Lung penetration by thoracostomy tubes: imaging findings on CT

Recommended recumbency to avoid insertional complications during small-bore wire-guided thoracostomy tube placement in cats-a cadaver study

BACKGROUND

Small-bore wire-guided thoracostomy tubes (SBWGTT) are commonly used in cats to manage pleural disease and generally have a low complication rate. Our study aimed to explore the correlation between recumbency of cats, placement method, and the occurrence of insertional complications to identify risk factors during SBWGTT placement. In this experimental cadaveric study, SBWGTT placement using a modified Seldinger technique was conducted in 24 feline cadavers. Cats, euthanized for reasons unrelated to the study, were randomly assigned to pleural effusion (EFF; n = 12) and pneumothorax (PNEU; n = 12) groups. Each cadaver was intubated and ventilated with a peak inspiratory pressure (PIP) of 10 mmHg, and sterile saline or air was instilled into the thorax over a 5 mm thoracoscopic trocar in the fourth intercostal space (ICS). Instillation was stopped when the lateral thoracic wall to lung distance (TWLD) reached 10 to 12 mm, measured with ultrasound in the favorable position. Sternal recumbency was the favorable position for the EFF group, and lateral recumbency for the PNEU group. Following the placement of the first SBWGTT in each group, the cadavers were positioned unfavorably (lateral recumbency for EFF group, sternal recumbency for PNEU group), and a second drain was introduced contralaterally. A bilateral 8th ICS thoracotomy was then performed to visually assess intrathoracic structures and drain integrity. A binary logistic regression mixed model was conducted to determine interaction between the induced condition and body position.

RESULTS

A total of 48 SBWGTTs were placed, with complications observed in 33.3% (8/24) of cases. Five of these were major complications consisting of lung lacerations. Complications were more common in the unfavorable position, accounting for 75% of cases, although this result was not statistically significant. The odds of complication rates were > 70% in the unfavorable position and decreased with an increase in TWLD (< 30%).

CONCLUSION

Complications associated with SBWGTT placement are influenced by recumbency, although the data did not reach statistical significance. Placing cats in lateral recumbency for pneumothorax treatment and sternal recumbency for pleural effusion treatment may reduce insertional complications.

[Chest Tube in Thoracic Trauma - Recommendations of the Interdisciplinary Thoracic Trauma Task Group of the German Society for Thoracic Surgery (DGT) and the German Trauma Society (DGU)]

For unstable patients with chest trauma, the chest tube is the method of choice for the treatment of a relevant pneumothorax or haemothorax. In the case of a tension pneumothorax, needle decompression with a cannula of at least 5 cm length should be performed, directly followed by the insertion of a chest tube. The evaluation of the patient should be performed primarily with a clinical examination, a chest X-ray and sonography, but the gold standard of diagnostic testing is computed tomography (CT).A small-bore chest tube (e.g. 14 French) should be used in stable patients, while unstable patients should receive a large-bore drain (24 French or larger). Insertion of chest drains has a high complication rate of between 5% and 25%, and incorrect positioning of the tube is the most common complication. However, incorrect positioning can usually only be reliably detected or ruled out with a CT scan, and chest X-rays proofed to be insufficient to answer this question. Therapy should be carried out with mild suction of approximately 20 cmH₂O, and clamping the chest tube before removal showed no beneficial effect. The removal of drains can be safely performed, either at the end of inspiration or at the end of expiration. In order to reduce the high complication rate, in the future the focus should be more on the education and training of medical staff members.

Retrospective Evaluation of the Use and Complications of Small-Bore Wire-Guided Thoracostomy Tubes in Dogs and Cats: 156 Cases (2007–2019)

Background

Small-bore wire-guided thoracostomy tubes (SBWGTT) are commonly used in small animals for management of pleural space disease. We aimed to evaluate the indications, placement locations, types of complications, and complication rate of small-bore wire-guided thoracostomy tube placements in dogs and cats in a university setting.

Methods

Electronic medical records of patients that underwent SBWGTT placement were reviewed. Signalment, disease, outcome, indication for thoracostomy tube, placement location, number of attempts, diagnostic imaging, number, and type (insertional, technical, and infectious) of complications were recorded. Logistic regression analysis was performed to determine risk factors for complications.

Results

A hundred fifty-six cases were identified between 2007 and 2019. Traumatic pneumothorax (33%), pyothorax (25%), and spontaneous pneumothorax (16%) were the most common indications for placement of a SBWGTT. Complications developed in 50 cases (32%). Technical and insertional complications accounted for 21.7% and 14.1% of all cases. Infectious complications were rare with 3.1% of all cases. Pneumothorax (19%), soft tissue swelling at insertion site (14%), and kinking of the chest tube (13%) were most common. Accidental lung perforation was reported in 5/50 complications (7%). Multiple chest tube placement attempts were associated with complications (OR = 6.01 CI: 2.13 to 16.93 p = 0.0007).

Conclusions

Complications of SBWGTT placement occurred in one third of cases. Serious complications such as accidental lung perforation was reported in two cases. Complications were associated with number of attempts.

Ultrasound-guided thoracostomy site identification in healthy volunteers

BACKGROUND

Traditional landmark thoracostomy technique has a known complication rate up to 30%. The goal of this study is to determine whether novice providers could more accurately identify the appropriate intercostal site for thoracostomy by ultrasound guidance.

METHODS

33 emergency medicine residents and medical students volunteered to participate in this study during routine thoracostomy tube education. A healthy volunteer was used as the standardized patient for this study. An experienced physician sonographer used ultrasound to locate a site at mid-axillary line between ribs 4 and 5 and marked the site with invisible ink that can only be revealed with a commercially available UV LED light. Participants were asked to identify the thoracostomy site by placing an opaque marker where they would make their incision. The distance from the correct insertion site was measured in rib spaces. The participants were then given a brief hands-on training session using ultrasound to identify the diaphragm and count rib spaces. The participants were then asked to use ultrasound to identify the proper thoracostomy site and mark it with an opaque marker. The distance from the proper insertion site was measured and recorded in rib spaces.

RESULTS

The participants correctly identified the pre-determined intercostal space using palpation 48% (16/33) of the time, versus the ultrasound group who identified the proper intercostal space 91% (30/33) of the time. On average, the traditional technique was placed 0.88 rib spaces away (95 CI 0.43-1.03), while the ultrasound-guided technique was placed 0.09 rib spaces away (95 CI 0.0-0.19) [P = 0.003].

CONCLUSIONS

The ability to accurately locate the correct intercostal space for thoracostomy incision was improved under ultrasound guidance. Further studies are warranted to determine if this ultrasound-guided technique will decrease complications with chest tube insertion and improve patient outcomes.

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

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.

Tube Thoracostomy: A Structured Review of Case Reports and a Standardized Format for Reporting Complications

INTRODUCTION

Although seemingly straightforward, tube thoracostomy (TT) has been associated with complication rates as high as 30 %. A lack of a standardized nomenclature for reporting TT complications makes comparison and evaluation of reports impossible. We aim to develop a classification method in order to standardize the reporting of complications of TT and identify all reported complications of TT and time course in which they occurred to validate the reporting method.

METHODS

A systematic search of MEDLINE, Scopus, EMBASE, and Cochrane Central Register of Controlled Trials and Database of Systematic Reviews from each databases inception through November 5, 2013 was conducted. Original articles written in the English language reporting TT complications were searched. This review adhered to preferred reporting items for systematic reviews and meta-analyses (PRISMA) standards. Duplicate reviewers abstracted case reports for inclusion. Cases were then sorted into one of the five complication categories by two reviewers, and in case of disagreements, settled by a third reviewer.

RESULTS

Of 751 papers reporting TT complications, 124 case reports were included for analysis. From these reports, five main categories of TT complications were identified: insertional (n = 65); positional (n = 36); removal (n = 11); infective and immunologic (n = 7); and instructional, educational, or equipment related (n = 5). Placement of TT has occurred in nearly every soft tissue and vascular structure in the thoracic cavity and intra-abdominal organs.

CONCLUSION

Our classification method provides further clarity and systematic standardization for reporting TT complications.

Does chest tube location matter? An analysis of chest tube position and the need for secondary interventions

BACKGROUND

Tube thoracostomy is a common procedure used in the management of thoracic trauma. Traditional teaching suggests that chest tubes should be directed in specific locations to improve function. Common examples include anterior and superior placement for pneumothorax, inferior and posterior placement for hemothorax, and avoidance of the pulmonary fissure. The purpose of this study was to examine the effect of specific chest tube position on subsequent chest tube function.

METHODS

A retrospective review of all patients undergoing tube thoracostomy for trauma from January 1, 2010, to September 30, 2012, was performed. Only patients undergoing computed tomography scans following chest tube insertion were included so that positioning could be accurately determined. Rib space insertion level and positioning of the tube relative to the lung parenchyma were recorded. The duration of chest tube drainage and the need for secondary interventions were determined and compared for tubes in different rib spaces and locations. For purposes of comparison, tubes placed above the sixth rib space were considered "high," and those at or below it were considered "low."

RESULTS

A total of 291 patients met criteria for inclusion. Forty-eight patients (16.5%) required secondary intervention. Neither high chest tube placement nor chest tube location relative to lung parenchyma was associated with an increased need for secondary interventions. On multivariate analysis, only chest Abbreviated Injury Scale (AIS) scores, mechanism, and volume of hemothorax were found to be significant risk factors for the need for secondary interventions.

CONCLUSION

Chest tube location does not influence the need for secondary interventions as long as the tube resides in the pleural space. The severity of chest injury is the most important factor influencing outcome in patients undergoing tube thoracostomy for trauma. Tube thoracostomy technique should focus on safe insertion within the pleural space and not on achieving a specific tube location.

LEVEL OF EVIDENCE

Therapeutic study, level IV.

The spectrum of visceral injuries secondary to misplaced intercostal chest drains: experience from a high volume trauma service in South Africa

INTRODUCTION

Iatrogenic visceral injuries (IVI) secondary to the insertion of an intercostal chest drain (ICD) are well documented, but are usually confined to case reports and small series.

MATERIALS AND METHODS

We reviewed our experience with 53 consecutive patients over a insertion seven year period who sustained an IVI secondary to an ICD and describe the spectrum of injuries and clinical outcome in a high volume trauma service in South Africa.

RESULTS

A total of 53 ICDs were inserted in 53 patients, 83% (44/53) of which were on the left side, and 17% (9/53) on the right side. 92% (49/53) of the patients were males and the mean age for all patients was 24 (±8) years. 85% of the patients were referred from rural hospitals, the remaining 15% were treated initially at our institution. A trocar was used in 75% (40/53) of patients and in 9% (5/53), a trocar was not used, 58 organ injuries occurred in 53 patients. 92% (49/53) of patients sustained a single organ injury and 4 sustained multiple injuries. The three most common injuries were: diaphragm (36%, 21/53), gastric (22%, 13/53), and pulmonary (12%, 7/53). Other injuries were: 6 (10%) spleen, 4 (7%) liver, 2 (3%) colon and 1 (2%) kidney. Three (5%) sustained an injury to the intercostal artery and one (2%) sustained a pulmonary artery injury. 39 patients (74%) required operative interventions which included laparoscopy: 20 (51%), laparotomy: 8 (21%), thoracotomy: 8 (21%), VAT: 3 (8%). A total of 28 patients (53%) developed further complications: 13 wound sepsis, 7 pneumonia, 6 empyema, 2 ARDS. and 15% (8/53) required intensive care admission. The mean length of hospital stay was 7 (±4) days.

CONCLUSIONS

IVI is associated with significant morbidity, with diaphragmatic, gastric and pulmonary injuries being the most common. The majority were inserted in the rural hospitals and were associated with use of a trochar, Level of evidence: III, Study type: Retrospective study.

A technique for visual confirmation of intrathoracic placement of tube thoracostomy using a fiberoptic laryngoscope in a cadaver

PURPOSE

Safe intrathoracic placement of chest tubes is a continual challenge. Current techniques for determining the intrathoracic location of the thoracostomy site include blunt dissection and digital exploration, with subsequent tube placement. Using current techniques, complication rates for this procedure approach 30%. We present a novel technique using available endotracheal intubation technology for determining intrathoracic placement of tube thoracostomy.

METHODS

One cadaver was used for placement of tube thoracostomy. Both sides of the thorax were prepared in the standard fashion for tube thoracostomy placement, and tube thoracostomy was performed on each hemithorax at interspaces 3 through 7. The right side of the thorax was used for standard thoracostomy placement, and the left side was used for fiberoptic visualization of thoracostomy placement using a video laryngoscope. Thoracic wall thickness was measured at all thoracostomy sites. Proper placement and any injuries were documented for each site.

RESULTS

Chest wall thickness ranged from 2.4 to 3.8 cm on the right and 2.8 to 4.0 cm on the left. With use of fiberoptic thoracostomy, no injuries were generated. During the standard thoracostomy placement in the sixth intercostal space, a pulmonary laceration was caused using blunt dissection.

CONCLUSIONS

Use of a fiberoptic laryngoscope offers a novel technique for direct visualization the thoracic space during tube thoracostomy. Further studies are needed to determine the safety of this technique in patients.

Expectant management of pneumothorax in ventilated neonates

OBJECTIVE

The purpose of this study was to assess the incidence and outcome of managing a pneumothorax without tube thoracostomy and to determine the clinical and laboratory characteristics that distinguish infants with a pneumothorax who can be treated without chest-tube insertion.

METHODS

A retrospective study was performed of neonates who were admitted to the neonatal intensive care unit at the University at Alabama at Birmingham from 1992 to 2005 and had a pneumothorax while on mechanical ventilation. Infant characteristics, respiratory and radiologic diagnoses, and respiratory management data (ventilator settings and blood gases) were compared between infants who initially were treated with a chest tube versus those initially treated without a chest tube.

RESULTS

A total of 136 ventilated infants with pneumothorax while on a ventilator were included in the final analysis; 101 (74%) were treated initially with a chest tube and 35 (26%) without a chest tube. Of those who did not receive a chest tube initially, 14 were treated with needle aspiration and 21 with expectant treatment. Infants who were treated initially without a chest tube were on a lower ventilator settings (mean airway pressure and fraction of inspired oxygen) and had better blood gases (arterial oxygen saturation, Pco(2), and pH) compared with infants who were treated with a chest tube. Infants who were treated initially with needle aspiration were more likely to require subsequent chest-tube insertion than infants who had expectant treatment (43% vs 10%).

CONCLUSIONS

It is possible to treat expectantly without initial chest-tube placement a select group of ventilated neonates with pneumothorax.