PERCUTANEOUS DILATATIONAL TRACHEOSTOMY: A PROSPECTIVE ANALYSIS ABOUT THE SAFETY OF PROCEDURE AMONG ICU PATIENTS.
Objective: To evaluate the percutaneous dilatational tracheostomy procedure safety among the critically ill Medical ICU patients.
Methodology: The study was descriptive and conducted in Medical ICU, Department of Pulmonary and Critical Care Medicine, Services Institute of Medical Sciences, Lahore, from February 2015 to May 2016. Fifty three Medical ICU patients underwent tracheostomy procedure through percutaneous dilatational technique using both Grigg's and Ciaglia's methods. Procedure was performed at bed side using local anesthesia, sedation and systemic analgesia, under bronchoscopic guidance. Patients were monitored for intraprocedural and postprocedural complications like: hemorrhage, stomal infection, injury to adjacent structures, arrhythmias, transient hypoxemia, transient hypotension, paratracheal insertion, pneumothorax, sub-cutaneous emphysema, loss of airway, accidental decannulation, tracheal ring fracture and new lung infiltrate or atelectasis.
Results: A total of 53 procedures were performed. Intraprocedural complications included: Transient hypoxemia 4/53 (7.5%) and hypotension 3/53 (5.6%), hemorrhage 3/53 (5.6%) and one case of paratracheal placement. No procedure related mortality was noted. 10 patients died during the ICU stay due to the primary underlying disease and one patient died after a successful decannulation. 36 patients had uneventful decannulation. Six patients were directly discharged from ICU.
Conclusion: Percutaneous dilatational tracheostomy is a safe procedure with low complications rate and suitable for critically ill ICU patients.
Key Words: Percutaneous dilatational tracheostomy, Tracheostomy
Tracheostomy is a well-known surgical procedure which was described earlier back in ancient Egypt1. In nineteenth century, it was considered to be a dangerous procedure and seldom performed, due to its high complications rate. Jackson2 in 1909, defined the surgical principles to perform this operation and could able to avoid most of its (short and long term) complications. Toye and Weinstein in 1969 described the unique technique of percutaneous tracheostomy with the help of Seldinger guide wire and cutting dilators3 but technique did not gain the popularity probably due to its bleeding complications and it has since then been refined with various modifications. Ciaglia in 19854, described the first percutaneous dilatational tracheostomy technique without any large skin cutting except for the small skin incision and multiple dilators usage, over the Seldinger wire, which was safe and quick.
Sooner a commercial kit which used this technique became available, and the procedure started being carried out with low complications rates, both short and long term.
Percutaneous dilatational tracheostomy (PDT) is an invasive procedure in which a tracheostomy tube is placed after establishing a tracheal stoma through dilatation method, rather than the surgical creation of a tracheal stoma. Tracheostomy tube insertion is a common procedure which is mostly being performed in the intensive care units where prolonged mechanical ventilation is expected, as it is associated with higher rates of ICU mortality and compromised post-ICU discharge health associated quality of life5.
The significantly increased implementation of this practice for the past decade may partly be explained by the improvement of percutaneous dilatational technique which allows easy and rapid insertion of tracheal cannula at bedside by an experienced intensivist6.
Currently two percutaneous dilatational tracheostomy tube placement commercial kits are available: Griggs technique (Portex Ltd; Hythe Kent, United Kingdom) that used an "over the guide-wire" dilating forceps having a central opening, and the other kit which used Ciaglias method (Blue Rhino; Cook Critical Care; Bloomington. IN) that used a single curved conical dilator over the seldinger wire7. Both of these methods are safe, quick and simple.
Percutaneous tracheostomy has several advantages over the conventional surgical technique of tracheostomy tube placement. It is simpler, faster, cheaper, and can be executed at bedside without displacing the patient8. We prospectively performed the percutaneous dilatational tracheostomies in a tertiary care hospital, among ICU patients to once again evaluate the safety along with the effectiveness of the technique using both of the dilatational methods randomly.
This prospective, non-randomized, observational study was conducted in the Medical ICU, Department of Pulmonary and Critical Care Medicine, Services Institute of Medical Sciences, Lahore, from February, 2015 to May, 2016. The study comprised of 53 ICU patients who were intubated and ventilated for various indications including sepsis, tetanus, stroke, ARDS, COPD exacerbation, MOF, ACS and Post CPR vegetative states etc. All of these patients were either ventilator dependent or expected to require long term ventilatory support. Procedure was performed between 04 to 16 days of endo-tracheal intubation/ventilation. Patient with tracheal, neck and spinal abnormalities, previous tracheostomy or neck surgery, thyromegaly, soft tissue infection in the neck, severe hypoxemia, uncorrectable coagulopathy, thrombocyte count <50,000, severe hemodynamic instability or autonomic dysfunction, severe sepsis and status epilepticus were excluded.
All 53 patients underwent tracheostomy procedure through percutaneous dilatational technique using both commercially available kits (Portex Ltd; Hythe Kent, United Kingdom, that used an "over the guidewire" dilating forceps with central opening Griggs technique, and Blue Rhino; Bloomington, that uses a single curved, conical dilator with seldinger technique Ciaglias technique). The procedure was done at bedside in the setting of Medical ICU after obtaining an informed consent from next to kin of patient about the benefits and potential complications. The procedure team was comprised of four persons; an ICU interventionist, who directly performed the procedure, a bronchoscopist who guided the interventionist endotrachealy during each step of the procedure using Fiberoptic Olympus Bronchoscope(FOB), a bedside nurse who assisted the interventionist and a bronchoscopy technologist.
Procedure was performed without transportation and the help of anesthetist, in Medical ICU. Sedation and analgesia was achieved using a bolus of both IV Nalbuphine 5-10mg or Tramadol 50-100mg and Propofol, until the adequate sedation was achieved. Atracurium 0.4 to 0.5mg/kg bolus was used as muscle paralyzing agent after adequate sedation and analgesia. Patient was kept on mechanical ventilation during the procedure using controlled mode and 100% FiO. Endo-tracheal tube (ETT) was upsized to 8mm to facilitate the smooth passage of bronchoscope across the ETT and to ensure adequate minute ventilation during the procedure. All patients had continuous ECG, BP, SpO2, Temperature and end tidal carbon dioxide level (EtCO ) monitoring. Following sedation and muscle relaxation, the head was brought to extension by placing a roll pillow under the shoulders.
Gastric emptying was achieved before the procedure by aspirating NG tube. Povidone-iodine was used to cleanse the region and the area was covered with perforated sheet and 2% lidocaine was used as local anesthesia. Patients were followed prospectively for complications like: hemorrhage, stomal infection, injury to adjacent structures, arrhythmias, transient hypoxemia, transient hypotension, paratracheal insertion, pneumothorax, sub-cutaneous emphysema, loss of airway and new lung infiltrate or atelectasis.
Patient was kept in supine position with neck mildly hyperextended, the local area was cleaned with alcohol followed by povidone-iodine solution. The skin and subcutaneous planes were infiltrated with 2% lidocaine. Simultaneously Olympus Fiberoptic Bronchoscope was inserted through ETT (#8) using "adapter for uninterrupted bronchoscopy" to avoid air leak from the circuit. After a brief endo-bronchial examination, ETT was pulled up in a fashion to keep the cuff immediately under the vocal cords. A 14-G cannula (using the commercially available, either Griggs or Ciaglias kits) was moved between the second and third tracheal rings until air was inspired and/or bronchoscopist confirmed the safe and central position of the tip of cannula inside the trachea.
Tracheal space was determined either through palpation of tracheal rings or endo-bronchially by transillumination of the FOB light inside the trachea. Cannula was slided over the needle further into the trachea and needle was withdrawn. After placing the guide wire in the tracheal lumen, cannula was removed. A 10mm transverse skin incision was made (5mm on each side of the tracheal puncture) and the track was dilated with 8-F dilator. Further dilatation was achieved using dilating forceps or blue Rhino dilator, depending upon the availability of kit and a No. 7 tracheostomy tube was placed for females and No.8 tracheostomy tube for male patients. Tracheostomy cuff was inflated after confirming the position of the tube with bronchoscopist. ETT was removed and ventilator switched to tracheostomy tube.
Bronchoscopist, afterwards performed the endo-bronchial examination via tracheostomy tube to reassure the desired position of the tracheostomy tube in the trachea, to estimate the distance of the tracheostomy tube tip from the carina, and to reassure the patency of distal airways. A chest x-ray was ordered for every patient after the procedure, to rule out pneumothorax, surgical emphysema and atelectasis.
Data including the age, sex, cause for intubation and tracheostomy, days of intubation/ventilation, APACHE II Score, duration of procedure, lowest intraprocedural SpO, lowest intraprocedural BP, intraprocedural complications such as bleeding, loss of airway for more than 20 seconds, subcutaneous emphysema, tracheal ring fracture and paratracheal placement of the tube; postprocedural complications such as accidental decannulation, pneumothorax, hemorrhage, stomal granulation, infection of stoma or a new lung infiltrate within 48hours of tracheostomy; duration of tracheostomy; planned decannulation and mortality were recorded.
Complications were defined as below: Hypotension as systolic BP 250mls). A stomal infection was considered when there was a frank purulent discharge from the source with surrounding erythema of [greater than or equal to]1cm.
In our series, total 53 percutaneous dilatational tracheostomies were performed. Out of 53, 29 were females and 24 male patients with age ranges between 15 to 71 years. Mean age was 44+-27years. Patients were tracheostomized on average at 10+-6 days.
No patient underwent a repeat tracheostomy after an elective decannulation and no patient died during the PDT due to any intraprocedural complications. A total of 10 patients (19%), out of 53 died during the ICU stay due to the original underlying disease with tracheostomy tube, and only one patient ([?]2%) died after a successful decannulation, related to primary disease as well. Of the 36 patients (68%) out of 53, who survived successful decannulation, the time duration from the insertion of tracheostomy to decannulation ranged 10 to 96 days. Out of 53, six patients (11%) were directly discharged from ICU with tracheostomy in situ, for home nursing care, with or without domiciliary ventilatory support.
The intraprocedural complications are shown in table 2. One case ([?]2%) of paratracheal placement of tracheostomy was observed due to technical difficulty, which was corrected during the same procedure.
Post-procedural complications as shown in table 3 were not observed in our case series. Only one case ([?]2%) of mild post procedural hemorrhage was noted which was due to stomal skin bleeder. This required exploration of stoma and bleeding vessel was ligated.
Table 1: Patient's characteristics
2.###Age, yr, Mean +-SD###44+-27
3.###Indications for Tracheostomy
a.###Prolonged Ventilation:Tetanus,GBS,COPD,ARDS,Myasthenia etc###31(58.5%)
c.###Post CPR status/Persistent vegetative state###5(9.4%)
d.###Difficult Weaning due to various reasons.###8(15%)
e.###VA/Low GCS state.###4(7.5%)
4.###Days of Intubation prior to tracheostomy###10 +-6
5.###Repeat Tracheostomy after an elective decannulation###0
6.###Mortality during the PDT procedure.###0
7.###Patients died with tracheostomy due to original disease###10 (19%)
8.###Patients died after successful decannulation due to primary disease###1 (2%)
9.###Procedure Duration, mins (time from local anesthesia till tracheostomy insertion)###9.5+-4.5
10.###APACHE II score###19+-6
Table 2: Intra-procedural complications
1.###Transient Hypoxemia/SpO2 drop 90% for more than 2mins###4/53 (7.5%)
2.###Transient Hypotension/ BP 250mls).###0/53
4.###Loss of Airway for more than 20 seconds###0/53
6.###Tracheal Ring Fracture###0/53
7.###Paratracheal Placement of the tube###1/53 (2%)
Table 3: Post-procedural complications
3.###Hemorrhage (Mild - 25 to 100mls)###1/53 (2%)
6.###A new Lung Infiltrate within 48hours of tracheostomy###0/53
PDT has several benefits over the routine surgical approach. It is simpler, quicker, less expensive and easy to perform at bedside without moving the patient outside the ICU premises7. This is mostly important in cases where the patient's condition is critical, and displacing the patient from the unit is difficult and sometimes dangerous8.
The complications rate of ordinary surgical tracheostomy seems inordinately high in the context of being relatively simple surgical procedure9. Surgical tracheostomy complications rate ranges from 6 to 66% and mortality from 0 to 5% and the complications rate of procedure done in ICU are comparable to those performed in operating theater10. In contrast to "routine" tracheostomy, the PDT technique uses the tube of smallest possible size (and stoma) required for adequate air flow and suctioning, and moreover, this smaller size aids in minimizing the chance of hemorrhage11. When properly performed, the large blood vessels are avoided, and the slight ooze of blood from the small incision is tamponaded by the snug fit of the tracheostomy tube. In addition, the rate of infection is reduced, since less soft tissue is exposed for a possible contamination.
One study12 compared PDT and surgical tracheostomy and reported that PDT was more advantageous in terms of hemorrhage and complication and so was preferred over surgical tracheostomy.
In our case series of 53 patients, in whom percutaneous dilatational tracheostomy tube was inserted, using both Grigg's and Ciaglia's methods, no procedure technique related mortality was observed. Intraprocedural complications rate was significantly low, which is comparable with internationally published data about the safety of PDT12-14. A single case of paratracheal placement, which was corrected during the same procedure uneventfully, was related to obesity and kinking of guide wire and guiding catheter. Transient hypotension and hypoxemia, occurring in 3 and 4 patients respectively, was related to either sedatives/muscle relaxants use or due to the preexisting compromised respiratory status of a patient. Drug induced hypotension was controlled in successive procedures by injecting the sedatives/ muscle relaxants in small and frequent boluses, and by improving the hydration status of patient before the procedure.
Early tracheostomies were performed in our study especially for patients like tetanus, GBS and with low GCS state.
We have found the PDT bedside procedure very useful and safe, especially for patients in whom transportation carried more risk due to different reasons like: morbid obesity, polytrauma/axial skeleton fractures, unstable general status, difficult intubation and moderate to severe dysautonomias. Patients with minor coagulopathies, anemia or mild thrombocytopenia who had relative contraindication to blood products transfusion, e.g a patient with a recent history of transfusion related acute lung injury, were declared unfit for the procedure by surgeons and anesthetists for conventional surgical tracheostomy procedure. These patients underwent PDT without any increased incidence of intra or postprocedural complication rate emphasizing the ease and safety of the procedure.
Same findings were noted by Karvandian et al13 and Saritas et al14 that the complication rates of hemorrhage, pneumothorax, surgical emphysema, esophageal perforation and tracheomalacia were significantly less with percutaneous dilatational tracheostomy and was preferred for critically ill patients.
In another study which was conducted on 300 patients who were managed in an ICU of a tertiary care hospital, Pattnaik et al15 reported an overall 8.6% complication rate which included the cases of minor and major bleeding which is comparable with our case series where the overall intraprocedural complication rate was 20.7%.
Percutaneous dilatational tracheostomy is a safe procedure with low complications rate. PDT is particularly suitable for critically ill patients and can safely be performed without transporting the patients outside the ICU premises.
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|Publication:||Journal of Postgraduate Medical Institute|
|Date:||Mar 31, 2017|
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