Thoracic ultrasound: a review of the state-of-the-art

Thoracic ultrasound (TUS) is a tool that has become increasingly essential in the daily practice of thoracic medicine. Driven by the need to assess patients during the COVID-19 pandemic, there has been an increase in the use of point-of-care TUS, which has demonstrated several benefits, either as a complement to clinical decision-making for diagnosis or as a real-time guide for procedures, whether as a predictor or measure of treatment response. Here, we present a review of TUS, based on the most recent scientific evidence, from equipment and techniques to the fundamentals of pulmonary ultrasound, describing normal and pathological findings, as well as focusing on the management of lung disease and guidance for invasive thoracic procedures at the bedside. Finally, we highlight areas of perspective and potential lines of research to maintain interest in this valuable tool, in order to improve the diagnostic process and expand the treatment arsenal.

Impact of radiological surveillance for major blood vessels on complications of percutaneous dilatational tracheostomy: A retrospective cohort study

PURPOSE

Percutaneous dilatational tracheostomy (PDT) is the preferred method for managing long-term ventilator-dependent patients in ICUs. This study aimed to evaluate the association between preprocedural screening (ultrasound Doppler [USD] or computed tomography [CT]) for major neck blood vessels and complications in ICU patients undergoing PDT.

MATERIALS AND METHODS

This was a retrospective cohort study of patients who underwent PDT between 2012 and 2023 at a tertiary referral center. We performed a multivariable analysis and created a propensity-matched cohort. The primary outcome was bleeding within the first seven days after PDT. Secondary outcomes included early and late PDT complications and PTD-related mortality.

RESULTS

A total of 1766 consecutive critically ill patients hospitalized at a tertiary academic hospital were evaluated for PDT. Of these, 881 (49.9 %) underwent only physical examination before PDT, while 885 (50.1 %) underwent additional imaging (CT/USD). A higher proportion of patients in the imaging group were referred to open surgery due to suspected major blood vessels interfering with the procedure (6.2 % vs. 3.0 %, p = 0.001). Among the 1685 patients who underwent PDT, there was no significant difference in the rate of early bleeding between the physical examination group and the imaging group (4.6 % vs. 6.3 %, p = 0.12). Similarly, the overall early complication rates (5.5 % vs. 7.6 %, p = 0.08), late complication rates (1.6 % vs. 2.2 %, p = 0.42), and PDT-related mortality rates (0.7 % vs. 0.6 %, p = 0.73) did not exhibit significant differences between the two groups. In a propensity score-matched cohort, results remained consistent.

CONCLUSIONS

Physical examination can effectively identify major neck blood vessels without increasing the risk of bleeding during and after PDT.

Comparison of landmark guided and ultrasound guided percutaneous dilatational tracheostomy: Efficiency, efficacy and accuracy in critically ill patients

Background and Aims:

To overcome the procedure-related complications associated with landmark-guided percutaneous dilatational tracheostomy (PDT) ultrasound is emerging as a promising tool. Present study was designed to compare landmark-guided PDT and ultrasound-guided PDT in terms of efficiency, efficacy, and accuracy.

Material and Methods:

Hundred intensive care unit patients requiring prolonged mechanical ventilation were prospectively randomized into 2 groups of 50 patients each. In land mark guided (LMG) group, patients underwent landmark-guided PDT, whereas in ultrasound guided (USG) group, patients underwent ultrasound-guided PDT.

Results:

Both the groups were comparable in terms of demographic data, sequential organ failure assessment score, ventilator settings, and mean days on mechanical ventilation prior to PDT. The mean assessment time in the ultrasound-guided group (1.56 ± 1 min) was significantly more (P-value = 0.000) than in the landmark-guided group (0.84 ± 0.72 min). The mean total procedure time for the USG group (5.98 ± 10.23 min) was more than that for the LMG group (4.86 ± 8.03 min) (P-value 0.542). Deviation of puncture site from the midline was seen in two patients in group A as compared to none in the USG group (P-value = 0.153). The number of patients requiring more than one attempt for successful needle insertion was more (P-value = 0.148) in the LMG group (20%) as compared to USG group (8%). Incidence of complications, like bleeding and desaturation was more in the LMG group as compared to the USG group.

Conclusion:

Ultrasound-guided PDT is associated with reduction in periprocedural complications as compared to landmark technique, although it takes slightly longer time.

Comparative effectiveness of ultrasound-guided and anatomic landmark percutaneous dilatational tracheostomy: A systematic review and meta-analysis

Introduction

Ultrasound-guided tracheostomy (UGT) and bronchoscope-guided tracheostomy (BGT) have been well compared. However, the differences in benefits between UGT and landmark tracheostomy (LT) have not been addressed and, in particular, lack a detailed meta-analysis. We aimed to compare the first-pass success, complication rate, major bleeding rate, and tracheostomy procedure time between UGT and LT.

Methods

In a systematic review, relevant databases were searched for studies comparing UGT with LT in intubated patients. The primary outcome was the odds ratio (OR) of first-pass success. The secondary outcomes were the OR of complications, OR of major bleeding, and standardized mean difference (SMD) of the total tracheostomy procedure time.

Results

The meta-analysis included three randomized controlled studies (RCTs) and one nonrandomized controlled study (NRS), comprising 474 patients in total. Compared with LT, UGT increased first-pass success (OR: 4.287; 95% confidence interval [CI]: 2.308 to 7.964) and decreased complications (OR: 0.422; 95% CI: 0.249 to 0.718). However, compared with LT, UGT did not significantly reduce major bleeding (OR: 0.374; 95% CI: 0.112 to 1.251) or the total tracheostomy placement time (SMD: -0.335; 95% CI: -0.842 to 0.172).

Conclusions

Compared with LT, real-time UGT increases first-pass success and decreases complications. However, UGT was not associated with a significant reduction in the major bleeding rate. The total tracheostomy placement time comparison between UGI and LT was inconclusive.

Evaluation of percutaneous dilatational tracheostomy under laryngosuspension

PURPOSE

To describe the technique and outcomes of percutaneous tracheostomy under laryngosuspension.

METHODS

A consecutive series of patients who underwent percutaneous tracheostomy under laryngosuspension were reviewed for outcomes. The procedure is performed under general anesthesia and laryngosuspension. An 8.5 oral endotracheal tube is inserted and the cuff is inflated in the supraglottis, allowing access to the whole trachea and subglottis. The tube is taped to the laryngoscope. A rigid endoscope is inserted in the endotracheal tube through a swivel connector connected to the tube and the ventilation circuit. Percutaneous tracheostomy kit is used to perform dilatational tracheostomy at the desired level of the trachea under direct visual endoscopic control.

RESULTS

Forty-eight patients underwent percutaneous tracheostomy under laryngosuspension. Thirty-two cases were performed in an emergency after securing the airway with endotracheal intubation. In all other cases, tracheostomy was performed as a part of an elective procedure affecting the airway or in patients requiring prolonged ventilation. More than half of patients were considered high risk by virtue of one or more of the following: morbid obesity, prior neck surgery, prior neck radiotherapy, progressive head and neck cancer, or laryngotracheal stenosis. Complications occurred in seven cases.

CONCLUSION

Percutaneous tracheostomy under laryngosuspension has the advantage of optimal control of patient ventilation and hemostasis throughout the procedure. High-quality endoscopic vision and easy access to the airway under laryngosuspension allow tracheostomy to be performed with maximum safety.

Dilatational Percutaneous vs Surgical TracheoStomy in IntEnsive Care UniT: A Practice Pattern Observational Multicenter Study (DISSECT)

Introduction

Tracheostomy is among the common procedures performed in the intensive care unit (ICU), with percutaneous dilatational tracheostomy (PDT) being the preferred technique. We sought to understand the current practice of tracheostomy in Indian ICUs.

Materials and methods

A pan-India multicenter prospective observational study, endorsed and peer-reviewed by the Indian Society of Critical Care Medicine (ISCCM), on various aspects of tracheostomy performed in critically ill patients was conducted between September 1, 2019 and December 31, 2019. The SPSS software was used for the statistical analysis. Cross tables were generated and the chi-square test was used for testing of association. The p value < 0.05 was considered statistically significant.

Results

Out of 67 ICUs that participated, 88.1% were from private sector hospitals. A total of 923 tracheostomies were performed during the study period; out of which, 666 were PDT and 257 were surgical tracheostomy (ST). Coagulopathic patients received more platelet transfusion [p = 0.037 with platelet count (PC) < 50 × 10⁹, p = 0.021 with PC 50–100 × 10⁹] and fresh frozen plasma transfusion in the ST group (p = 0.0001). The performance of PDT vs ST by day 7 of admission was 28.4% vs 21% (p = 0.023). The single dilator technique (60.4%) was the preferred technique for PDT followed by the Grigg's forceps and then the multiple dilator technique. Fiberoptic bronchoscope (FOB) and ultrasonography (USG) were used in 29.3% and 16.8%, respectively, for guidance during tracheostomy. Most of the PDTs were performed by a trained intensivist (74.2%), whereas ST was mostly done by an ENT surgeon (56.8%). Percutaneous dilatational tracheostomy resulted in less hemorrhagic (2.6% vs 7%, p = 0.002) and desaturation complications (2.3% vs 6.6%, p = 0.001) as compared to ST. The duration of procedure was shorter in the PDT group (average shortening by 9.2 minutes) and the ventilator-free days (VFD) were higher in the PDT group. The cost was less in PDT by approximately Rs. 13,104.

Conclusion

Percutaneous dilatational tracheostomy, especially the single dilator technique, is preferred by clinicians in Indian ICUs. The incidence of minor complications like hemorrhagic episodes is lower with PDT. Percutaneous dilatational tracheostomy was found to be cheaper on cost per patient basis as compared to ST (with or without complications).

How to cite this article

Gupta S, Tomar DS, Dixit S, Zirpe K, Choudhry D, Govil D, et al. Dilatational Percutaneous vs Surgical TracheoStomy in IntEnsive Care UniT: A Practice Pattern Observational Multicenter Study (DISSECT). Indian J Crit Care Med 2020;24(7):514–526.

Tracheostomy in Adult Intensive Care Unit: An ISCCM Expert Panel Practice Recommendations

BACKGROUND AND AIM

Critically ill patients on mechanical ventilation undergo tracheostomy to facilitate weaning. The practice in India may be different from the rest of the world and therefore, in order to understand this, ISCCM conducted a multicentric observational study "DIlatational percutaneous vs Surgical tracheoStomy in intEnsive Care uniT: A practice pattern observational multicenter study (DISSECT Study)" followed by an ISCCM Expert Panel committee meeting to formulate Practice recommendations pertinent to Indian ICUs.

MATERIALS AND METHODS

All existing International guidelines on the topic, various randomized controlled trials, meta-analysis, systematic reviews, retrospective studies were taken into account to formulate the guidelines. Wherever Indian data was not available, international data was analysed. A modified Grade system was followed for grading the recommendation.

RESULTS

After analyzing the entire available data, the recommendations were made by the grading system agreed by the Expert Panel. The recommendations took into account the indications and contraindications of tracheostomy; effect of timing of tracheostomy on incidence of ventilator associated pneumonia, ICU length of stay, ventilator free days & Mortality; comparison of surgical and percutaneous dilatational tracheostomy (PDT) in terms of incidence of complications and cost to the patient; Comparison of various techniques of PDT; Use of fiberoptic bronchoscope and ultrasound in PDT; experience of the operator and qualification; certain special conditions like coagulopathy and morbid obesity.

CONCLUSION

This document presents the first Indian recommendations on tracheostomy in adult critically ill patients based on the practices of the country. These guidelines are expected to improve the safety and extend the indications of tracheostomy in critically ill patients.

HOW TO CITE THIS ARTICLE

Gupta S, Dixit S, Choudhry D, Govil D, Mishra RC, Samavedam S, Tracheostomy in Adult Intensive Care Unit: An ISCCM Expert Panel Practice Recommendations. Indian J Crit Care Med 2020;24(Suppl 1):S31-S42.

The Effect of Flexible Lightwand and Ultrasonography Combination on Complications of the Percutaneous Dilatational Tracheostomy Procedure

The aim of this study was to evaluate the effect of the flexible lightwand and ultrasonography (USG) combination on reducing the complications in percutaneous dilatational tracheostomy (PDT) opened with the forceps dilatation method. A retrospective examination was made of 138 patients between January 2014 and December 2018. Before starting to process, the anatomic structures of the patients were visualized with USG and the tracheostomy area was marked. Sedation and local anesthesia were applied to patients before the procedure, then the percutaneous tracheostomy was performed using the Griggs technique after confirmation of the tracheostomy localization defined with USG using the transillumination method with a flexible lightwand within an endotracheal tube. Complications that developed associated with the procedure were recorded. The mean age of the patients was 59.1±22.0 years and the mean length of stay in the intensive care unit was 42.3±35.5 days (range, 11-207 days). Overall, complications developed in 22 (15.6%) patients, of which 10.7% were early complications (1.4% related to the tube, 5.8% minor and 3.5% major complications). Tube- related complications were seen to develop in two patients. In the evaluation of the early minor complications, the most frequently seen complication was minor bleeding in 5.8% of the patients. No major vessel bleeding was determined in any patient in the early or late period. Of the late complications, the infection was seen to develop in four (2.8%) patients and stenosis in three (2.1%). The combination of flexible lightwand and USG in the PDT procedure minimized tube-related complications and contributed to the prevention of bleeding complications.

A Network Comparative Meta-analysis of Percutaneous Dilatational Tracheostomies Using Anatomic Landmarks, Bronchoscopic, and Ultrasound Guidance Versus Open Surgical Tracheostomy

BACKGROUND

Several different tracheostomy techniques (percutaneous and surgical) have been studied extensively in previous direct pairwise meta-analyses. However, a network comparative meta-analysis comparing all has not been conducted before.

OBJECTIVE

We sought to compare three percutaneous dilatational tracheostomy techniques with open surgical tracheostomy technique (performed in the operating room or in the intensive care unit by bedside) in terms of their association with procedure-related major complications and procedure time.

DATA SOURCES

We searched PubMed and Cochrane register of randomized active comparator trials.

DATA EXTRACTION AND SYNTHESIS

A network comparative meta-analysis was performed in Stata using frequentist methodology. Major complications were defined as a composite of a priori-selected procedure-related complications. Tracheostomy techniques that did not require any direct bronchoscopic or ultrasonographic visualization of the entire procedure were grouped under the heading-anatomic landmark-based dilatational tracheostomy (ALDT). This along with bronchoscopic-guided dilatational tracheostomy (BDT), ultrasound-guided (UDT), and surgical tracheostomy (SGT) were compared with each other using network meta-analysis in Stata after all major assumptions (similarity, transitivity, and consistency) for performing a network were met. Log odds ratio (and standard errors) of the comparison of major complications between any two tracheostomy techniques (using indirect estimates) was statistically insignificant. Pairwise meta-analysis showed significant differences in procedure times between SGT and ALDT [mean difference: 9.96 min (SE 3.18)] and between SGT and BDT [15.67 min (SE 3.85)]. The indirect network meta-analysis comparing one versus the other also showed a statistically significant time difference between surgical tracheostomy when compared with every other technique.

CONCLUSIONS

The results of our network meta-analysis show that all tracheostomy techniques are comparable with respect to associated procedure-related complications, but all three percutaneous techniques take far less procedure time compared to the surgical tracheostomy.

Does Real Time Ultrasonography Confer Any Benefit During Bronchoscopy Guided Percutaneous Tracheostomy: A Preliminary, Randomized Controlled Trial

Background

There are studies comparing USG guided percutaneous dilatational tracheostomy (PDT) with bronchoscopy guided PDT. We have compared USG guided PDT to conventional landmark guided PDT using bronchoscopy in both the groups.

Objective

The primary outcome was the time of procedure and the secondary outcome was incidence of complications in USG guided PDT in comparision to the conventional PDT.

Materials and Methods

Seventy adult patients were randomly allocated in two groups, i.e., conventional landmark percutaneous dilatational tracheostomy (PDT) and ultrasonography (USG) guided PDT. Demographic data, injury severity score, time taken for the procedure, attempts of tracheal puncture, major and minor complications, and outcome were compared.

Results

The median time taken for the procedure was 12 minutes [min., max.; 8, 20] in conventional group 1 and 16 minutes [9, 24] in group 2 (USG guided) which was statistically significant. Minor bleeding was seen in 7 (20%) patients in group 1 and only in 4 patients (11.5%) in group 2. The rate of other complications and the long term outcome were similar in both the groups.

Conclusion

The use of real time USG during PDT may confer advantage over conventional PDT when using bronchoscopy in terms of decreasing the incidence of minor bleeding but duration of the procedure gets prolonged.

How to cite this article

Aggarwal R, Soni KD, Goyal K, Singh GP, Sokhal N, Trikha A. Does Real Time Ultrasonography Confer Any Benefit During Bronchoscopy Guided Percutaneous Tracheostomy: A Preliminary, Randomized Controlled Trial. Indian J Crit Care Med 2019;23(5):236–238.

Unassisted percutaneous tracheostomy: A new flow chart decision making based on simple physical conditions

INTRODUCTION

Percutaneous dilatation tracheostomy (PDT) has several advantages over traditional surgical tracheostomy. However, it is still performed using bronchoscopy guidance.

OBJECTIVE

To suggest the safety of unassisted PDT, without bronchoscopy guidance, based on bed-side screening flow chart evaluation.

MATERIAL AND METHODS

180 consecutive UCI patients referred to tracheostomy were submitted to Avalo's Screening Chart (ASC), in order to decide surgical technique.

RESULTS

161 patients were referred to unassisted PDT (un PDT) and 19 to surgical tracheostomy (ST) due to nonfulfillment of ASC steps. 10 patients submitted to unassisted PDT presented early complications, 8 presented mild bleeding and 2 false tracts. None of 6 months follow up patients presented long term complications.

CONCLUSION

The authors suggest unPDT is a safety surgical method in UCI patients who were submitted and approved to an easy anatomical and clinical screening chart (ASC).

The Use of Point-of-Care Ultrasonography in Trauma Anesthesia

Caring for the trauma patient requires an in-depth knowledge of the pathophysiology of trauma, the ability to rapidly diagnose and intervene to reverse the derangements caused by shock states, and an aptitude for the use of advanced monitoring techniques and perioperative point-of-care ultrasonography (P-POCUS) to assist in diagnosis and delivery of care. Historically, anesthesiology has lagged behind in wholly embracing this technology. P-POCUS has the potential to allow the trauma anesthesiologist to diagnose numerous injuries, quickly guide the placement of central vascular catheters and invasive monitors, and assess the efficacy of interventions.

Tracheotomy in the intensive care unit: Guidelines from a French expert panel: The French Intensive Care Society and the French Society of Anaesthesia and Intensive Care Medicine

Tracheotomy is widely used in intensive care units, albeit with great disparities between medical teams in terms of frequency and modality. Indications and techniques are, however, associated with variable levels of evidence based on inhomogeneous or even contradictory literature. Our aim was to conduct a systematic analysis of the published data in order to provide guidelines. We present herein recommendations for the use of tracheotomy in adult critically ill patients developed using the grading of recommendations assessment, development and evaluation (GRADE) method. These guidelines were conducted by a group of experts from the French Intensive Care Society (Société de réanimation de langue française) and the French Society of Anesthesia and Intensive Care Medicine (Société francaise d'anesthésie réanimation) with the participation of the French Emergency Medicine Association (Société française de médecine d'urgence), the French Society of Otorhinolaryngology. Sixteen experts and two coordinators agreed to consider questions concerning tracheotomy and its practical implementation. Five topics were defined: indications and contraindications for tracheotomy in intensive care, tracheotomy techniques in intensive care, modalities of tracheotomy in intensive care, management of patients undergoing tracheotomy in intensive care, and decannulation in intensive care. The summary made by the experts and the application of GRADE methodology led to the drawing up of 8 formal guidelines, 10 recommendations, and 3 treatment protocols. Among the 8 formal guidelines, 2 have a high level of proof (Grade 1±) and 6 a low level of proof (Grade 2±). For the 10 recommendations, GRADE methodology was not applicable and instead 10 expert opinions were produced.

Tracheotomy in the intensive care unit: guidelines from a French expert panel

Tracheotomy is widely used in intensive care units, albeit with great disparities between medical teams in terms of frequency and modality. Indications and techniques are, however, associated with variable levels of evidence based on inhomogeneous or even contradictory literature. Our aim was to conduct a systematic analysis of the published data in order to provide guidelines. We present herein recommendations for the use of tracheotomy in adult critically ill patients developed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) method. These guidelines were conducted by a group of experts from the French Intensive Care Society (Société de Réanimation de Langue Française) and the French Society of Anesthesia and Intensive Care Medicine (Société Francaise d'Anesthésie Réanimation) with the participation of the French Emergency Medicine Association (Société Française de Médecine d'Urgence), the French Society of Otorhinolaryngology. Sixteen experts and two coordinators agreed to consider questions concerning tracheotomy and its practical implementation. Five topics were defined: indications and contraindications for tracheotomy in intensive care, tracheotomy techniques in intensive care, modalities of tracheotomy in intensive care, management of patients undergoing tracheotomy in intensive care, and decannulation in intensive care. The summary made by the experts and the application of GRADE methodology led to the drawing up of 8 formal guidelines, 10 recommendations, and 3 treatment protocols. Among the 8 formal guidelines, 2 have a high level of proof (Grade 1+/-) and 6 a low level of proof (Grade 2+/-). For the 10 recommendations, GRADE methodology was not applicable and instead 10 expert opinions were produced.

Ultrasound-Guided Percutaneous Dilational Tracheostomy: A Systematic Review of Randomized Controlled Trials and Meta-Analysis

INTRODUCTION

Percutaneous dilational tracheostomy (PDT) is a common and increasingly used procedure in the intensive care unit (ICU). It is usually performed with bronchoscopy guidance. Ultrasound has emerged as a useful tool in order to assist PDT, potentially improving its success rate and reducing procedural-related complications.

OBJECTIVE

To investigate whether the ultrasound-guided PDT is equivalent or superior to the bronchoscopy-guided or anatomical landmarks-guided PDT with regard to procedural-related and clinical complications.

METHODS

A systematic review of randomized clinical trials was conducted comparing an ultrasound-guided PDT to the control groups (either a bronchoscopy-guided PDT or an anatomical landmark-guided PDT) in patients undergoing a PDT in the ICU. The primary outcome was the incidence of major procedural-related and clinical complication rates. The secondary outcome was the incidence of minor complication rates. Random-effect meta-analyzes were used to pool the results.

RESULTS

Four studies fulfilled the inclusion criteria and they were analyzed. The studies included 588 participants. There were no differences in the major complication rates between the patients who were assigned to the ultrasound-guided PDT when compared to the control groups (pooled risk ratio [RR]: 0.48; 95% confidence interval [CI]: 0.13-1.71, I² = 0%). The minor complication rates were not different between the groups, but they had a high heterogeneity (pooled RR: 0.49; 95% CI 0.16-1.50; I² = 85%). The sensitivity analyzes that only included the randomized controlled trials that used a landmark-guided PDT as the control group showed lower rates of minor complications in the ultrasound-guided PDT group (pooled RR: 0.55; 95% CI: 0.31-0.98, I² = 0%).

CONCLUSION

The ultrasound-guided PDT seems to be safe and it is comparable to the bronchoscopy-guided PDT regarding the major and minor procedural-related or clinical complications. It also seems to reduce the minor complications when compared to the anatomical landmark-guided PDT.

Point-of-care ultrasound (POCUS) of the upper airway

Airway management is a critical skill in the practice of several medical specialities including anesthesia, emergency medicine, and critical care. Over the years mounting evidence has showed an increasing role of ultrasound (US) in airway management. The objective of this narrative review is to provide an overview of the indications for point-of-care ultrasound (POCUS) of the upper airway. The use of US to guide and assist clinical airway management has potential benefits for both provider and patient. Ultrasound can be utilized to determine airway size and predict the appropriate diameter of single-lumen endotracheal tubes (ETTs), double-lumen ETTs, and tracheostomy tubes. Ultrasonography can differentiate tracheal, esophageal, and endobronchial intubation. Ultrasonography of the neck can accurately localize the cricothyroid membrane for emergency airway access and similarly identify tracheal rings for US-guided tracheostomy. In addition, US can identify vocal cord dysfunction and pathology before induction of anesthesia. A rapidly growing body of evidence showing ultrasonography used in conjunction with hands-on management of the airway may benefit patient care. Increasing awareness and use of POCUS for many indications have resulted in technologic advancements and increased accessibility and portability. Upper airway POCUS has the potential to become the first-line non-invasive adjunct assessment tool in airway management.

Evidence-based guides in tracheostomy use in critical patients

OBJECTIVES

Provide evidence based guidelines for tracheostomy in critically ill adult patients and identify areas needing further research.

METHODS

A task force composed of representatives of 10 member countries of the Pan-American and Iberic Federation of Societies of Critical and Intensive Therapy Medicine and of the Latin American Critical Care Trial Investigators Network developed recommendations based on the Grading of Recommendations Assessment, Development and Evaluation system.

RESULTS

The group identified 23 relevant questions among 87 issues that were initially identified. In the initial search, 333 relevant publications were identified of which 226 publications were chosen. The task force generated a total of 19 recommendations: 10 positive (1B=3, 2C=3, 2D=4) and 9 negative (1B=8, 2C=1). A recommendation was not possible in six questions.

CONCLUSION

Percutaneous techniques are associated with a lower risk of infections compared to surgical tracheostomy. Early tracheostomy only seems to reduce the duration of ventilator use but not the incidence of pneumonia, the length of stay, or the long-term mortality rate. The evidence does not support the use of routine bronchoscopy guidance or laryngeal masks during the procedure. Finally, proper prior training is as important or even a more significant factor in reducing complications than the technique used.

Comparison of Bronchoscopy-Guided and Real-Time Ultrasound-Guided Percutaneous Dilatational Tracheostomy: Safety, Complications, and Effectiveness in Critically Ill Patients

OBJECTIVE

To compare the efficacy, safety, and incidence of complications between fiber-optic bronchoscopy-guided percutaneous dilatational tracheostomy (FOB-PDT) and ultrasound-guided percutaneous dilatational tracheostomy (US-PDT) and to determine whether US-PDT is a viable alternative to FOB-PDT.

METHODS

This randomized prospective study was carried out in 80 patients who were randomly divided into US-PDT and FOB-PDT groups. Demographic data and Acute Physiology and Chronic Health Evaluation II (APACHE II), procedure duration, hemorrhage status, complications, procedure difficulty, displacement of entry location after US, and hemodynamic data were evaluated in both groups. Tracheal incision was performed with real-time US and a transverse probe position in the out-of-plane mode.

RESULTS

No significant differences were observed between the 2 groups in terms of demographic data, oral intubation time, APACHE II values, difficulty of the procedure, or the number of needle interventions ( P > .05). The mean hemorrhage ratio of the FOB-PDT group was significantly higher than that of the US-PDT group ( P < .05). The entry location was changed in 6 patients in the US-PDT group following neck examination with US. The mean duration of the procedure for the FOB-PDT group was significantly longer than that for the US-PDT group ( P < .05).

CONCLUSION

Ultrasound-guided percutaneous dilatational tracheostomy is a safe procedure for critically ill patients and has the advantages of a low complication rate, short duration of procedure, being informative with regard to neck anatomy, and facilitating prevention of vascular puncture. Thus, US-PDT can be used as an alternative to FOB-PDT.

Evidence-based guidelines for the use of tracheostomy in critically ill patients

OBJECTIVES

To provide evidence-based guidelines for tracheostomy in critically ill adult patients and identify areas needing further research.

METHODS

A taskforce composed of representatives of 10 member countries of the Pan-American and Iberic Federation of Societies of Critical and Intensive Therapy Medicine and of the Latin American Critical Care Trial Investigators Network developed recommendations based on the Grading of Recommendations Assessment, Development and Evaluation system.

RESULTS

The group identified 23 relevant questions among 87 issues that were initially identified. In the initial search, 333 relevant publications were identified, of which 226 publications were chosen. The taskforce generated a total of 19 recommendations, 10 positive (1B, 3; 2C, 3; 2D, 4) and 9 negative (1B, 8; 2C, 1). A recommendation was not possible in 6 questions.

CONCLUSIONS

Percutaneous techniques are associated with a lower risk of infections compared with surgical tracheostomy. Early tracheostomy only seems to reduce the duration of ventilator use but not the incidence of pneumonia, the length of stay, or the long-term mortality rate. The evidence does not support the use of routine bronchoscopy guidance or laryngeal masks during the procedure. Finally, proper prior training is as important or even a more significant factor in reducing complications than the technique used.

The Changing Role for Tracheostomy in Patients Requiring Mechanical Ventilation

Tracheostomy is performed in patients who require prolonged mechanical ventilation or have upper airway instability. Percutaneous tracheostomy with Ciaglia technique is commonly used and rivals the surgical approach. Percutaneous technique is associated with decreased risk of stomal inflammation, infection, and bleeding along with reduction in health resource utilization when performed at bedside. Bronchoscopy and ultrasound guidance improve the safety of percutaneous tracheostomy. Early tracheostomy decreases the need for sedation and intensive care unit stay but may be unnecessary in some patients who can be extubated later successfully. A multidisciplinary approach to tracheostomy care leads to improved outcomes.

Percutaneous dilatational tracheostomy (PDT) in trauma patients: a safe procedure

PURPOSE

Percutaneous dilatational tracheostomy (PDT) is a standard procedure routinely performed on intensive care units. While complication rates and long-term outcomes have been studied in different patient populations, there are few studies known to these authors involving PDT in trauma patients and the complications which may result.

METHODS

Between March 2007 and August 2013, all instances and peri-procedural complications during PDT occurring on the trauma intensive care unit, a unit specialized in the care of injured patients and especially polytrauma patients, were documented. PDTs were performed by a surgeon with the assistance and supervision of another, using bronchoscopic guidance performed by the respiratory medicine department.

RESULTS

289 patients were included in the study, 225 men and 64 women with a mean age of 49 ± 21 years. Complications occurred in 37.4 % of cases. The most common complication, bleeding, occurred in 26.3 % of patients ranging from little to severe bleeding. Fracture of tracheal cartilage occurred in 6 % of PDT cases. Additional complications such as dislocation of the guidewire, hypotension, and oxygen desaturation were observed. Most complications did not require treatment. The second tracheal intercartilaginous space was successfully intubated in 82 % of cases.

CONCLUSIONS

PDT is a safe procedure in trauma patients. When considering the severity of complications such as major blood loss, pneumothorax, or death, this evidence suggests that PDT is safer in trauma patients compared to other patient cohorts.

A modified technique for percutaneous dilatational tracheostomy: A retrospective review of 60 cases

BACKGROUND

We describe a modified technique for percutaneous dilatational tracheostomy (PDT) using intermittent bronchoscopy and ultrasound (US). This method requires 1 single physician operator and no special airway adjuncts. Our aim is to reduce the complications associated with the current popular PDT technique, that is, accidental intraprocedural airway loss, intraprocedural bleeding, and hypoventilation associated with use of continuous bronchoscopy.

STUDY DESIGN

This is a retrospective review of all PDTs performed on intensive care unit patients at a single nonacademic hospital by a pulmonologist using the modified PDT technique.

RESULTS

Sixty consecutive PDT procedures were performed using the modified technique. Forty-five percent of the patients were considered high-risk individuals for PDT. There were no deaths from the modified PDT procedure. There were no major complications including accidental extubation, major bleeding, posterior tracheal wall laceration, pneumothorax, hemodynamic instability, severe hypoxemia, or infection. The failure rate of PDT was 1.6%. There was no puncture of the bronchoscope, endotracheal tube, or endotracheal tube balloon. All procedures were performed by 1 single physician operator.

CONCLUSION

Our modified technique demonstrates a potential to reduce accidental intraprocedural airway loss and intraoperative bleeding associated with PDT while possibly improving gas exchange and saving procedural costs. This technique needs to be comparatively studied with current popular PDT technique in a prospective trial to firmly establish associated risks and benefits.

Use of ultrasound guidance to improve the safety of percutaneous dilatational tracheostomy: a literature review

Patients in ICUs frequently require tracheostomy for long-term ventilator support, and the percutaneous dilatational tracheostomy (PDT) method is preferred over surgical tracheostomy. The use of ultrasound (US) imaging to guide ICU procedures and interventions has recently emerged as a simple and noninvasive tool. The current evidence regarding the applications of US in PDT is encouraging; however, the exact role of US-guided dilatational tracheostomy (US-PDT) remains poorly defined. In this review, we describe the best available evidence concerning the safety and efficacy of US-PDT and briefly delineate the general principles of US image generation for the airway and of US-PDT procedures.

Impact of real-time ultrasound guidance on complications of percutaneous dilatational tracheostomy: a propensity score analysis

Introduction

Recent studies have demonstrated the feasibility of real-time ultrasound guidance during percutaneous dilatational tracheostomy, including in patients with risk factors such as coagulopathy, cervical spine immobilization and morbid obesity. Use of real-time ultrasound guidance has been shown to improve the technical accuracy of percutaneous dilatational tracheostomy; however, it is unclear if there is an associated reduction in complications. Our objective was to determine whether the peri-procedural use of real-time ultrasound guidance is associated with a reduction in complications of percutaneous dilatational tracheostomy using a propensity score analysis.

Methods

This study reviewed all percutaneous dilatational tracheostomies performed in an 8-year period in a neurocritical care unit. Percutaneous dilatational tracheostomies were typically performed by trainees under guidance of the attending intensivist. Bronchoscopic guidance was used for all procedures with addition of real-time ultrasound guidance at the discretion of the attending physician. Real-time ultrasound guidance was used to guide endotracheal tube withdrawal, guide tracheal puncture, identify guidewire entry level and confirm bilateral lung sliding. The primary outcome was a composite of previously defined complications including (among others) bleeding, infection, loss of airway, inability to complete procedure, need for revision, granuloma and early dislodgement. Propensity score analysis was used to ensure that the relationship of not using real-time ultrasound guidance with the probability of an adverse outcome was examined within groups of patients having similar covariate profiles. Covariates included were age, gender, body mass index, diagnosis, Acute Physiology and Chronic Health Evaluation II score, timing of tracheostomy, positive end-expiratory pressure and presence of risk factors including coagulopathy, cervical spine immobilization and prior tracheostomy.

Results

A total of 200 patients underwent percutaneous dilatational tracheostomy during the specified period, and 107 received real-time ultrasound guidance. Risk factors for percutaneous dilatational tracheostomy were present in 63 (32%). There were nine complications in the group without real-time ultrasound guidance: bleeding (n = 4), need for revision related to inability to ventilate or dislodgement (n = 3) and symptomatic granuloma (n = 2). There was one complication in the real-time ultrasound guidance group (early dislodgement). The odds of having an adverse outcome for patients receiving real-time ultrasound guidance were significantly lower (odds ratio = 0.08; 95% confidence interval, 0.009 to 0.811; P = 0.032) than for those receiving a standard technique while holding the propensity score quartile fixed.

Conclusions

The use of real-time ultrasound guidance during percutaneous dilatational tracheostomy was associated with a significant reduction in procedure-related complications.