiple authoritative sources. Let me compile the full exam answer:
Percutaneous Tracheostomy - MD Anaesthesia Exam Answer (10 Marks)
DEFINITION
Percutaneous tracheostomy (PT) is a minimally invasive technique of creating a tracheal airway using the Seldinger (guidewire-based) technique, without formal surgical dissection. It is the preferred method for airway access in the ICU. First described by Toye and Weinstein (1969); the modern technique popularised by Ciaglia et al. in 1985.
INDICATIONS
Elective (Planned):
- Prolonged mechanical ventilation (anticipated >7-10 days)
- Facilitation of weaning from ventilator
- Airway protection - impaired neurological status (GCS <8, TBI, spinal cord injury)
- Difficult airway - to bypass upper airway obstruction
- Pulmonary toilet - to facilitate bronchial suctioning
- Upper airway trauma/tumors/angioedema
Compared to translaryngeal intubation, tracheostomy:
- Reduces laryngeal injury
- Decreases sedation requirements
- Aids ventilator liberation
- Facilitates oral intake and phonation
CONTRAINDICATIONS
| Absolute | Relative |
|---|---|
| Local infection/malignancy at site | Morbid obesity |
| Uncontrolled coagulopathy | Short, thick neck |
| Emergency airway (cricothyrotomy preferred) | Previous neck surgery |
| Cervical spine instability | |
| FiO2 >50% or PEEP >10 cmH2O | |
| Haemodynamic instability | |
| Elevated ICP | |
| Paediatric patients |
TIMING
- Timing is controversial; most studies show no significant difference in mortality, pneumonia rates, or hospital LOS between early (<7-10 days) vs. late tracheostomy
- Current practice: consider tracheostomy when risk of failed extubation or airway loss is estimated >1 in 1000
TECHNIQUES
1. Ciaglia Multiple Dilator Technique (Original, 1985)
- Serial dilators of increasing size passed over Seldinger guidewire
- Now largely superseded by single-step dilation
2. Ciaglia Blue Rhino (Most Widely Used Currently)
- Single curved, hydrophilic-coated single-step dilator passed over guidewire
- Simpler and faster than serial dilation
- Fewer episodes of periprocedural hypoxia compared to serial technique
3. Griggs Guidewire Dilating Forceps (GWDF) Technique
- A pair of Howard-Kelly forceps modified to track over a guidewire
- Forceps opened in trachea to dilate the stoma
- Rapid technique; higher risk of posterior tracheal wall injury
4. Fantoni Translaryngeal Tracheostomy (TLT)
- Guidewire passed retrogradely - from trachea upward through larynx, out of mouth
- Tracheostomy tube pulled inside-out through neck
- Higher technical complexity; now rarely used
5. PercuTwist Technique
- Single dilating screw rotated over guidewire - controlled dilation
- Suitable for patients with short or thick necks
6. Frova Ultrasound-Guided Technique (ULTRASOUND-GUIDED PDT)
- Uses real-time ultrasound + bronchoscopy guidance
- Now considered standard of care at many centres (see Updates section below)
STEP-BY-STEP PROCEDURE (Ciaglia Blue Rhino)
Preparation:
- Increase FiO2 to 1.0 (100%)
- Position: Supine with shoulder roll to extend neck
- Identify landmarks: thyroid cartilage, cricoid cartilage, 1st-3rd tracheal rings
- Standard monitoring (SpO2, ECG, NIBP, EtCO2); IV access
- Administer sedation, analgesia, short-acting neuromuscular blockade
- Sterile prep and drape
Airway Control:
7. Anaesthesiologist at head of bed manages ETT and bronchoscope
8. Withdraw ETT until cuff is just below the cords (cuff palpable at subglottic level) - confirmed bronchoscopically
9. Deflate cuff during needle insertion to avoid puncture
Procedure:
10. Infiltrate skin with 1% lidocaine + adrenaline (vasoconstrictive purpose)
11. Horizontal or vertical skin incision 1-1.5 cm, between 1st-2nd or 2nd-3rd tracheal interspaces (ideal: between rings 2-3)
12. Blunt dissection to tracheal rings; confirm with palpation
13. Insert 14G introducer needle midline with syringe - air aspiration confirms intratracheal position; bronchoscopy confirms needle tip
14. Pass J-tipped guidewire through needle into trachea
15. Dilate stoma with Blue Rhino single dilator (well lubricated)
16. Advance tracheostomy tube (with obturator/inner cannula) over guidewire into trachea
17. Remove guidewire and obturator; inflate cuff
18. Confirm placement: EtCO2, auscultation, direct bronchoscopy
19. Secure tube; connect ventilator circuit; remove ETT
PRE-PROCEDURE CHECKLIST
- Review CT neck (if available) for vascular anatomy: high-riding innominate artery, aberrant vessels
- Lab: platelet count >50,000/mm³; PT/PTT <1.5x normal; BUN (for uremia)
- If uraemic patient: DDAVP pre-treatment before procedure
- Ultrasound of neck: evaluate overlying vasculature (standard in many centres)
BRONCHOSCOPIC GUIDANCE
Bronchoscopy is highly recommended (near-standard) during PDT:
- Confirms midline needle entry and guidewire position
- Avoids posterior tracheal wall injury
- Confirms final tube position
- Monitors ETT withdrawal
COMPLICATIONS
Intra-procedural / Early (<24 hours)
| Complication | Notes |
|---|---|
| Haemorrhage | Most common early complication; lidocaine-adrenaline helps; rate ~2-5% |
| Hypoxia/desaturation | Especially during dilation phase |
| Posterior tracheal wall injury | May cause pneumomediastinum/pneumothorax |
| Accidental decannulation | Dislodgement before tract is established; life-threatening in 1st 5-7 days |
| False passage / paratracheal insertion | Avoided by bronchoscopic confirmation |
| Subcutaneous emphysema | |
| Pneumothorax | More common with Griggs technique |
| Air embolism | Rare |
| Loss of airway | Requires emergency re-intubation |
| Cardiac arrest/Death | Rare; periprocedural mortality <0.2% |
Late (>7 days)
| Complication | Notes |
|---|---|
| Tracheal stenosis | Overall incidence low (0.16% clinically significant per large meta-analysis); stridor when lumen <5 mm (>75% reduction) |
| Tracheomalacia | |
| Tracheo-innominate artery fistula (TIF) | <1% incidence; peak at 7-14 days; mortality ~85.7% (survival ~14.3%); sentinel bleed warning sign |
| Tracheo-oesophageal fistula (TOF) | Posterior wall erosion |
| Stomal infection/granuloma | |
| Delayed stomal closure | After prolonged cannulation |
| Scar formation | PDT gives more cosmetic scar than open |
MANAGEMENT OF TRACHEO-INNOMINATE ARTERY FISTULA (TIF)
- Do not deflate cuff until in operating theatre
- If stable: CT neck with contrast to visualise fistulous tract
- If active haemorrhage: insert ETT orally past the bleeding site, inflate cuff distal to bleed + apply digital anterior pressure through stoma
- Urgent surgical repair in OR
PDT vs SURGICAL TRACHEOSTOMY - COMPARISON
| Parameter | PDT | Surgical Tracheostomy |
|---|---|---|
| Setting | ICU bedside | Operating room |
| Time | Faster | Longer |
| Cost | Lower | Higher |
| Wound infection | Lower | Higher |
| Bleeding | Similar or lower | Higher |
| Cosmesis | Better (smaller stoma) | Larger scar |
| Anatomy needed | Clear palpable landmarks | Can do in difficult anatomy |
| Visualisation | Indirect (bronchoscope) | Direct |
| Preferred in obese/difficult neck | Relative contraindication | Safer option |
Multiple meta-analyses (including one of 17 RCTs, n=1212 patients) show PDT associated with fewer wound infections and bleeding compared to surgical tracheostomy. Periprocedural complication rate 0.15%; mortality <0.1% in large case series (>3000 procedures).
TRACHEOSTOMY TUBE TYPES
- Cuffed tube: Initially used; cuff pressure must be maintained <25 mmHg (or <20 cmH2O) to prevent ischaemia and stenosis
- Uncuffed tube: Once ventilatory support no longer needed
- Fenestrated tube: For speaking valve use
- Inner cannula: Mandatory to prevent lumen occlusion from secretions
- Adjustable-flange tube: For obese/long necks
UPDATES AND RECENT EVIDENCE (2023-2026)
1. Ultrasound-Guided PDT - Now Standard of Care
- Real-time point-of-care ultrasound (POCUS) for pre-procedural neck assessment AND procedural guidance is now strongly recommended
- Identifies overlying vessels, tracheal midline, and ideal puncture site
- Reduces vascular complications
- A 2025 systematic review & meta-analysis (Soni et al., Anaesthesia 2025, PMID 40891437) confirmed POCUS utility in airway management in difficult airways
- Dual guidance (bronchoscopy + ultrasound) considered gold standard
2. Early vs. Late Tracheostomy - Ongoing Debate
- TracMan (UK RCT) and TRACMAN data continue to show no mortality benefit with early (<4 days) vs. late tracheostomy in ICU patients
- Current consensus: no fixed timing rule; individualise based on predicted duration of ventilation
3. PDT in Special Populations
- Obesity: Previously a relative contraindication; recent large series (>3000 patients, Sabiston) demonstrate safety with PDT across higher obesity classes when performed by experienced operators
- COVID-19 patients on ECMO: PDT performed safely with modifications; tracheostomy delayed typically until ECMO independence or stability
- Paediatric patients: PDT remains relatively contraindicated; open surgical technique preferred (2024 systematic review, Namavarian et al., PMID 38185003)
4. Decannulation Protocols
- Structured, multidisciplinary decannulation protocols with cuff deflation trials, speaking valve use, and capping trials are recommended
- Swallowing assessment prior to decannulation is now standard
5. Cuff Pressure Monitoring
- Cuff pressure should be monitored every 8 hours and maintained <25 mmHg; automated cuff pressure devices gaining popularity
ANAESTHESIA MANAGEMENT FOR PDT
Drugs commonly used:
- Sedation: Propofol infusion or midazolam; Ketamine (maintains airway reflexes, useful if not intubated)
- Analgesia: Fentanyl/morphine
- Neuromuscular blockade: Short-acting agents (succinylcholine, atracurium, rocuronium)
- Local: 1% lignocaine + 1:200,000 adrenaline
Monitoring:
- SpO2, EtCO2, ECG, NIBP (every 1-2 min during procedure), arterial line if haemodynamically unstable
Key anaesthetic roles:
- Manage ETT withdrawal under bronchoscopic guidance
- Ensure adequate sedation/NMB to prevent coughing (which can cause posterior tracheal wall injury)
- Maintain oxygenation; pre-oxygenate and use 100% FiO2
- Manage any airway emergency; be prepared for emergency re-intubation
ADVANTAGES OF PDT OVER OPEN TRACHEOSTOMY
- Bedside procedure - no OR transport of critically ill patient
- Shorter procedure time
- Cost-effective
- Lower wound infection rates
- Better cosmetic result (smaller, neater stoma)
- Can be performed by non-surgeon trained intensivists/anaesthesiologists
- Tissue dilation rather than cutting - less bleeding
EXAM GUIDE: KEY POINTS TO FOCUS FOR VIVA / WRITTEN (MD Anaesthesia)
High-Yield Points That Examiners Typically Ask
1. Most Common Technique
Always name Ciaglia Blue Rhino as the current gold standard for PDT. Know the original Ciaglia (1985, serial dilators) and that Blue Rhino is a single-step modification.
2. Landmark and Entry Point
Between 2nd and 3rd tracheal rings is ideal. Higher placement = subglottic stenosis. Lower placement = risk of TIF with high-riding innominate artery. Know this cold.
3. ETT Position During Procedure
ETT cuff must be positioned just below the vocal cords (subglottic) during needle insertion - confirmed bronchoscopically. This prevents ETT cuff puncture and allows access to the 2nd-3rd interspace.
4. Role of the Anaesthesiologist
A very common exam question. Three roles: (a) airway management + ETT withdrawal, (b) bronchoscopic guidance, (c) sedation/NMB administration. Examiners want you to describe the "head of the bed" physician role explicitly.
5. Complications - TIF
Tracheo-innominate artery fistula is the most feared late complication. Know: timing (7-14 days), presentation (sentinel bleed), mortality (>85%), management (do NOT deflate cuff; digital anterior pressure through stoma; OR).
6. PDT vs Surgical - When to Choose Surgical
Surgical tracheostomy is preferred over PDT when: neck anatomy is unfavourable (short/thick/obese), coagulopathy is uncorrectable, paediatric patient, emergency situation, cervical spine injury with immobilisation, or previous neck surgery.
7. Cuff Pressure
<25 mmHg (or <20 cmH2O). This is a direct question asked in viva exams. Prevents mucosal ischaemia → stenosis.
8. Bronchoscopy - Why It Matters
Bronchoscopy confirms midline entry, detects posterior wall injury, confirms tube placement, and monitors ETT withdrawal. This is often asked as "how do you confirm correct placement?"
9. Contraindications - Must Know
High FiO2 (>50%) and high PEEP (>10 cmH2O) are contraindications to bedside PDT - if patient is critically dependent on ventilatory support, even temporary loss of airway for the procedure can be fatal.
10. Recent Updates to Mention in Exams
Mention ultrasound guidance (POCUS + bronchoscopy as dual guidance), PDT safety in obesity (large series data), and the timing controversy (TracMan trial). This will distinguish your answer from a standard textbook answer.
11. Tracheal Stenosis - Clinically Significant When?
Clinically significant only when >75% luminal reduction; stridor appears when diameter <5 mm. Incidence is 0.16% in large meta-analysis of PDT.
12. Periprocedural Mortality
<0.2% in RCTs; <0.1% in large ICU series. Know these numbers.
Marks Distribution Strategy (for 10-mark answer)
| Section | Marks |
|---|---|
| Definition + Historical background | 0.5 |
| Indications & Contraindications | 1.5 |
| Techniques (at least 4) | 2 |
| Step-by-step procedure | 2 |
| Complications (early + late, with TIF detail) | 2 |
| PDT vs Surgical comparison | 1 |
| Updates (USG guidance, timing, special populations) | 1 |
| Total | 10 |
Key references cited:
- Ciaglia et al., 1985 (original PDT technique)
- Sabiston Textbook of Surgery, Chapter 47 (PDT safety, obesity data, periprocedural mortality)
- Current Surgical Therapy 14e (PDT vs ST comparison, TIF management)
- Fishman's Pulmonary Diseases and Disorders (ICU indications, PDT as preferred method)
- Bailey & Love's Short Practice of Surgery 28e (Seldinger technique steps)
- Soni VM et al., Anaesthesia 2025 [PMID 40891437] - POCUS in airway management
This is a shared conversation. Sign in to Orris to start your own chat.