Follow-up chest radiographs after traumatic pneumothorax or hemothorax in the outpatient setting: a retrospective review.

PURPOSE: To evaluate the need for obtaining postdischarge chest radiographs for trauma patients who were treated with a thoracostomy tube. METHODS: A retrospective medical record review was conducted for all patients treated with a thoracostomy tube while admitted to the trauma service at Saint Louis University Hospital over a 12-month period. Patients who died during their hospital stay were excluded. RESULTS: During the 12-month study period, 155 trauma patients who were treated with a thoracostomy tube were discharged from the hospital. The indications for the thoracostomy tube were pneumothorax (n = 79, 51% of study population), hemopneumothorax (n = 34, 22%), hemothorax (n = 28, 18%), diaphragmatic rupture/laceration (n = 8, 5%), post thoracotomy (n = 4, 3%), and iatrogenic pneumothorax (n = 2, 1%). A follow-up clinic visit was scheduled for 1 to 2 weeks after discharge. Forty patients (26%) were lost to follow-up. Two patients called to report they had no symptoms and canceled their appointments. A total of 113 patients returned for follow-up appointments. Fifty-two patients had a predischarge chest radiograph that was negative for pneumothorax or hemothorax, had no symptoms, had normal results of a physical examination at the time of their clinic visit, and did not have a postdischarge chest radiograph. A total of 61 (54%) had postdischarge chest radiographs. Of that number, 56 (92%) were negative for pneumothorax. Three patients (5%) had a small pneumothorax, and 2 patients (3%) were noted to have a resolving hemothorax. All 5 patients were without symptoms and were released from the trauma service. CONCLUSION: A postdischarge chest radiograph is not indicated for an asymptomatic trauma patient who was treated with a tube thoracostomy and had a predischarge chest radiograph that was negative for pneumothorax or hemothorax.     

Cocaine-induced agitated delirium with associated hyperthermia: a case report

Background: “Cocaine-induced agitated delirium with associated hyperthermia” is a rare, almost uniformly fatal syndrome. The incidence of the disease is not known, however, it is believed to have markedly increased since the late 1980s with widespread popularity of crack cocaine. Objective: Recent literature is lacking regarding this rare syndrome. Although almost uniformly fatal, we present a neurologically intact survivor due to a multidisciplinary team approach. Case Report: We are reporting a 41-year-old African-American man who arrived at the trauma center with a rectal temperature of 42.6°C (108.6°F) and a toxicology screen positive for cocaine. The patient manifested many of the known complications of cocaine-induced agitated delirium with associated hyperthermia, including renal failure and coagulation panel abnormalities. With early application of cooling techniques, including ice pack, gastric lavage, and bilateral chest cavity lavage using multiple chest tubes, the patient's core temperature was quickly lowered. Conclusion: This case demonstrated how a multidisciplinary team approach, including emergency medicine and critical care specialists, and aggressive treatment of hyperthermia using bilateral tube thoracostomy and chest cavity lavage enabled our patient's core temperature to be effectively lowered. We were unable to find prior reports of using tube thoracostomy in this manner.     

Confirmation of Endotracheal Tube Placement after Intubation Using the Ultrasound Sliding Lung Sign

Objectives: To evaluate the performance of the ultrasound (US) sliding lung sign as a predictor of endotracheal tube (ETT) placement. Many other tools and examination findings have been used to confirm ETT placement; erroneous placement of the ETT has even been confirmed by US. Methods: This was a laboratory study using fresh, recently dead cadavers. Cadavers were obtained at a medical school anatomy laboratory on the basis of availability during a four‐month period. Subjects who died from significant trauma or after thoracic surgery were excluded. A numerical randomization tool was used to direct where the tube would be placed on intubation. Laryngoscopy was performed, and the ETT was placed in the esophagus, in the trachea, or in the right main stem (RMS) bronchus. Placement was confirmed by direct laryngoscopic visualization of ETT passage through vocal cords or with fiber optic visualization, as needed. US images of the sliding lung sign, sliding of visceral and parietal pleura past each other, were taken on both sides of the chest at the mid axillary line during ventilation with an ambu bag. Two board‐certified emergency physicians with hospital credentialing in emergency US used a 4‐2 MHz micro‐convex transducer on a Sonosite 180 Plus for imaging. The sonologists were blinded to the location of the endotracheal tube and imaged and recorded their results individually. A positive sliding lung sign was taken to signify lung expansion with ventilation in a hemithorax. Endotracheal versus esophageal ETT placement, as well as tracheal versus RMS, was determined on the basis of sliding lung findings on both sides of the chest. Interpreter agreement, sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and likelihood ratios (LHR) were calculated for tracheal (including RMS) versus esophageal, as well as main trachea versus RMS intubation. Results: Nine cadavers yielded 68 intubations. For esophageal versus tracheal (including RMS) intubation, sonologist 1 (S1) had a sensitivity of 95.4% (95% CI = 84.2% to 99.4%), a specificity of 100% (95% CI = 86.3% to 100%), an NPV of 92.6% (95% CI = 75.7% to 99.1%), and a PPV of 100% (95% CI = 91.4% to 100%) with an LHR of 0.05 (95% CI = 0.01 to 0.2) for a negative test. Sonologist 2 (S2) had a sensitivity of 100% (95% CI = 91.8% to 100%), a specificity of 100% (95% CI = 86.3% to 100%), an NPV of 100% (95% CI = 86.3% to 100%), and a PPV of 100% (95% CI = 91.8% to 100%); agreement was 97% (κ= 0.94; 95% CI = 0.7 to 1.2). In RMS versus tracheal, S1 had a sensitivity of 69.2% (95% CI = 48.2% to 85.7%), a specificity of 93.3% (95% CI = 68.1% to 99.8%), a PPV of 94.7% (95% CI = 73.9% to 99.9%), and an NPV of 63.6% (95% CI = 40.7% to 82.8%) with an LHR for a positive test of 10.4 (95% CI = 2.2 to 59.1) and of 0.4 (95% CI = 0.2 to 0.6) for negative test. S2 had a sensitivity of 78.6% (95% CI = 59.1% to 91.7%), a specificity of 100% (95% CI = 78.2% to 100%), a PPV of 100% (95% CI = 84.6% to 100%), NPV of 71.4% (95% CI = 47.8% to 88.7%), with an LHR for a negative test of 0.2 (95% CI = 0.1 to 0.4); agreement was 85.9% (κ= 0.6; 95% CI = 0.4 to 0.9). Conclusions: These results show that US imaging of the sliding lung sign in a cadaver model is an accurate method for confirmation of ETT placement. Further, the technique may have some utility in differentiating RMS bronchus from main tracheal intubations.     

Radiographic detection of intrabronchial malpositions of nasogastric tubes and subsequent complications in intensive care unit patients

Objective: The aim of our study was to illustrate the radiographic spectrum of the intrabronchial malposition of nasogastric tubes and subsequent complications, and to discuss the role of radiography in the detection of such malpositions. Design: Retrospective clinical investigation. Setting: Tertiary care university teaching hospital. Patients and methods: We reviewed chest radiographs of 14 intensive care patients with nasogastric tubes malpositioned in the tracheobronchial tree. The site and anatomic location of the malposition were recorded. Complications due to tube malpositioning were monitored on follow-up radiographs and on computed tomographic examinations, which were available in 4 patients. Results: Nine of 14 nasogastric tubes were inserted in the right and 5 in the left tracheobronchial tree. Tube tips were malpositioned in the lower lobe bronchi (50 %), the intermediate bronchus (36 %), and the main bronchi (14 %). There was perforation of the bronchial system with subsequent pneumothorax in 4 patients. In 4 other patients, pneumonia developed at the former site of the malpositioned tube tip. Radiographic detection of nasogastric tube malpositioning was prompt in 9 patients and delayed in 5 patients. Conclusions: Whereas clinical signs of nasogastric tube malpositioning in intensive care patients may be absent or misleading, chest radiography can accurately detect nasogastric tube malpositions in the tracheobronchial tree, may prevent complications, and avoid the use of further costly or invasive diagnostic techniques. Received: 29 November 1995 Accepted: 6 December 1996     

Effectiveness and safety of small-bore tube thoracostomy (≤20 Fr) for chest trauma patients: A retrospective observational study

IntroductionTube thoracostomy is an important treatment for traumatic hemothorax and pneumothorax. The optimal tube diameter remains unclear. To reduce invasiveness, we use small-bore chest tubes (≤20 Fr) for all trauma patients for whom tube thoracostomy is indicated in our emergency department (ED). The aim of this study was to investigate the effectiveness and safety of small-bore tube thoracostomy for traumatic hemothorax or pneumothorax.MethodWe conducted a retrospective observational study at a single emergency medical center. This study included adult patients (≥18 years old) who had undergone tube thoracostomy for chest trauma in the ED during the 5 years from October 2013 to September 2018. We used 20 Fr chest tubes or 8 Fr pigtail catheters. The examined outcome was tube-related complications, such as tube obstruction, retained hemothorax, and unresolved pneumothorax.ResultsA total of 107 tube thoracostomies were performed in 102 patients. The mean Injury Severity Score of these patients was 17.8 (±9.6), and the mean duration of the tube placement period was 3.9 days (±1.8). Eight patients developed tube-related complications (7.8%) (retained hemothorax: 4 patients (3.9%), unresolved pneumothorax: 4 patients (3.9%)). None of these cases were caused by tube obstruction. Although the drainage itself was effective, they underwent definitive invasive interventions to stop bleeding or air leak.ConclusionOur study showed that the use of small-bore (≤20 Fr) chest tubes to treat traumatic hemothorax/pneumothorax achieved the purposes of tube thoracostomy. It might be possible to safely manage chest trauma with small-bore chest tubes.     

Chylothorax: a rare complication of tube thoracostomy

Background: Chylothorax resulting from chest tube injury to the thoracic duct is very rare and underreported. Objective: The purpose of this case report is to exemplify this rare but potentially significant complication of chest tube thoracostomy. Case Report: An 86-year-old woman presented with sepsis and a massive right pleural effusion; she developed a chylous effusion with the pleural fluid triglyceride level of 158 mg/dL 2 days after a traumatic chest tube insertion. All investigations excluded common causes of non-traumatic chylothorax. The chylothorax improved after fasting and implementation of a medium-chain triglyceride diet. Conclusion: The optimal depth of insertion of the chest tube typically ranges from 5 to 15 cm, ensuring all sideports are within the chest and the proximal port is at least 2 cm beyond the rib margin. Traumatic chylothorax secondary to chest tube insertion should be included in the differential diagnosis of patients presenting with chylothorax after a thoracostomy tube.     

Sensitivity of Bedside Ultrasound and Supine Anteroposterior Chest Radiographs for the Identification of Pneumothorax After Blunt Trauma

Objectives: Supine anteroposterior (AP) chest radiographs in patients with blunt trauma have poor sensitivity for the identification of pneumothorax. Ultrasound (US) has been proposed as an alternative screening test for pneumothorax in this population. The authors conducted an evidence‐based review of the medical literature to compare sensitivity of bedside US and AP chest radiographs in identifying pneumothorax after blunt trauma. Methods: MEDLINE and EMBASE databases were searched for trials from 1965 through June 2009 using a search strategy derived from the following PICO formulation of our clinical question: patients included adult (18 + years) emergency department (ED) patients in whom pneumothorax was suspected after blunt trauma. The intervention was thoracic ultrasonography for the detection of pneumothorax. The comparator was the supine AP chest radiograph during the initial evaluation of the patient. The outcome was the diagnostic performance of US in identifying the presence of pneumothorax in the study population. The criterion standard for the presence or absence of pneumothorax was computed tomography (CT) of the chest or a rush of air during thoracostomy tube placement (in unstable patients). Prospective, observational trials of emergency physician (EP)‐performed thoracic US were included. Trials in which the exams were performed by radiologists or surgeons, or trials that investigated patients suffering penetrating trauma or with spontaneous or iatrogenic pneumothoraces, were excluded. The methodologic quality of the studies was assessed. Qualitative methods were used to summarize the study results. Data analysis consisted of test performance (sensitivity and specificity, with 95% confidence intervals [CIs]) of thoracic US and supine AP chest radiography. Results: Four prospective observational studies were identified, with a total of 606 subjects who met the inclusion and exclusion criteria. The sensitivity and specificity of US for the detection of pneumothorax ranged from 86% to 98% and 97% to 100%, respectively. The sensitivity of supine AP chest radiographs for the detection of pneumothorax ranged from 28% to 75%. The specificity of supine AP chest radiographs was 100% in all included studies. Conclusions: This evidence‐based review suggests that bedside thoracic US is a more sensitive screening test than supine AP chest radiography for the detection of pneumothorax in adult patients with blunt chest trauma. ACADEMIC EMERGENCY MEDICINE 2010; 17:11–17 © 2010 by the Society for Academic Emergency Medicine     

Confirming nasogastric tube placement: Is the colorimeter as sensitive and specific as X-ray? A diagnostic accuracy study

BackgroundThe effect of delivering enteral nutrition or medications via a nasogastric tube that is inadvertently located in the tracheobronchial tract can cause respiratory complications. Although radiographic examination is accepted as the gold standard for confirming the position of patients’ enteral tubes, it is costly, involves risks of radiation, and is not failsafe. Studies using carbon dioxide sensors to detect inadvertent nasogastric tube placements have been conducted in intensive care settings. However, none involved patients in general wards.ObjectiveThe objective of this study was to ascertain the diagnostic measure of colorimeter, with radiographic examination as the reference standard, to confirm the location of nasogastric tubes in patients.DesignA prospective observational study of a diagnostic test.SettingThis study was conducted in the general wards of an approximately 1100-bed acute care tertiary hospital of an Academic Medical Center in Singapore.ParticipantsAdult patients with nasogastric tubes admitted to the general wards were recruited into the study.MethodsThe colorimeter was attached to the nasogastric tube to detect for the presence of carbon dioxide, suggestive of a tracheobronchial placement. The exact location of the nasogastric tube was subsequently confirmed by a radiographic examination.ResultsA total of 192 tests were undertaken. The colorimeter detected carbon dioxide in 29 tested nasogastric tubes, of which radiographic examination confirmed that four tubes were located in the tracheobronchial tract. The colorimeter failed to detect carbon dioxide in one nasogastric tube that was located in the tracheobronchial tract, thus, demonstrating a sensitivity of 0.80 [95% CI (0.376, 0.964)]. The colorimeter detected absence of carbon dioxide in 163 tested nasogastric tubes in which radiographic examination confirmed 160 gastrointestinal and one tracheobronchial placements, demonstrating a specificity of 0.865 [95% CI (0.808, 0.907)]. The colorimeter detected one tracheobronchial nasogastric tube placement that the radiographic examination was misinterpreted.ConclusionThe study found that the use of the colorimeter in the general ward setting was not 100% sensitive or specific in ascertaining the location of a nasogastric tube as previously reported by many studies undertaken in intensive care settings. This is the first study on the use of a colorimeter to confirm the placement of a nasogastric tube in adult patients in the general ward setting. More research on the use of a colorimeter in the general ward setting and its potential use in certain processes for confirming the placement of a nasogastric tube is warranted.     

Thoracic point-of-care ultrasound is an accurate diagnostic modality for clinically significant traumatic pneumothorax

Objective

There are conflicting data regarding the accuracy of thoracic point-of-care ultrasound (POCUS) in detecting traumatic pneumothorax (PTX). The purpose of our study was to determine the accuracy of thoracic POCUS performed by emergency physicians for the detection of clinically significant PTX in blunt and penetrating trauma patients.

Methods

We conducted a retrospective institutional review board–approved study of trauma patients 15 years or older presenting to our urban Level I academic trauma center from December 2021 to June 2022. All study patients were imaged with single-view chest radiography (CXR) and thoracic POCUS. The presence or absence of PTX was determined by multidetector computed tomography (CT) or CXR and ultrasound (US) with tube thoracostomy placement.

Results

A total of 846 patients were included, with 803 (95%) sustaining blunt trauma. POCUS identified 13/15 clinically significant PTXs (defined as ≥35 mm of pleural separation on a blinded overread or placement of a tube thoracostomy prior to CT) with a sensitivity of 87% (95% confidence interval [CI] 58–97), specificity of 100% (95% CI 99–100), positive predictive value of 81% (95% CI 54%–95%), and negative predictive value of 100% (95% CI 99%–100%). The positive likelihood ratio was 484 and the negative likelihood ratio was 0.1. CXR identified eight (53%) clinically significant PTXs, with a sensitivity of 53% (95% CI 27%–78%) and a specificity of 100%, when correlated with the CT. The most common reason for a missed PTX identified on expert-blinded overread was failure to recognize a lung point sign that was present on US.

Conclusions

Thoracic POCUS accurately identifies the majority of clinically significant PTXs in both blunt and penetrating trauma patients. Common themes for false-negative thoracic US in the expert-blinded overread process identified key gaps in training to inspire US education and medical education research.     

Ulnar Neuropathy After Tube Thoracostomy for Pneumothorax

Background: Chest tube placement is a frequently required surgical procedure among patients in the emergency department. Although the procedure is often simple, occasionally there are known complications, including unresolved pneumothorax or hemopneumothorax, extrathoracic placement of the tube, and damage to the intercostal neurovascular bundle. Objectives: We report an unusual yet noteworthy complication of ulnar neuropathy after chest tube placement for pneumothorax. Awareness of the association between acute ulnar neuropathy and chest tube placement will alert the physician to reposition the tube and prevent ongoing compression. Case Report: A 43-year-old man developed right-sided rib fractures (6–9 and 12) and a pneumothorax from blunt trauma to the right chest wall. Upon insertion of a 36 French chest tube, the patient reported immediate ulnar nerve distribution paresthesias of the ipsilateral arm. The tube was subsequently repositioned with improvement of symptoms. He was later discharged with occupational therapy outpatient follow-up. Conclusion: Ulnar neuropathy is a rare, though significant, complication associated with tube thoracostomy. Management of persistent symptoms is expectant, with early upper extremity range of motion and strength exercise.     

Performance of a sensitive troponin assay in the early diagnosis of acute myocardial infarction in the emergency department

Aim: Troponin assays have high diagnostic value for myocardial infarction (MI), but sensitivity has been weak early after chest pain onset. New, so‐called ‘sensitive’ troponin assays have recently been introduced. Two studies report high sensitivity for assays taken at ED presentation, but studied selected populations. Our aim was to evaluate the diagnostic performance for MI of a sensitive troponin assay measured at ED presentation in an unselected chest pain population without ECG evidence of ischaemia. Methods: This is a sub‐study of a prospective cohort study of adult patients with potentially cardiac chest pain who underwent evaluation for acute coronary syndrome. Patients with clear ECG evidence of acute ischaemia or an alternative diagnosis were excluded. Data collected included demographic, clinical, ECG, biomarker and outcome data. A ‘positive’ troponin was defined as >99th percentile of the assay used. MI diagnosis was as judged by the treating cardiologist. The outcomes of interest were sensitivity, specificity and likelihood ratios (LR) for positive troponin assay taken at ED presentation. Data were analysed by clinical performance analysis. Results: Totally 952 were studied. Median age was 61 years; 56.4% were male and median TIMI score was 2. There were 129 MI (13.6, 95% CI 11.5–15.9). Sensitivity of TnI at ED presentation was 76.7% (95% CI 68.5–83.7%), specificity 93.6% (95% CI 91.7–95.1%), with LR positive 11.92 and LR negative 0.25. Conclusion: Sensitive TnI assay at ED presentation has insufficient diagnostic accuracy for detection of MI. Serial biomarker assays in patients with negative initial TnI are required.     

Complications of Tube Thoracostomy Placement in the Emergency Department

Background: Emergency medicine residents frequently perform invasive procedures, including tube thoracostomy (TT), that inherently place patients at risk for complications. Objectives: The purpose of the study was to assess the prevalence and types of complications from TT in an academic emergency department (ED). Methods: A combined prospective and retrospective, observational study of all patients who had TT between December 2002 and January 2006 was performed. Exclusion criteria included age < 15 years and tube placement at an outside facility. Complications detected in the ED were defined as immediate, whereas those discovered later were defined as delayed. Complications requiring corrective surgical intervention, administration of blood products, or intravenous antibiotics were defined as major. Bivariate and multivariate analyses were used to identify operator and patient factors associated with complications. Results: TTs were placed in 242 patients, and 90 (37%; 95% confidence interval [CI] 31.1–43.3%) experienced a complication. Major complications included one intercostal artery laceration, one retroperitoneal placement, and empyema in 2 patients. In multivariate analysis, blunt injury excluding motor vehicle accidents (odds ratio [OR] 2.57; 95% CI 1.27–5.21) and spontaneous pneumothorax (OR 3.84; 95% CI 1.80–8.18) were associated with all complications. TT size < 36 French and blunt injury excluding motor vehicle accidents were associated with immediate complications and spontaneous pneumothorax was associated with delayed complications. Conclusions: The vast majority of complications from TT in the ED were minor. The prevalence of complications was consistent with previous reports of TTs placed by non-emergency-medicine-trained physicians outside the ED. The findings can be used to identify avoidable complications and improve residency training.     

ISO15189认可过程中两种分离胶采样管的质量评价

目的探讨建立两种不同的分离胶采样管的质量评价方法。方法以硅化玻璃采血管为标准管,以两种分离胶采样管为测试管,随机收集50例患者血清,利用电化学发光、酶联免疫吸附法、反射发光法、免疫荧光法等方法定量或者定性检测血清中各种临床免疫、临床生化指标,并进行相应的统计分析。结果对于定量项目而言,两种分离胶采样管与标准管相比,检测结果比较差异无统计学意义(P0.05);对于定性项目而言,两种分离胶采样管与标准管相比,真阳性率和真阴性率比较差异无统计学意义(P0.05,K0.75),一致性较好。结论通过使用不同的检测方法和检测项目证明了分别采用两种分离胶采样管不会影响到检测结果的准确性和一致性,初步建立了ISO15189实验室认可过程中该实验室针对外部供应品的质量评价方法。     

Candida dubliniensis screening using the germ tube test in clinical yeast isolates and prevalence of C. dubliniensis in Korea

The aim of this study was to screen for C. dubliniensis using the germ tube test with human pooled serum (HPS) in clinical isolates and investigate the prevalence of C. dubliniensis in Korea. Among 1,854 yeast strains isolated, 1,404 strains of C. albicans (on the basis of positive results of the germ tube test) and 192 germ tube‐negative yeast strains were examined. All 1,596 clinical isolates were examined using the germ tube test with HPS, the differential temperature, and NaCl tolerance test. Only 81 isolates that did not grow at 45°C nor on Sabouraud 6.5% NaCl broth were selected and tested using the VITEK 2 ID‐YSTsystem and the multiplex‐PCR assay for the study. The two strains, C. dubliniensis ATCC MYA‐646 and KCTC 17427 failed to produce germ tubes in HPS but produced them in fresh rabbit serum (FRS) and fetal bovine serum (FBS). No C. dubliniensis was found in this study population. The results of this study suggest that the germ tube test with HPS in combination with FRS or FBS can be used for discriminating between C. albicans and C. dubliniensis strains and that the prevalence of C. dubliniensis appears to be extremely low in Korea. J. Clin. Lab. Anal. 24:145–148, 2010. © 2010 Wiley‐Liss, Inc.     

创伤性血胸和气胸患者胸腔引流管径大小选择与预后的相关性

目的探讨胸腔引流管径的大小对患者预后的影响。方法回顾性分析2010年1月至2019年12月航天中心医院收治因胸部创伤而进行胸腔引流管置入的74例患者资料,评估患者特征与引流管的大小、额外置管的风险和并发症的相关性。结果74例患者置入胸管86根,77根引流管作为初始引流管(3例患者需要双侧引流),9根为额外放置的引流管(置管原因分别为残余气胸3例,残余血胸4例,残余血气胸1例,胸腔外放置不当1例),附加引流管的管径与初始引流管相比较,差异无显著性(P=0.19,95%CI:-1.62~4.95)。初始置管放置的大小与患者的性别、指征、呼吸状态(有无气管插管)、受伤机制无相关性;引流管的大小与患者的年龄、体重指数、修订后的创伤评分、损伤严重程度评分、适应证、胸部损伤简短量表评分无相关性。按引流管大小将患者分为≥14 Fr组和<14 Fr组,两组间需要额外插管、血肿/气胸残留、胸膜外放置不当的风险差异无显著性,不需要额外的导管或手术干预治疗导管阻塞或残留的血胸凝块。结论在胸部外伤患者中放置<14 Fr引流管,残余血肿/气胸和阻塞引流的风险并未增加,引流充分有效。     

Nasogastric tube placement under sonographic observation: A comparison study of ultrasound and chest radiography in mechanically ventilated patients

BackgroundNasogastric tube insertion in the intensive care setting is common. Placement verification is required to avoid complications of bronchotracheal misplacement that range from aspiration of infused contents to death from associated causes. The gold standard of practice is chest radiography. Ultrasound is a growing modality and is readily available in most intensive care units.ObjectiveThe objective of this study was to examine the diagnostic accuracy of ultrasound imaging of nasogastric tube placements by nonradiologists compared with chest radiography in mechanically ventilated patients.MethodsThis is a dual-centre prospective, single-blind study. Correct placement was captured with a hyperechoic ultrasound image of a nasogastric tube in the oesophagus and epigastrium, which was compared with chest radiography. Patient enrolment included general adult intensive care unit admissions who were mechanically ventilated and required a nasogastric tube for either the treatment or monitoring of their illness.ResultsA total of 25 patients were enrolled (15 men, 10 women), and their mean age was 68.1 ± 13.8 years. Outcome measures were the percentage of correctly identified nasogastric tubes in the oesophagus and epigastrium. The sensitivity of oesophagus ultrasound was 88%, and the positive predictive value was 100%. The subxiphoid sensitivity was 64%, and the positive predictive value was 100%. Comparison sensitivity and specificity of oesophagus versus subxiphoid ultrasound was 64% and 33%, respectively. There was a positive predictive value of 88% and a negative predictive value of 11%. The results showed a variance in detection sensitivity in the ultrasound scans of the oesophagus (0.88) and subxiphoid (0.64) (N = 25, p = 0.012).ConclusionNasogastric tube placement verification via ultrasound in critically ill mechanically ventilated patients conducted by nonradiologists with minimal training is associated with diagnostic accuracy. These results add to the limited evidence in the current literature; however, they should be considered with awareness that placement in the stomach in this study was detected in 64% of cases, alongside the missed captured evidence of the sonographer's ability to identify misplacement.     

Successful blind placement of nasojejunal tubes in paediatric intensive care: impact of training and audit

AIM: This paper is a report of a study to monitor continuing nasojejunal tube placement success rate and to evaluate a training programme for staff placing these tubes at the bedside. BACKGROUND: Gastric delivery of enteral feeds is frequently poorly tolerated due to impaired gastric motility in critically ill children. Consequently, there has been an increased interest in the use of the nasojejunal feeding route. Nasojejunal tubes are both safe and well-tolerated, but placements of these tubes are notoriously difficult and therefore often avoided. Consequently, a blind bedside technique was developed, with a placement success of 96%. METHOD: A training programme using this technique was developed for nursing staff on the unit. This included one-to-one training of key nurses of the nasojejunal tube placement technique and a supervised nasojejunal placement with either the senior nurse or dietitian. This practice was audited in 100 consecutive patients in 2001 and 2004. Patient demographics, diagnosis, time taken for placement and reasons for unsuccessful placements were documented. RESULTS: The 2001 audit (n = 100) indicated that the nasojejunal route was used in 19% of all cases, with 1% and 80% of patients fed via the parenteral and nasogastric route respectively. In 2004 (n = 94), 18% of patients were fed via the nasojejunal route, 3% parenterally and 79% via the gastric route. Placement success continued to be between 94.5-95% in 2001 and 2004. CONCLUSION: Continued successful placement of blind nasojejunal feeding tubes can be achieved through a well-monitored education programme, regular audit cycles and multidisciplinary team support.     

Activated factor XII type A predicts long‐term mortality in patients admitted with chest pain1

Summary. Background: We assessed the relation between admission levels of activated factor XII type A (XIIaA), and long‐term all‐cause and cardiac mortality and recurrent troponin T (TnT) positive cardiovascular events in a consecutive cohort of 870 patients admitted with a clinically strongly suspected acute coronary syndrome (ACS). Methods and results: After a 24‐month follow‐up period, 138 patients (15.8%) had died and 155 (17.8%) had suffered from a recurrent TnT positive (TnT > 0.05 ng mL^?1) event. XIIaA levels were significantly lower in long‐term survivors than in patients who died (22.9 (17.7–32.1) vs. 27.2 (20.0–39.7) pmol L^?1 [median, 25 and 75% percentiles], P < 0.001). The unadjusted hazard ratio for death within 2 years in patients with XIIaA in the highest quartile was 2.49 (95% confidence interval (CI), 1.52–4.06) as compared with patients with XIIaA in the lowest quartile. In a stepwise Cox regression model for death within 2 years, XIIaA added prognostic information for all‐cause mortality (HR 2.05; 95% CI, 1.21–3.47) above and beyond age, a history of heart failure, ST‐segment elevation, TnT and B‐type natriuretic peptide (BNP). In the subgroup of patients with an admission TnT ≤ 0.05 ng mL^?1, XIIaA provided independent prognostic information for all‐cause mortality (HR 3.88; 95% CI, 1.66–9.08) and for the combined endpoint of death or recurrent TnT positive event (HR 2.46; 95% CI, 1.34–4.50). Conclusion: XIIaA, a recently identified in vivo form of activated factor XII is an independent indicator of long‐term all‐cause mortality in patients admitted with chest pain, providing prognostic information above and beyond conventional risk factors.     

Emergency chest tube placement in trauma care-Which approach is preferable?

BACKGROUND: Pneumothorax is present in about 20% of blunt major trauma cases. Insertion of an intercostal tube drainage is one effective treatment, however it is unclear whether the thoracostomy has more advantages if placed in the ventral (2.-3. intercostal space) or lateral (4.-6. intercostal space) approach. The aim of this study was to determine, whether there are any differences between the two approaches in respect of malposition and complications. MATERIAL AND METHODS: The data from 851 consecutive patients, admitted to our trauma centre from January 2000 to June 2004, was collected and analysed prospectively. The inclusion criteria were: ISS > or = 16, insertion of an intercostal tube and subsequent thoracic computed tomography. Epidemiological and physiological data were analysed together with the location of the tube (ventral or lateral). The attending physician was free to choose the location of insertion. Chest tubes placed both on-scene and in-hospital chest tubes were investigated. Malpositions, defined as extrathoracic, abdominal, parenchymal or interlobal positions, were analysed by reviewing the computed tomography of the thorax (CT). Complications, like injuries to vessels or organs, infection or empyaema were analysed using our standardised prospective trauma protocol. Furthermore, the rate of clinically relevant malfunctions due to malposition was investigated as well as the number of chest tubes that had to be replaced. RESULTS: One hundred and one chest tubes were inserted in 68 patients with multiple trauma (mean age 40.7, ISS=38.1, AIS thorax=3.9). In 21 cases a ventral approach was chosen (20.8%) and in 80 a lateral approach (79.2%). CT revealed malposition in two of the ventrally placed tubes (9.5%) and in 20 of the laterally placed tubes (25%) (p=0.15, Fisher's exact test). One tube was identified in a subcutaneous location 17 chest tubes, after ventral approach all of them as a result of lateral approaches, were placed in the interlobe. No interlobal positions were observed in the ventral group. The interlobal position was found to be significantly higher in the lateral approach (p=0.013, Fisher's exact test). Clinically relevant malfunction was diagnosed in 6 of the 22 malpositioned chest tubes (5.9%). These tubes had to be repositioned, one was placed ventrally, the other five were placed laterally. CONCLUSIONS: In our setting physicians preferred the lateral approach on-scene as well as in-hospital. In every fifth patient malpositioning of the tube was observed, mostly interlobal after lateral chest tube, however only few were associated with relevant clinical malfunctions. The probability of interlobal malpositioning is significantly higher when using the lateral approach as opposed to the ventral approach. Correction of malpositioned and ineffective chest tubes was necessary in every 17th case. No statistically significant difference between the two approaches for functional malposition was observed. Hence both approaches for emergency chest tube insertion seem to be equally justified.