Respiration / Breathing Management

#### CHEST TRAUMA (GENERAL)

J Emerg Med. 2018 Sep;55(3):366-371. doi: 10.1016/j.jemermed.2018.05.027

# Emergency medical services simple thoracostomy for traumatic cardiac arrest: postimplementation experience in a ground-based suburban/rural emergency medical services agency.

Dickson R, Gleisberg G, Aiken M, Crocker K, Patrick C, Nichols T, Mason C, Fioretti J

BACKGROUND: Tube thoracostomy has long been the standard of care for treatment of tension pneumothorax in the hospital setting yet is uncommon in prehospital care apart from helicopter emergency medical services.

OBJECTIVE: We aimed to evaluate the performance of simple thoracostomy (ST) for patients with traumatic cardiac arrest and suspected tension pneumothorax.

METHODS: We conducted a retrospective case series of consecutive patients with traumatic cardiac arrest where simple thoracostomy was used during the resuscitation effort. Data were abstracted from our Zoll emergency medical record (Zoll Medical Corp., Chelmsford, MA) for patients who received the procedure between June 1, 2013 and July 1, 2017. We collected general descriptive characteristics, procedural success, presence of air or blood, and outcomes for each patient.

RESULTS: During the study period we performed ST on 57 patients. The mean age was 41 years old (range 15-81 years old) and 83% were male. Indications included 40 of 57 (70%) blunt trauma and 17 of 57 (30%) penetrating trauma. The presenting rhythm was pulseless electrical activity 65%, asystole 26%, ventricular tachycardia/fibrillation 4%, and nonrecorded 5%. Eighteen of 57 (32%) had air return, 14 of 57 (25%) return of spontaneous circulation, with 6 of 57 (11%) surviving to 24 h and 4 of 57 (7%) discharged from the hospital neurologically intact. Of the survivors, all were blunt trauma mechanism with initial rhythms of pulseless electrical activity. There were no reported medic injuries.

CONCLUSIONS: Our data show that properly trained paramedics in ground-based emergency medical services were able to safely and effectively perform ST in patients with traumatic cardiac arrest. We found a significant (32%) presence of pneumothorax in our sample, which supports previously reported high rates in this patient population.

Case Rep Emerg Med. 2018 Mar 19;2018:6351521. doi: 10.1155/2018/6351521. eCollection 2018.

# Bradycardia after tube thoracostomy for spontaneous pneumothorax.

Fashola Y, Kaul S, Finefrock D

We present the case of an elderly patient who became bradycardic after chest tube insertion for spontaneous pneumothorax. Arrhythmia is a rare complication of tube thoracostomy. Unlike other reported cases of chest tube induced arrhythmias, the bradycardia in our patient responded to resuscitative measures without removal or repositioning of the tube. Our patient, who had COPD, presented with shortness of breath due to spontaneous pneumothorax. Moments after tube insertion, patient developed severe bradycardia that responded to Atropine. In patients requiring chest tube insertion, it is important to be prepared to provide cardiopulmonary resuscitative therapy in case the patient develops a life-threatening arrhythmia.

Turk J Emerg Med. 2018 Mar 9;18(1):15-19

# Use of the iTClamp versus standard suturing techniques for securing chest tubes a randomized controlled cadaver study.

Mckee J, Mckee I Bouclin M, Ball C, McBeth P, Roberts D, Atkinson I, Filips D, Kirkpatrick A

Objectives: Tube thoracostomy (TT) is a common yet potentially life-saving trauma procedure. After successful placement however, securing a TT through suturing is a skillset that requires practice, risking that the TT may become dislodged during prehospital transport. The purpose of this study was to examine if the iTClamp was a simpler technique with equivalent effectiveness for securing TTs.

Materials and methods: In a cadaver model, a 1.5 inch incision was utilized along the upper border of the rib below the 5th intercostal space at the anterior axillary line. TTs (sizes 28Fr, 32Fr, 36Fr and 40Fr) were inserted and secured with both suturing and iTClamp techniques according to the preset randomization. TT were then functionally tested for positive and negative pressure as well as the force required to remove the TT (pull test-up to 5 lbs). Time to secure the TT was also recorded.

Results: When sutured is placed by a trained surgeon, the sutures and iTClamp were functionally equivalent for holding a positive and negative pressure. Mean pull force for both sutures and iTClamp exceeded the 5 lb threshold; there was no significant difference between the groups. Securing the TT with the iTClamp was significantly faster (p < 0.0001) with the iTClamp having a mean application time of 37.0 ± 22.8 s and using a suture had a man application time of 96.3 ± 29.0 s.

Conclusion: The iTClamp was effective in securing TTs. The main benefit to the iTClamp is that minimal skill is required to adequately secure a TT to ensure that it does not become dislodged during transport to a trauma center.

Int J Surg. 2018 Aug;56:315-319

# Steering the wheel towards the standard of care: proposal of a step-by-step ultrasound-guided emergency chest tube drainage and literature review.

Menegozzo C, Utiyama E

BACKGROUND: Chest tube drainage is a common procedure performed by physicians in the emergency setting. Complications may arise in up to 25% of the cases. These vary from drain misplacement to lethal iatrogenic injuries. Ultrasound provides adequate visualization and correct identification of the insertion site, allows the exclusion of a vulnerable intercostal artery, and enables timely diagnosis of drain malpositioning. Although feasible, ultrasound-guided techniques are underused and seldom applied during chest drainage. One reason for that is the lack of a comprehensive step-by-step description incorporating these techniques. This article aims to describe a standardized ultrasound-guided chest tube drainage technique, and also review the evidence supporting its potential benefits.

MATERIALS AND METHODS: we conducted a thorough literature search on ultrasound techniques regarding the identification of the diaphragm, the neurovascular intercostal bundle, and the position of the chest drain. Also, we analyzed published articles about complications of chest drainage.

RESULTS: we propose a feasible step-by-step ultrasound-guided technique of chest drainage and discuss why this technique should be incorporated in the routine practice.

CONCLUSION: ultrasound guidance should be incorporated in chest drainage in a stepwise fashion. Although intuitively safer, future randomized studies are warranted to support this technique.

#### NEEDLE DECOMPRESSION / TENSION PNEUMOTHORAX

J Spec Oper Med. Summer 2018;18(2):19-35.

# Management of suspected tension pneumothorax in tactical combat casualty care: TCCC Guidelines change 17-02.

Butler FK Jr, Holcomb JB, Shackelford S, Montgomery HR, Anderson S, Cain JS, Champion HR, Cunningham CW, Dorlac WC, Drew B, Edwards K, Gandy JV, Glassberg E, Gurney J, Harcke T, Jenkins DA, Johannigman J, Kheirabadi BS, Kotwal RS, Littlejohn LF, Martin M, Mazuchowski EL, Otten EJ, Polk T, Rhee P, Seery JM, Stockinger Z, Torrisi J, Yitzak A, Zafren K, Zietlow SP.

This change to the Tactical Combat Casualty Care (TCCC) Guidelines that updates the recommendations for management of suspected tension pneumothorax for combat casualties in the prehospital setting does the following things: (1) Continues the aggressive approach to suspecting and treating tension pneumothorax based on mechanism of injury and respiratory distress that TCCC has advocated for in the past, as opposed to waiting until shock develops as a result of the tension pneumothorax before treating. The new wording does, however, emphasize that shock and cardiac arrest may ensue if the tension pneumothorax is not treated promptly. (2) Adds additional emphasis to the importance of the current TCCC recommendation to perform needle decompression (NDC) on both sides of the chest on a combat casualty with torso trauma who suffers a traumatic cardiac arrest before reaching a medical treatment facility. (3) Adds a 10-gauge, 3.25-in needle/ catheter unit as an alternative to the previously recommended 14-gauge, 3.25-in needle/catheter unit as recommended devices for needle decompression. (4) Designates the location at which NDC should be performed as either the lateral site (fifth intercostal space [ICS] at the anterior axillary line [AAL]) or the anterior site (second ICS at the midclavicular line [MCL]). For the reasons enumerated in the body of the change report, participants on the 14 December 2017 TCCC Working Group teleconference favored including both potential sites for NDC without specifying a preferred site. (5) Adds two key elements to the description of the NDC procedure: insert the needle/ catheter unit at a perpendicular angle to the chest wall all the way to the hub, then hold the needle/catheter unit in place for 5 to 10 seconds before removing the needle in order to allow for full decompression of the pleural space to occur. (6) Defines what constitutes a successful NDC, using specific metrics such as: an observed hiss of air escaping from the chest during the NDC procedure; a decrease in respiratory distress; an increase in hemoglobin oxygen saturation; and/or an improvement in signs of shock that may be present. (7) Recommends that only two needle decompressions be attempted before continuing on to the "Circulation" portion of the TCCC Guidelines. After two NDCs have been performed, the combat medical provider should proceed to the fourth element in the "MARCH" algorithm and evaluate/treat the casualty for shock as outlined in the Circulation section of the TCCC Guidelines. Eastridge's landmark 2012 report documented that noncompressible hemorrhage caused many more combat fatalities than tension pneumothorax.1 Since the manifestations of hemorrhagic shock and shock from tension pneumothorax may be similar, the TCCC Guidelines now recommend proceeding to treatment for hemorrhagic shock (when present) after two NDCs have been performed. (8) Adds a paragraph to the end of the Circulation section of the TCCC Guidelines that calls for consideration of untreated tension pneumothorax as a potential cause for shock that has not responded to fluid resuscitation. This is an important aspect of treating shock in combat casualties that was not presently addressed in the TCCC Guidelines. (9) Adds finger thoracostomy (simple thoracostomy) and chest tubes as additional treatment options to treat suspected tension pneumothorax when further treatment is deemed necessary after two unsuccessful NDC attempts-if the combat medical provider has the skills, experience, and authorizations to perform these advanced interventions and the casualty is in shock. These two more invasive procedures are recommended only when the casualty is in refractory shock, not as the initial treatment.

#### CHEST SEALS / SUCKING CHEST WOUND

Eur J Trauma Emerg Surg. 2018 May 31. doi: 10.1007/s00068-018-0966-z. [Epub ahead of print]

# Clinical consequences of chest tube malposition in trauma resuscitation: single-center experience.

Struck M, Ewens S, Fakler J, Hempel G, Beilicke A, Bernhard M, Stumpp P, Josten C, Stehr S, Wrigge H, Krämer S

PURPOSE: Evaluation of trauma patients with chest tube malposition using initial emergency computed tomography (CT) and assessment of outcomes and the need for chest tube replacement.

METHODS: Patients with an injury severity score > 15, admitted directly from the scene, and requiring chest tube insertion prior to initial emergency CT were retrospectively reviewed. Injury severity, outcomes, and the positions of chest tubes were analyzed with respect to the need for replacement after CT.

RESULTS: One hundred seven chest tubes of 78 patients met the inclusion criteria. Chest tubes were in the pleural space in 58% of cases. Malposition included intrafissural positions (27%), intraparenchymal positions (11%) and extrapleural positions (4%). Injury severity and outcomes were comparable in patients with and without malposition. Replacement due to malfunction was required at similar rates when comparing intrapleural positions with both intrafissural or intraparenchymal positions (11 vs. 23%, p = 0.072). Chest tubes not reaching the target position (e.g., pneumothorax) required replacement more often than targeted tubes (75 vs. 45%, p = 0.027). Out-of-hospital insertions required higher replacement rates than resuscitation room insertions (29 vs. 10%, p = 0.016). Body mass index, chest wall thickness, injury severity, insertion side and intercostal space did not predict the need for replacement.

CONCLUSIONS: Patients with malposition of emergency chest tubes according to CT were not associated with worse outcomes compared to patients with correctly positioned tubes. Early emergency chest CT in the initial evaluation of severely injured patients allows precise detection of possible malposition of chest tubes that may require immediate intervention.