Complications of needle thoracostomy: A comprehensive clinical review

Effectiveness of prehospital chest decompression in resolving clinical signs of tension pneumothorax

BACKGROUND

Thoracic injuries are a leading cause of morbidity and mortality in military trauma. Tension pneumothorax (TPX) is a critical diagnosis that can lead to rapid hemodynamic and respiratory collapse if untreated. While timely intervention is essential, prehospital TPX diagnosis is challenging and may lead to unnecessary interventions. This study aimed to assess military prehospital chest injury management, including indications for chest decompression and clinical improvement post-intervention.

STUDY DESIGN AND METHODS

Retrospective analysis of the Israel Defense Forces (IDF) Trauma Registry from January 2010 to August 2023 identifying patients who underwent needle or chest tube decompression. Data included demographics, injury mechanisms, vital signs, additional interventions, and prehospital mortality. Chart review evaluated decompression indications and outcomes, with the primary outcome being resolution of decreased oxygen saturation, tachycardia, or hypotension post-decompression.

RESULTS

Overall, 224 patients were included, with a median age of 22 years. The most common injury mechanisms were gunshots (36.6%) and motor vehicle accidents (34.4%). Needle chest decompression was performed in 58.5% of cases, chest tubes in 12.5%, and both in 29.0%. Indications included traumatic cardiac arrest (53.1%), profound shock (17.9%), and SpO2 < 85% (13.8%). In 15.2% of cases, decompression did not meet the IDF guideline criteria. Only three cases (1.3%) showed resolution of tachycardia, hypotension, or low oxygen saturation. In five cases, vital signs briefly returned after traumatic cardiac arrest, but none survived to hospital admission.

DISCUSSION

Chest decompression may be overutilized in prehospital military trauma. Future studies should refine criteria to optimize benefits while minimizing iatrogenic risks.

Who Says You can't go FAST at Night? Use of a Novel Ultrasound-Capable Night Vision Device for Prehospital Medical Personnel to Identify Noncompressible Truncal Hemorrhage

BACKGROUND

Early detection of abdominal hemorrhage via ultrasound has life-saving implications for military and civilian trauma. However, strict adherence to light discipline may prohibit the use of ultrasound devices in the deployed setting. Additionally, current night vision devices remain noncompatible with ultrasound technology. This study sought to assess an innovative night vision device with ultrasound capable picture-in-picture display via a intraabdominal hemorrhage model to identify noncompressible truncal hemorrhage in blackout conditions.

METHODS

8 post mortem fetal porcine specimens were used and divided into 2 groups: intrabdominal hemorrhage (n = 4) vs no hemorrhage (n = 4). Intrabdominal hemorrhage was modeled via direct injection of 200 mL of normal saline into the peritoneal cavity. Under blackout conditions, 5 participants performed a focused assessment with sonography for trauma (FAST) exam on each model using the prototype ultrasound-capable night vision device.

RESULTS

Of the 40 FAST exams performed, 95% (N = 38) resulted in the correct identification of intraabdominal hemorrhage. Of the incorrectly identified exams, both were false positives resulting in a 100% sensitivity, 90% specificity, 91% positive predictive value, and a 100% negative predictive value. All participants noted the novel device was easy to use and provided superior visualization for performing FAST exams under blackout conditions.

CONCLUSION

The ultrasound-enabled night vision prototype demonstrated promising results in identifying noncompressible truncal hemorrhage while maintaining strict light discipline in blackout conditions. Further research efforts should be directed at assessing the ability of providers to perform procedures in blackout conditions using the ultrasound-enabled prototype night vision device.

Prehospital Trauma Compendium: Traumatic Pneumothorax Care - a position statement and resource document of NAEMSP

Emergency Medical Services (EMS) clinicians manage patients with traumatic pneumothoraces. These may be simple pneumothoraces that are less clinically impactful, or tension pneumothoraces that disturb perfusion, lead to shock, and impart significant risk for morbidity and mortality. Needle thoracostomy is the most common EMS treatment of tension pneumothorax, but despite the potentially life-saving value of needle thoracostomy, reports indicate frequent misapplication of the procedure as well as low rates of successful decompression. This has led some to question the value of prehospital needle thoracostomy and has prompted consideration of alternative approaches to management (e.g., simple thoracostomy, tube thoracostomy). EMS clinicians must determine when pleural decompression is indicated and optimize the safety and effectiveness of the procedure. Further, there is also ambiguity regarding EMS management of open pneumothoraces. To provide evidence-based guidance on the management of traumatic pneumothoraces in the EMS setting, NAEMSP performed a structured literature review and developed the following recommendations supported by the evidence summarized in the accompanying resource document.NAEMSP recommends:EMS identification of a tension pneumothorax must be guided by a combination of risk factors and physical findings, which may be augmented by diagnostic technologies.EMS clinicians should recognize the differences in the clinical presentation of a tension pneumothorax in spontaneously breathing patients and in patients receiving positive pressure ventilation.EMS clinicians should not perform pleural decompression in patients with simple pneumothoraces but should perform pleural decompression in patients with tension pneumothorax, if within the clinician's scope of practice.When within scope of practice, EMS clinicians should use needle thoracostomy as the primary strategy for pleural decompression of tension pneumothorax in most cases. EMS clinicians should take a patient-individualized approach to performing needle thoracostomy, influenced by factors known to impact chest wall thickness and risk for iatrogenic injury.Simple thoracostomy and tube thoracostomy may be used by highly trained EMS clinicians in select clinical settings with appropriate medical oversight and quality assurance.EMS systems must investigate and adopt strategies to confirm successful pleural decompression at the time thoracostomy is performed.Pleural decompression should be performed for patients with traumatic out-of-hospital circulatory arrest (TOHCA) if there are clinical signs of tension pneumothorax or suspicion thereof due to significant thoraco-abdominal trauma. Empiric bilateral decompression, however, is not routinely indicated in the absence of such findings.EMS clinicians should not routinely perform pleural decompression of suspected or confirmed simple pneumothorax prior to air-medical transport in most situations.EMS clinicians may consider placement of a vented chest seal in spontaneously breathing patients with open pneumothoraces.In patients receiving positive pressure ventilation who have open pneumothoraces, chest seals may be harmful and are not recommended.EMS physicians play an important role in developing curricula and leading quality management programs to both ensure that EMS clinicians are properly trained in the recognition and management of tension pneumothorax and to ensure that interventions for tension pneumothorax are performed appropriately, safely, and effectively.

Needlessly Treated: Evaluation of Prehospital Needle Thoracostomy

BACKGROUND

Needle thoracostomy is a potentially life-saving intervention for tension pneumothorax but may be overused, potentially leading to unnecessary morbidity.

OBJECTIVE

To review prehospital needle thoracostomy indications, effectiveness, and adverse outcomes.

METHODS

A retrospective cohort study was conducted based on registry data for a United States Midwestern Level I trauma center for a 7.5-year period (January 2015 to May 2022). Included were patients who received prehospital needle thoracostomy and trauma activation before hospital arrival. The primary outcomes were correct indications and improvement in vital signs. Secondary outcomes were the need for chest tubes, correct needle placement, complications, and survival.

RESULTS

A total of n = 67 patients were reviewed, of which n = 63 (94%) received a prehospital thoracostomy. Of the 63 prehospital thoracostomies, 54 (86%) survived to arrival. Of these 54, 44 (n = 81%) had documented reduced/absent breath sounds, 15 (28%) hypotension, and 19 (35%) with difficulty breathing/ventilating. Only four patients met all three prehospital trauma life support criteria: hypotension, difficulty ventilating, and absent breath sounds. There were no significant changes in prehospital vitals before and after receiving needle thoracostomy. In patients receiving imaging (n = 54), there was evidence of 15 (28%) lung lacerations, 6 (11%) of which had a pneumothorax and 3 (5%) near misses of important structures. Review of needle catheters visible on computer tomography imaging found 11 outside the chest and 1 in the abdominal cavity.

CONCLUSION

The study presents evidence of potential needle thoracostomy overuse and morbidity. Adherence to specific guidelines for needle decompression is needed.

Prehospital Needle Decompression of Suspected Tension Pneumothorax: Outcomes and Consequences

Tension pneumothorax (TPT) identified in the prehospital setting requires prehospital needle decompression (PHND). This study aimed to evaluate complications from PHND when it was performed without meeting clinical criteria. A retrospective review was performed of patients undergoing (PHND) from 2016 through 2022 at a level 1 trauma center. Patient data who received PHND were reviewed. Of 115 patients, 85 did not meet at least one clinical criterion for PHND. The majority of patients in this cohort 76 (89%) required a chest tube and 22 (25%) had an iatrogenic pneumothorax from PHND. 5 patients (6%) were admitted due to iatrogenic PHND. Two vascular injuries in this population were directly due to PHND and required emergency operative repair. This study shows the negative consequences of PHND when performed without clear indications. Several patients underwent unnecessary procedures with significant clinical consequences.

A Retrospective Analysis of Needle Thoracostomies at a Tertiary Level 2 Trauma Center

BACKGROUND

A tension pneumothorax is a condition that results in elevated pressure within the pleural space. The effective management of tension pneumothorax relies on needle decompression, commonly performed at the second intercostal space (ICS) midclavicular line (MCL). However, some literature suggests that catheters placed in the second intercostal space midclavicular line are prone to higher failure rates compared to the fifth intercostal space midaxillary line (MAL) (42.5% versus 16.7%, respectively). In this study, we aim to identify and scrutinize the prevalence of prehospital needle decompression from one tertiary care center over eight years and examine their trends, efficacies, or pitfalls. It is hypothesized that preclinical providers are performing needle decompression prematurely and unnecessarily.

METHODS

A set of 90 patient records obtained using the trauma registry at Saint Francis Hospital, Tulsa, Oklahoma, were retrospectively reviewed to evaluate the management and outcomes of tension pneumothorax, as well as the indications documented for needle decompression. Patient charts were reviewed via Epic Hyperspace (Epic, Madison, WI). The Oklahoma Emergency Medical Service Information System (OKEMSIS) also provided information contributing to the sample population.

RESULTS

The most documented indications for needle decompressions included diminished or absent breath sounds (52.70%), hypoxia (15.54%), hypotension, and hemodynamic instability (6.76%). Emergency medical services (EMS) reported improvements in 51 (56.67%) patients after needle thoracostomy. Improvements in vital signs after needle decompression were sporadic. The most common complication was catheter dislodging, which occurred most in the second intercostal space midclavicular line. Only nine patients had an oxygen saturation (SpO2) below 92% and a systolic blood pressure (SBP) below 100 mm Hg prior to receiving needle decompression.

CONCLUSION

Current practices for tension pneumothorax show little improvement in vital signs before and after needle decompression. Vital signs prior to needle decompression often do not indicate tension pneumothorax physiology. Preclinical providers may be inappropriately performing needle decompressions, an invasive procedure with complications.

Implications for future humanitarian aid missions: Lessons from point-of injury and hospital care for Syrian refugees

BACKGROUND

Warzone humanitarian medical aid missions are infrequent and applying lessons from these missions is vital to ensuring preparedness for future crises. Between 2013-2018, the Israel Defense Forces Medical Corps (IDF-MC) provided humanitarian medical aid to individuals injured in the Syrian Civil War who chose to seek medical assistance at the Israeli-Syrian border. Patients requiring care surgical or advanced care were transferred to civilian medical centers within Israel. This study aims to describe the injury characteristics and management of hospitalized Syrian Civil War trauma patients over a five-year period.

METHODS

Retrospective cohort analysis cross-referencing data from the IDF trauma registry, documenting prehospital care, and the Israel National Trauma Registry, documenting in-hospital care, between 2013 and 2018. Syrian trauma patients hospitalized in Israeli hospitals were cross-referenced between the two registries. Multivariable logistic regression was applied to identify independent factors associated with in-hospital mortality.

RESULTS

Overall, 856 hospitalized trauma patients were included following definitive cross-matching. The median age was 23 years, and 93.3% were males. Blast (n = 532; 62.1%) and gunshot (n = 241; 28.2%) were the most common injury mechanisms. Injury Severity Score was ≥25 for 28.8% of patients and most common body regions with severe injury (Abbreviated Injury Scale≥3) were the head (30.7%) and thorax (25.0%). Intensive care unit admission was required for 40.1% of patients, and the median hospital stay was 13 days. In-hospital mortality was recorded for 73 (8.5%). Signs of shock upon emergency department admission and severe head injury were significantly associated with mortality in the adjusted model whereas age of <18 years was associated with decreased odds for in-hospital mortality.

CONCLUSIONS

Trauma patients hospitalized in Israel following injuries sustained in the Syrian Civil War were characterized by a high prevalence of blast injuries with concomitant involvement of several body regions. Future missions should ensure preparedness for complex multi-trauma, often involving the head, and ensure high intensive care and surgical capacities.

Chest and Thorax Injuries in Athletes

Injuries to the chest and thorax are rare, but when they occur, they can be life-threatening. It is important to have a high index of suspicion to be able to make these diagnoses when evaluating a patient with a chest injury. Often, sideline management is limited and immediate transport to a hospital is indicated.

Needle Decompression Causing Pericardial and Pulmonary Artery Injuries in Patients With Blunt Trauma: Two Case Reports and Literature Review

Tension pneumothorax (TPX) is a severe chest complication of blunt or penetrating trauma. Immediate decompression is the lifesaving action in patients with TPX. Needle decompression (ND) is frequently used for this purpose, particularly in limited resources setting such as the prehospital arena. Despite the safe profile, the blind nature of the procedure can result in a serious range of complications, including injury to the vital intrathoracic structures such as the lungs, great vessels, and heart. Here, we reported 2 cases of blunt chest trauma resulting in TPX demanding immediate ND; however, nonintentional pericardial and pulmonary artery injuries occurred. The first case was a 42-year-old man with a needle-related pulmonary artery injury that required surgery. The second case was a 19-year-old man in whom a needle-related pneumopericardium occurred and was treated conservatively. In both cases, trained personnel performed the ND. Although ND in the field is a lifesaving intervention, it may further complicate the patient condition. Therefore, it should be performed in adherence to the universal guidelines.

Fatal Pyopneumothorax in a COVID-19 Patient

The COVID-19 pandemic has impacted every aspect of our lives since its start in December 2019. Among various COVID-19 complications, pleural complications are also increasingly reported but rarely from Nepal. Here, we presented a case of pyopneumothorax in a 52-year-old male patient referred from another center and admitted to the ICU of Nepal Armed Police Force Hospital with a diagnosis of severe COVID-19 pneumonia in the background of alcohol withdrawal syndrome with delirium tremens and generalized tonic-clonic seizures. He developed a rapid decline in respiratory status with a right-sided pneumothorax and underwent an immediate needle thoracostomy, followed by chest tube insertion. On the sixth day of admission, he had thick yellowish pus in the chest drain (pyopneumothorax), and despite the rigorous efforts in treatment, he died on the 15th day of admission. Though relatively uncommon, clinicians should consider pleural complications like pneumothorax, pleural effusion, pneumomediastinum, and empyema in patients with impaired immune status. In such patients, we should ensure prompt diagnosis with the earliest intervention and rationale use of antibiotics.

Endpoints in Vital Signs as a Useful Tool for Measuring Successful Needle Decompression After Traumatic Tension Pneumothorax: An Analysis of the National Emergency Medicine Information System Database

Background Needle decompression is a useful tool in the pre-hospital setting for treating tension pneumothorax. However the specific improvements in vital signs that determine a successful decompression are only reported in a few studies and Emergency Medical Services (EMS) self-reported assessments of improvement are more commonplace. We hypothesize that EMS reports may exaggerate improvement when compared to objective vital sign changes. Methodology This is a retrospective cohort study using the National Emergency Medicine Information System (NEMSIS) for the year 2020. Vital signs recorded as objective endpoints include systolic blood pressure (SBP), pulse (HR), respiratory rate (RR), and oxygen saturation (SpO₂). Univariate analysis was performed using the t-test for continuous variables and the chi-square test for categorical variables. Results A total of 8,219 calls were included in the sample size analyzed. Most patients were white (2,911, 35.4%) and male (6,694, 81.4%). Abnormal vitals recorded as indications for needle decompression included SBP <100 mmHg, HR <60 or >100 beats/minute, RR <12 or >20 breaths/minute, and SpO₂ <93%. Statistically significant improvements were seen in the number of abnormal vital signs after the procedure. The percentage of improvement was higher in the EMS self-reported assessment than in objective findings for oxygen saturation and SBP. Conclusions Our analysis shows objective improvement of hypoxia and hypotension after field needle decompression, supporting the efficacy of the procedure. The improvement based on vital sign change is modest and is less than that reported by EMS assessment of global improvement. This represents a target for quality improvement in EMS practice.

Paramedic Understanding of Tension Pneumothorax and Needle Thoracostomy (NT) Site Selection

Introduction

Tension pneumothorax is an immediate threat to life. Treatment in the prehospital setting is usually achieved by needle thoracostomy (NT). Prehospital personnel are taught to perform NT, frequently in the second intercostal space (ICS) at the mid-clavicular line (MCL). Previous literature has suggested that emergency physicians have difficulty identifying this anatomic location correctly. We hypothesized that paramedics would also have difficulty accurately identifying the proper location for NT.

Methods

A prospective, observational study was performed to assess paramedic ability to identify the location for treatment with NT. Participants were recruited during a statewide Emergency Medical Services (EMS) conference. Subjects were asked the anatomic site for NT and asked to mark the site on a shirtless male volunteer. The site was copied onto a transparent sheet lined up against predetermined points on the volunteer’s chest. It was then compared against the correct location that had been identified using palpation, measuring tape, and ultrasound.

Results

29 paramedics participated, with 24 (83%) in practice for more than five years and 23 (79%) doing mostly or all 9-1-1 response. All subjects (100%) reported training in NT, although six (21%) had never performed a NT in the field. Nine paramedics (31%) recognized the second ICS at the MCL as the desired site for NT, with 12 (41%) specifying only the second ICS, 11 (38%) specifying second or third ICS, and six (21%) naming a different location (third, fourth, or fifth ICS). None (0%) of the 29 paramedics identified the exact second ICS MCL on the volunteer. Mean distance from the second ICS MCL was 1.37 cm (interquartile range (IQR): 0.7-1.90) in the medial-lateral direction and 2.43 cm in the superior-inferior direction (IQR: 1.10-3.70). Overall mean distance was 3.12 cm from the correct location (IQR: 1.90-4.50). Most commonly, the identified location was too inferior (93%). Allowing for a 2 cm radius from the correct position, eight (28%) approximated the correct placement. 25 (86%) were within a 5 cm radius.

Conclusion

In this study, paramedics had difficulty identifying the correct anatomic site for NT. EMS medical directors may need to rethink training or consider alternative techniques.

Prehospital portable ultrasound for safe and accurate prehospital needle thoracostomy: a pilot educational study

Background

Simulated needle thoracostomy (NT) using ultrasound may reduce potential injury, increase accuracy, and be as rapid to perform as the traditional landmark technique following a brief educational session. Our objective was to determine if the use of an educational session demonstrating the use of handheld ultrasound to Emergency Medical Services (EMS) staff to facilitate NT was both feasible, and an effective way of increasing the safety and efficacy of this procedure for rural EMS providers.

Methods

A pre/post-educational intervention on a convenience sample of rural North American EMS paramedics and nurses. Measurement of location and estimated depth of placement of needle thoracostomy with traditional landmark technique was completed and then repeated using handheld ultrasound following a training session on thoracic ultrasound and correct placement of NT.

Results

A total of 30 EMS practitioners participated. Seven were female (23.3%). There was a higher frequency of dangerous structures underlying the chosen location with the landmark technique 9/60 (15%) compared to the ultrasound technique 1/60 (1.7%) (p = 0.08). Mean time-to-site-selection for the landmark technique was shorter than the ultrasound technique at 10.7 s (range 3.35–45 s) vs. 19.9 s (range 7.8–50 s), respectively (p < 0.001). There was a lower proportion of correct location selection for the landmark technique 40/60 (66.7%) when compared to the ultrasound technique 51/60 (85%) (p = 0.019). With ultrasound, there was less variance between the estimated and measured depth of the pleural space with a mean difference of 0.033 cm (range 0–0.5 cm) when ultrasound was used as compared to a mean difference of 1.0375 cm (range 0–6 cm) for the landmark technique (95% CI for the difference 0.73–1.27 cm; p < 0.001).

Conclusions

Teaching ultrasound NT was feasible in our cohort. While time-to-site-selection for ultrasound-guided NT took longer than the landmark technique, it increased safe and accurate simulated NT placement with fewer identified potential iatrogenic injuries.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13089-022-00270-w.

Complications associated with pre-hospital open thoracostomies: a rapid review

Background

Open thoracostomies have become the standard of care in pre-hospital critical care in patients with chest injuries receiving positive pressure ventilation. The procedure has embedded itself as a rapid method to decompress air or fluid in the chest cavity since its original description in 1995, with a complication rate equal to or better than the out-of-hospital insertion of indwelling pleural catheters. A literature review was performed to explore potential negative implications of open thoracostomies and discuss its role in mechanically ventilated patients without clinical features of pneumothorax.

Main findings

A rapid review of key healthcare databases showed a significant rate of complications associated with pre-hospital open thoracostomies. Of 352 thoracostomies included in the final analysis, 10.6% (n = 38) led to complications of which most were related to operator error or infection (n = 26). Pneumothoraces were missed in 2.2% (n = 8) of all cases.

Conclusion

There is an appreciable complication rate associated with pre-hospital open thoracostomy. Based on a risk/benefit decision for individual patients, it may be appropriate to withhold intervention in the absence of clinical features, but consideration must be given to the environment where the patient will be monitored during care and transfer. Chest ultrasound can be an effective assessment adjunct to rule in pneumothorax, and may have a role in mitigating the rate of missed cases.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13049-021-00976-1.

Prehospital paramedic pleural decompression: A systematic review

BACKGROUND

Tension pneumothorax (TPT) is a frequent life-threat following thoracic injury. Time-critical decompression of the pleural cavity improves survival. However, whilst paramedics utilise needle thoracostomy (NT) and/or finger thoracostomy (FT) in the prehospital setting, the superiority of one technique over the other remains unknown.

AIM

To determine and compare procedural success, complications and mortality between NT and FT for treatment of a suspected TPT when performed by paramedics.

METHODS

We searched four databases (Ovid Medline, PubMed, CINAHL and Embase) from their commencement until 25^th August 2020. Studies were included if they analysed patients suffering from a suspected TPT who were treated in the prehospital setting with a NT or FT by paramedics (or local equivalent nonphysicians).

RESULTS

The search yielded 293 articles after duplicates were removed of which 19 were included for final analysis. Seventeen studies were retrospective (8 cohort; 7 case series; 2 case control) and two were prospective cohort studies. Only one study was comparative, and none were randomised controlled trials. Most studies were conducted in the USA (n=13) and the remaining in Australia (n=4), Switzerland (n=1) and Canada (n=1). Mortality ranged from 12.5% to 79% for NT and 64.7% to 92.9% for FT patients. A higher proportion of complications were reported among patients managed with NT (13.7%) compared to FT (4.8%). We extracted three common themes from the papers of what constituted as a successful pleural decompression; vital signs improvement, successful pleural cavity access and absence of TPT at hospital arrival.

CONCLUSION

Evidence surrounding prehospital pleural decompression of a TPT by paramedics is limited. Available literature suggests that both FT and NT are safe for pleural decompression, however both procedures have associated complications. Additional high-quality evidence and comparative studies investigating the outcomes of interest is necessary to determine if and which procedure is superior in the prehospital setting.

Emergent needle thoracostomy in prehospital trauma patients: a review of procedural execution through computed tomography scans

Background

Traumatic tension pneumothoraces (TPT) are among the most serious causes of death in traumatic injuries, requiring immediate treatment with a needle thoracostomy (NT). Improperly placed NT insertion into the pleural cavity may fail to treat a life-threatening TPT. This study aimed to assess the accuracy of prehospital NT placements by paramedics in adult trauma patients.

Methods

A retrospective chart review was performed on 84 consecutive trauma patients who had received NT by prehospital personnel. The primary outcome was the accuracy of NT placement by prehospital personnel. Comparisons of various variables were conducted between those who survived and those who died, and proper versus improper needle insertion separately.

Results

Proper NT placement into the pleural cavity was noted in 27.4% of adult trauma patients. In addition, more than 19% of the procedures performed by the prehospital providers appeared to have not been medically indicated.

Discussion

Long-term strategies may be needed to improve the capabilities and performance of prehospital providers' capabilities in this delicate life-saving procedure.

Level of evidence

IV.

An experimental pleural drainage device in hypertensive pneumothorax

Purpose

To develop a specific device for pleural drainage in hypertensive pneumothorax.

Methods

The prototype was modeled from the free version of a 3D modeling application, printed on a 3D printer using ABS^® plastic material, and tested in a pleural drainage simulator.

Results

Pleural drainage in the simulator using the prototype was feasible and reproducible.

Conclusions

While the prototype is functional in the simulator, it requires improvement and refinement for use in humans.

Prehospital Decompression of Pneumothorax: A Systematic Review of Recent Evidence

INTRODUCTION

Pneumothorax remains an important cause of preventable trauma death. The aim of this systematic review is to synthesize the recent evidence on the efficacy, patient outcomes, and adverse events of different chest decompression approaches relevant to the out-of-hospital setting.

METHODS

A comprehensive literature search was performed using five databases (from January 1, 2014 through June 15, 2020). To be considered eligible, studies required to report original data on decompression of suspected or proven traumatic pneumothorax and be considered relevant to the prehospital context. They also required to be conducted mostly on an adult population (expected more than ≥80% of the population ≥16 years old) of patients. Needle chest decompression (NCD), finger thoracostomy (FT), and tube thoracostomy were considered. No meta-analysis was performed. Level of evidence was assigned using the Harbour and Miller system.

RESULTS

A total of 1,420 citations were obtained by the search strategy, of which 20 studies were included. Overall, the level of evidence was low. Eleven studies reported on the efficacy and patient outcomes following chest decompression. The most studied technique was NCD (n = 7), followed by FT (n = 5). Definitions of a successful chest decompression were heterogeneous. Subjective improvement following NCD ranged between 18% and 86% (n = 6). Successful FT was reported for between 9.7% and 32.0% of interventions following a traumatic cardiac arrest. Adverse events were infrequently reported. Nine studies presented only on anatomical measures with predicted failure and success. The mean anterior chest wall thickness (CWT) was larger than the lateral CWT in all studies except one. The predicted success rate of NCD ranged between 90% and 100% when using needle >7cm (n = 7) both for the lateral and anterior approaches. The reported risk of iatrogenic injuries was higher for the lateral approach, mostly on the left side because of the proximity with the heart.

CONCLUSIONS

Based on observational studies with a low level of evidence, prehospital NCD should be performed using a needle >7cm length with either a lateral or anterior approach. While FT is an interesting diagnostic and therapeutic approach, evidence on the success rates and complications is limited. High-quality studies are required to determine the optimal chest decompression approach applicable in the out-of-hospital setting.

A Pilot Study to Assess Urban, Fire-Based Paramedic Accuracy in Identification of Anatomical Landmarks Necessary for Cricothyrotomy and Needle Chest Decompression Using Live Patient Models

BACKGROUND

Cricothyrotomy and chest needle decompression (NDC) have a high failure and complication rate. This article sought to determine whether paramedics can correctly identify the anatomical landmarks for cricothyrotomy and chest NDC.

METHODS

A prospective study using human models was performed. Paramedics were partnered and requested to identify the location for cricothyrotomy and chest NDC (both mid-clavicular and anterior axillary sites) on each other. A board-certified or board-eligible emergency medicine physician timed the process and confirmed location accuracy. All data were collected de-identified. Descriptive analysis was performed on continuous data; chi-square was used for categorical data.

RESULTS

A total of 69 participants were recruited, with one excluded for incomplete data. The paramedics had a range of six to 38 (median 14) years of experience. There were 28 medical training officers (MTOs) and 41 field paramedics. Cricothyroidotomy location was correctly identified in 56 of 68 participants with a time to identification range of 2.0 to 38.2 (median 8.6) seconds. Chest NDC (mid-clavicular) location was correctly identified in 54 of 68 participants with a time to identification range of 3.4 to 25.0 (median 9.5) seconds. Chest NDC (anterior axillary) location was correctly identified in 43 of 68 participants with a time to identification range of 1.9 to 37.9 (median 9.6) seconds. Chi-square (2-tail) showed no difference between MTO and field paramedic in cricothyroidotomy site (P = .62), mid-clavicular chest NDC site (P = .21), or anterior axillary chest NDC site (P = .11). There was no difference in time to identification for any procedure between MTO and field paramedic.

CONCLUSION

Both MTOs and field paramedics were quick in identifying correct placement of cricothyroidotomy and chest NDC location sites. While time to identification was clinically acceptable, there was also a significant proportion that did not identify the correct landmarks.

A novel optical technology based on 690 nm and 850 nm wavelengths to assist needle thoracostomy

The sensitivity of pneumothorax diagnosis via handheld ultrasound is low, and there is no equipment suitable for use with life-threatening tension pneumothorax in a prehospital setting. This study proposes a novel technology involving optical fibers and near-infrared spectroscopy to assist in needle thoracostomy decompression. The proposed system via the optical fibers emitted dual wavelengths of 690 and 850 nm, allowing distinction among different layers of tissue in vivo. The fundamental principle is the modified Beer-Lambert law (MBLL) which is the basis of near-infrared tissue spectroscopy. Changes in optical density corresponding to different wavelengths (690 and 850 nm) and hemoglobin parameters (levels of Hb and HbO₂) were examined. The Kruskal-Wallis H test was used to compare the differences in parameter estimates among tissue layers; all p-values were < 0.001 relevant to 690 nm and 850 nm. In comparisons of Hb and HbO₂ levels relative to those observed in the vein and artery, all p-values were also < 0.001. This study proposes a new optical probe to assist needle thoracostomy in a swine model. Different types of tissue can be identified by changes in optical density and hemoglobin parameters. The aid of the proposed system may yield fewer complications and a higher success rate in needle thoracostomy procedures.

Recommended Essential Equipment for Basic Life Support and Advanced Life Support Ground Ambulances 2020: A Joint Position Statement

In continued support of establishing and maintaining a foundation for standards of care, our organizations remain committed to periodic review and revision of this position statement. This latest revision was created based on a structured review of the National Model EMS Clinical Guidelines Version 2.2 in order to identify the equipment items necessary to deliver the care defined by those guidelines. In addition, in order to ensure congruity with national definitions of provider scope of practice, the list is differentiated into BLS and ALS levels of service utilizing the National Scope of Practice-defined levels of Emergency Medical Responder (EMR) and Emergency Medical Technician (EMT) as BLS, and Advanced EMT (AEMT) and Paramedic as ALS. Equipment items listed within each category were cross-checked against recommended scopes of practice for each level in order to ensure they were appropriately dichotomized to BLS or ALS levels of care. Some items may be considered optional at the local level as determined by agency-defined scope of practice and applicable clinical guidelines. In addition to the items included in this position statement our organizations agree that all EMS service programs should carry equipment and supplies in quantities as determined by the medical director and appropriate to the agency's level of care and available certified EMS personnel and as established in the agency's approved protocols.

Complications from Needle Thoracostomy: Penetration of the Myocardium

We report a rare but serious complication of needle thoracostomy, penetration of the myocardium. Needle thoracostomy is typically performed in the prehospital setting or upon arrival in the emergency department for suspected tension pneumothorax. Needle decompression is generally taught and done anteriorly, in the 2^nd intercostal space on the midclavicular line (MCL). An alternative approach is laterally, along the anterior axillary line (AAL) in the 4^th intercostal space. Our case supports prior literature that the anterior MCL location has a low rate of efficacy to decompress the chest, as well as a high rate of complications. We recommend performing needle decompression laterally at the AAL whether in the field or in the emergency department.

Thoracostomy in children with severe trauma: An overview of the paediatric experience in Victoria, Australia

OBJECTIVE

Thoracic trauma is a leading cause of paediatric trauma deaths. Traumatic cardiac arrest, tension pneumothorax and massive haemothorax are life-threatening conditions requiring emergency and definitive pleural decompression. In adults, thoracostomy is increasingly preferred over needle thoracocentesis for emergency pleural decompression. The present study reports on the early experience of thoracostomy in children, to inform debate regarding the best approach for emergency pleural compression in paediatric trauma.

METHODS

Retrospective review of Ambulance Victoria and The Royal Children's Hospital Melbourne, Trauma Registry between August 2016 and February 2019 to identify children undergoing thoracostomy for trauma, either pre-hospital or in the ED.

RESULTS

Fourteen children aged 1.2-15 years underwent 23 thoracostomy procedures over the 31 month period. The majority of patients sustained transport-related injuries, and underwent thoracostomies for the primary indications of hypoxia and hypotension. Two children were in traumatic cardiac arrest. Ten children underwent needle thoracocentesis prior to thoracostomy, but all required thoracostomy to achieve the necessary definitive decompression. All patients were severely injured with multiple-associated serious injuries and median Injury Severity Score 35.5 (17-75), three of whom died from their injuries. Thoracostomy in our cohort had a low complication rate.

CONCLUSION

In severely injured children, thoracostomy is an effective and reliable method to achieve emergency pleural decompression, including in the young child. The technical challenges presented by children are real, but can be addressed by training to support a low complication rate. We recommend thoracostomy over needle thoracocentesis as the first-line intervention in children with traumatic cardiac arrest, tension pneumothorax and massive haemothorax. [Correction added on 23 September 2019 after first online publication: in the second sentence of the conclusion, the words "under review process" were mistakenly added and have been removed.].

Appropriate Needle Length for Emergent Pediatric Needle Thoracostomy Utilizing Computed Tomography

Objective: Needle thoracostomy is a life-saving procedure. Advanced Trauma Life Support guidelines recommend insertion of a 5 cm, 14-gauge needle for pneumothorax decompression. High-risk complications can arise if utilizing an inappropriate needle size. No study exist evaluating appropriate needle length in pediatric patients. Utilizing computed tomography (CT), we determined the needle length required to access the pleural cavity in children matched to Broselow™ Pediatric Emergency Tape color. Methods: Three investigators reviewed chest CTs of children <13 years of age obtained between 2010 and 2015. Patient exclusions included those with a chest wall mass, muscle disease, pectus deformity, anasarca, prior open thoracotomy, inadequate imaging, or missing height documentation. We established 4 groups based upon Broselow™ color as determined by recorded height. Investigators, trained by a pediatric board-certified radiologist, obtained standardized CT measurements of chest wall thickness at 4 points: right/left second intercostal space at the midclavicular line (ICS-MCL) and right/left fourth intercostal space in the anterior axillary line (ICS-AAL). Our outcome was the median chest wall thickness and 95% confidence intervals for each Broselow grouping and anatomic site. Results: A total of 273 chest CTs were reviewed, of which 23 were excluded, for a resultant study population of 250 scans and 498 total measurements. Median patient age was 4 years, 52.8% were male. Children measuring Broselow Gray/Pink (<68 cm), had a median chest wall thickness at the 2nd ICS-MCL of 1.57 cm (95% CI 1.42 cm, 1.72 cm), 4th ICS-AAL 1.67 cm (95% CI 1.48 cm, 1.86 cm). Broselow Red/Purple (68.1-90 cm): 2nd ICS-MCL of 1.96 cm (95% CI 1.84 cm, 2.08 cm), 4th ICS-AAL 1.73 cm (95% CI 1.62 cm, 1.84 cm). Broselow Yellow/White (90.1-115cm): 2nd ICS-MCL of 2.12 cm (95% CI 2.03 cm, 1.22 cm), 4th ICS-AAL 1.91 cm (95% CI 1.8 cm, 2.01 cm). Broselow Blue/Orange/Green (>115.1 cm): 2nd ICS-MCL of 2.45 cm (95% CI 2.3 cm, 2.6 cm), 4th ICS-AAL 2.19cm (95% CI 2.02 cm, 2.36 cm). Conclusion: Median chest wall thickness varies little by height or location in children <13 years of age. The standard 5-cm needle is twice the chest wall thickness of most children. Commercially available 14 g or 16 g standard-length 3.8 cm (1½ inch) needles are of adequate length to access the pleural cavity, regardless of height as measured by Broselow LBT.

Failure Rate of Prehospital Needle Decompression for Tension Pneumothorax in Trauma Patients

Tension pneumothorax is commonly treated with needle decompression (ND) at the 2nd intercostal space midclavicular line (2nd ICS MCL) but is thought to have a high failure rate. Few studies have attempted to directly measure the failure rate in patients receiving the intervention. We performed a retrospective analysis of 10 years of patients receiving prehospital ND. CT scans were reviewed to record the location of catheters left indwelling and the proportion of patients who did not have any pneumothorax. Chest wall thickness was measured on both injured and uninjured sides at the 2nd ICS MCL and compared with the recommended alternative, the 5th ICS anterior axillary line (5th ICS AAL). We identified 335 patients that underwent prehospital ND who had CT scans performed. Using our two different radiologic methods of assessing failure, 39 per cent and 76 per cent of attempts at ND failed to reach the pleural space. In addition, at least 39 per cent of patients did not have a tension pneumothorax. Injured chest walls were significantly thicker than uninjured chest walls at both the 2nd ICS MCL and the 5th ICS AAL (both P < 0.005.) Increasing chest wall thickness correlated with the failure of the catheter to reach the pleural space. Using an 8-cm catheter at the 5th ICS AAL, iatrogenic cardiac injury was at risk in 42 per cent of patients. This series confirms the high failure rate of ND at the 2nd ICS MCL, but further studies are needed to assure the safety of using larger catheters at the 5th ICS AAL.

Post-mortem computed tomography improves completeness of the trauma registry: a single institution experience

PURPOSE

To describe our institutional experience with post-mortem computed tomography (PMCT) and its impact on decedent injury severity score (ISS) and to assess the adequacy of emergently placed support medical devices.

METHODS

Over a 5-year period, patients who died at or soon after arrival and have physical exam findings inconsistent with death were candidates for inclusion. Whole body CT was performed without contrast with support medical devices left in place. ISS was calculated with and without the PMCT findings. PMCT results were compared to autopsy findings, if performed. The location of support medical devices was documented.

RESULTS

A total of 38 decedents underwent PMCT, including 53.1% males and a mean age of 42.0 years. Pre-PMCT ISS based on physical exam findings alone was 5.2 (range 0-25), including 16 with ISS = 0. Post-PMCT ISS using the additional imaging data was 50.3 (range 21-75), including 15 with ISS = 50 or greater. Nearly half (47.4%) had at least one support medical device that was either malpositioned or suboptimally positioned, including 26.3% with malpositioned airway devices, 10.3% with malpositioned intra-osseous catheters, and 100% with malpositioned decompressive needle thoracotomies.

CONCLUSIONS

PMCT adds value in identifying injuries that otherwise may have gone undetected in lieu of a formal autopsy, thus creating a more complete trauma registry. The identification of malpositioned support lines and tubes allows for educational feedback to the first responders and trainees. Institutions with a low formal autopsy rate for trauma victims may benefit from developing a PMCT program.

Evaluation of Monaldi's approach with regard to needle decompression of the tension pneumothorax-A cadaver study

BACKGROUND

Although needle decompression of tension pneumothorax through the second intercostal space in the midclavicular line (Monaldi's approach) is a life-saving procedure, severe complications have been reported after its implementation. We evaluated the procedure by comparing how it was performed on cadavers by study participants with different training levels.

METHODS

Six participants including one thoracic surgeon performed bilateral thoracic drainage after Monaldi on 82 torsos. After the thoraces were opened, the distances from the internal thoracic artery (A), the site of the puncture (B) and the midclavicular line (C) were measured bilaterally with reference to the median of the sternum. Further, it was determined whether the participants had correctly identified the second intercostal space. The differences between B-A and C-B were analysed.

RESULTS

The needle was placed in the second intercostal space in 136 hemithoraces (83%). The thoracic surgeon showed a hit rate of 0% laceration of adjacent vessels. All the other participants had hit rates between 10% and 15%. The interval B-A ranged from 2.88 to 5.06cm in right and from 3.00 to 5.00cm in left hemithoraces. The distance C-B lay between 1.03cm and 1.87cm (right side), and 0.84cm and 2.02cm (left side).

CONCLUSION

In our collective, the main problem was failure to assess correctly the lateral extension of the clavicle. If this fact is emphasized during training, Monaldi's approach is a safe method for needle decompression of pneumothorax.

Emergency Management of Tension Pneumothorax for Health Professionals on Remote Cat Island Bahamas

Patients living in remote areas have higher rates of injury-related death than those living in cities. Rural and remote health professionals working in sparsely populated places, such as Cat Island Bahamas, may have scant resources for treating emergency conditions. Local health professionals must be prepared to rely solely upon clinical judgment to perform emergency “high-stakes low-frequency” procedures while also accurately and effectively communicating with distantly located receiving specialists. However, these health providers may not recently have performed or had the opportunity to practice such emergency procedures. Telesimulation may be a useful way to teach remote practitioners both emergency procedures and communication skills. This technical report describes a simulation exercise for teaching these skills.

[Chest decompression in emergency medicine and intensive care]

Decompression of the chest is a life-saving invasive procedure for tension pneumothorax, trauma-associated cardiopulmonary resuscitation or massive haematopneumothorax that every emergency physician or intensivist must master. Particularly in the preclinical setting, indication must be restricted to urgent cases, but in these cases chest decompression must be executed without delay, even in subpar circumstances. The methods available are needle decompression or thoracentesis via mini-thoracotomy with or without insertion of a chest tube in the midclavicular line of the 2nd/3rd intercostal space (Monaldi-position) or in the anterior to mid-axillary line of the 4th/5th intercostal space (Bülau-position). Needle decompression is quick and does not require much material, but should be regarded as a temporary measure. Due to insufficient length of the usual 14-gauge intravenous catheters, the pleural cavity cannot be reached in a considerable percentage of patients. In the case of mini-thoracotomy, one must be cautious not to penetrate the chest inferior of the mammillary level, to employ blunt dissection techniques, to clearly identify the pleural space with a finger and not to use a trocar. In extremely urgent cases opening the pleural membrane by thoracostomy without inserting a chest tube is sufficient in mechanically ventilated patients. Complications are common and mainly include ectopic positions, which can jeopardise effectiveness of the procedure, sometimes fatal injuries to adjacent intrathoracic or - in case of too inferior placement - intraabdominal organs as well as haemorrhage or infections. By respecting the basic rules for safe chest decompression many of these complications should be avoidable.

Failure rate of prehospital chest decompression after severe thoracic trauma

INTRODUCTION

Chest decompression can be performed by different techniques, like needle thoracocentesis (NT), lateral thoracostomy (LT), or tube thoracostomy (TT). The aim of this study was to report the incidence of prehospital chest decompression and to analyse the effectiveness of these techniques.

MATERIAL AND METHODS

In this retrospective case series study, all medical records of adult trauma patients undergoing prehospital chest decompression and admitted to the resuscitation area of a level-1 trauma center between 2009 and 2015 were reviewed and analysed. Only descriptive statistics were applied.

RESULTS

In a 6-year period 24 of 2261 (1.1%) trauma patients had prehospital chest decompression. Seventeen patients had NT, six patients TT, one patient NT as well as TT, and no patients had LT. Prehospital successful release of a tension pneumothorax was reported by the paramedics in 83% (5/6) with TT, whereas NT was effective in 18% only (3/17). In five CT scans all thoracocentesis needles were either removed or extrapleural, one patient had a tension pneumothorax, and two patients had no pneumothorax. No NT or TT related complications were reported during hospitalization.

CONCLUSION

Prehospital NT or TT is infrequently attempted in trauma patients. Especially NT is associated with a high failure rate of more than 80%, potentially due to an inadequate ratio between chest wall thickness and catheter length as previously published as well as a possible different pathophysiological cause of respiratory distress. Therefore, TT may be considered already in the prehospital setting to retain sufficient pleural decompression upon admission.