Neck haematoma and airway obstruction in a pre-eclamptic patient: a complication of internal jugular vein cannulation

Obstetric Anaesthetists' Association and Difficult Airway Society guidelines for the management of difficult and failed tracheal intubation in obstetrics

The Obstetric Anaesthetists' Association and Difficult Airway Society have developed the first national obstetric guidelines for the safe management of difficult and failed tracheal intubation during general anaesthesia. They comprise four algorithms and two tables. A master algorithm provides an overview. Algorithm 1 gives a framework on how to optimise a safe general anaesthetic technique in the obstetric patient, and emphasises: planning and multidisciplinary communication; how to prevent the rapid oxygen desaturation seen in pregnant women by advocating nasal oxygenation and mask ventilation immediately after induction; limiting intubation attempts to two; and consideration of early release of cricoid pressure if difficulties are encountered. Algorithm 2 summarises the management after declaring failed tracheal intubation with clear decision points, and encourages early insertion of a (preferably second-generation) supraglottic airway device if appropriate. Algorithm 3 covers the management of the 'can't intubate, can't oxygenate' situation and emergency front-of-neck airway access, including the necessity for timely perimortem caesarean section if maternal oxygenation cannot be achieved. Table 1 gives a structure for assessing the individual factors relevant in the decision to awaken or proceed should intubation fail, which include: urgency related to maternal or fetal factors; seniority of the anaesthetist; obesity of the patient; surgical complexity; aspiration risk; potential difficulty with provision of alternative anaesthesia; and post-induction airway device and airway patency. This decision should be considered by the team in advance of performing a general anaesthetic to make a provisional plan should failed intubation occur. The table is also intended to be used as a teaching tool to facilitate discussion and learning regarding the complex nature of decision-making when faced with a failed intubation. Table 2 gives practical considerations of how to awaken or proceed with surgery. The background paper covers recommendations on drugs, new equipment, teaching and training.

Airway obstruction due to a pre-vertebral haematoma following difficult central line insertion--implications for ultrasound guidance and review of the literature

We describe a case of airway obstruction secondary to a large pre-vertebral cervico-mediastinal haematoma following failed attempts at insertion of an internal jugular central venous line. The need for a high index of suspicion to diagnose this injury and early aggressive intervention to manage it are outlined. The role of ultrasound guidance in preventing such a complication is reviewed, as well as other possible mechanisms of haematoma development.

Comparison of Routine Chest Radiograph Versus Clinician Judgment to Determine Adequate Central Line Placement in Critically Ill Patients

BACKGROUND

Central venous catheterization (CVC) is routine in the management of critically ill patients. However, this procedure has complications, generally mandating a postprocedural chest radiograph (CXR) to confirm adequate position and to rule out procedure-related complications. We sought to determine whether clinician judgment could reliably predict complications and malpositioning after CVC placement, thus obviating the need for a postprocedural CXR on all lines placed.

METHODS

Prospective observational study of patients undergoing central line placement in the trauma, surgical, and burn intensive care units during a 12-month period. After placement, a questionnaire addressing comorbidities and the technical aspects of the procedure was completed by the clinician placing the line. The clinical impression regarding line placement was then compared with the findings on a postprocedural CXR.

RESULTS

In 147 patients, 209 CVCs were performed (mean age of 52 +/- 21 years). The population was 52% burn and 48% trauma or general surgery patients. The subclavian position was used in 78%. Ninety four percent of CVCs were without complication, whereas 3% were malpositioned and 2% resulted in pneumothorax (one delayed diagnosis at 24 hours). The incidence of complications was associated with level of training of the physician placing the line as well as the number of attempts necessary to access the vein. Clinical judgment correctly identified malpositioning in 20% of cases, and pneumothorax in 67% of cases. The person placing the line thought 68% of the CVCs were uncomplicated (corresponding complication rate 2.3%), whereas 25% thought they were technically difficult (corresponding complication rate 1%), and the remainder thought either they were associated with complications or technically not feasible, all with corresponding complications. Overall, clinical judgment had a sensitivity of 71%, specificity of 44%, positive predictive value of 97%, and negative predictive value of 6%, for an overall accuracy of only 70%.

CONCLUSION

Clinical judgment does not reliably predict malpositioning after CVC or the presence of postprocedural complications. Chest X-ray after CVC placement in the critically ill should remain the standard of care.

Confirmatory Chest Radiographs after Central Line Placement: Are They Warranted?

OBJECTIVES

This study was designed to determine the ability of physicians to predict complications associated with the placement of central venous access devices and to decide whether a confirmatory chest radiograph is warranted after placement.

METHODS

Patients receiving central venous access on an inpatient and outpatient gynecologic oncology service were studied. Data were collected regarding patient demographics, patient history, procedural details of the placement, and the type of catheter used. The physician then predicted which patients had a reasonable potential for placement complications. All of the patients then underwent radiography, which was then compared with the original prediction.

RESULTS

Ninety-eight patients who had central venous access devices placed were included in the study. Eighty of the 81 central lines thought by the practitioner to have been placed without incident caused no significant complications; one individual in this group had a minor pneumothorax. Two of 17 patients predicted to have complications were noted to have a pneumothorax that required hospitalization. No patients in the low-risk group were hospitalized for a placement complication, whereas two hospitalizations occurred in the high-risk group.

CONCLUSION

Confirmatory chest radiographs may potentially be omitted in certain cases after line placement when experienced clinicians use good technique, good clinical judgment, and discrimination.

Venous pseudo-aneurysm as a late complication of short-term central venous catheterisation

Complications following central venous catheterisation abound in the medical literature. This reflects the under-estimated potential hazards associated with this procedure as well as an increase in the number of such procedures performed in high-risk patients. We report on a case where a venous pseudo-aneurysm developed four months after the removal of a short-term central venous catheter in a moderately high-risk patient.

Neck haematoma and airway obstruction in a patient with goitre: complication of internal jugular vein cannulation

Attempted jugular vein cannulation in a patient with a discrete goitre resulted in a rapid growing haematoma and airway obstruction. This life-threatening complication is rare, and is usually related to two conditions: pre-existing coagulopathy and/or arterial puncture by a large bore cannula or vessel dilator. None of these was present in this patient. Investigations revealed a retrosternal goitre causing tracheal compression and major changes in the calibre and the anatomical relationships of neck vessels. Possible origin and mechanism for the sudden haematoma are discussed, as well as the airway management. This case clearly illustrates how internal jugular vein cannulation using the traditional blind technique, guided by external landmarks, can be extremely hazardous in patients with distorted anatomy of the neck.

Ruptured superior thyroid artery from central vein cannulation: treatment by coil embolization

Central vein cannulation is associated with several complications, some of which may be fatal. This case report describes a life-threatening complication after insertion of a central venous line. An obese female patient with end-stage renal failure due to nephrotic syndrome developed a huge neck swelling and sudden airway obstruction after attempted cannulation of the internal jugular vein for haemodialysis. Tracheal intubation was achieved using a gum-elastic bougie. Investigations revealed abnormal blood clotting. The coagulopathy was treated, but the neck swelling continued to increase in size. Carotid angiography showed a ruptured right superior thyroid artery. The haemorrhage was controlled by coil embolization of the artery. This case report demonstrates the usefulness of the gum-elastic bougie in the presence of a difficult airway and of interventional radiology in the management of vascular accidents.