Regional analgesia in the intensive care unit. Principles and practice

Regional analgesia in intensive care

JUSTIFICATIONS AND OBJECTIVES: regional analgesia plays an important role in multimodal pain management in critically ill patients, minimizing patient discomfort and reducing the associated physiological and psychological stress. Lower doses of systemic opioids reduce some of its side effects, such as withdrawal syndrome, possible psychological changes, and gastrointestinal dysfunction. Despite these benefits, its use is controversial, as patients in intensive care units often have contraindications, such as coagulopathy, hemodynamic instability, and difficulty in neurological assessment and implementation of regional technique.

CONTENT

The authors present a review of regional analgesia in intensive care, focusing on the main advantages and limitations of its use in critically ill patients, and describe the most commonly used regional techniques and its applicability.

Regional anesthesia and analgesia in critically ill patients: a systematic review

Regional anesthesia has become invaluable for the treatment of pain during and after a wide range of surgical procedures. However, its benefits in the nonsurgical setting have been less well studied. Regional anesthesia is an appealing modality for critically ill patients, providing focused and sustained pain control with beneficial systemic effect profiles. Indications for regional anesthesia in this patient group are not limited to surgical and postsurgical analgesia but expand to the management of trauma-related issues, medical conditions, and painful procedures at the bedside. Patients in the critical care unit present special challenges to the regional anesthesiologist, including coagulopathies, infections, immunocompromised states, sedation- and ventilation-associated problems, and factors potentially increasing the risk for systemic toxicity. This review is intended to evaluate the role of regional anesthesia in critically ill patients, to discuss potential benefits, and to provide a summary of the published evidence on the subject.

Pain management in the ICU

Pain management in the intensive care unit (ICU) is a complex process. Both the experience of pain as well as its treatment can have consequences relating to the overall outcome of the patient. Further, lack of the ability of many patients in the ICU to communicate their distress makes it even more critical for the ICU practitioner to understand the typical causes of pain in this setting and the applicability of many pain management regimens.

Economic evaluation of sustained sedation/analgesia in the intensive care unit

Lorazepam, midazolam, propofol and opioids are the primary agents that are used for sustained sedation and analgesia of critically ill patients. The choice of agent depends on safety profiles, expected outcomes, cost, patient characteristics and clinical experience. Few studies have comparatively evaluated the sedatives in terms of cost. Many factors, aside from drug costs, influence the total cost of sedation in the intensive care unit. This article reviews the cost parameters of intensive care unit sedation that are specific to the characteristics of commonly used sedatives and analgesics, evaluates economic studies and cost models, summarises alternative methods of sedation and analgesia, and provides practical recommendations for methods of cost containment, including daily sedation interruption, sedation monitoring and protocol implementation.

Consensus guidelines on sedation and analgesia in critically ill children

OBJECTIVE

The United Kingdom Paediatric Intensive Care Society Sedation, Analgesia and Neuromuscular Blockade Working Group is a multi-disciplinary expert panel created to produce consensus guidelines on sedation and analgesia in critically ill children and forward knowledge in these areas. Sedation and analgesia are recognised as important areas of critical care practice and adult clinical practice guidelines in these fields remain amongst the most popular of those produced by the Society of Critical Care Medicine. However, similar clinical practice guidelines have not previously been produced for the critically ill paediatric patient.

DESIGN

A modified Delphi technique was used to allow the Working Group to anonymously consider draft recommendations in three Delphi rounds with predetermined levels of agreement. This process was supported by a total of four consensus conferences. Once consensus had been reached, a systematic review of the available literature was carried out.

OUTCOME

A set of consensus guidelines was produced including 20 key recommendations, 10 relating to the provision of analgesia and 10 relating to the sedation of critically ill children. An evaluation of the existing literature supporting these recommendations is provided.

CONCLUSIONS

Multi-disciplinary consensus guidelines for maintenance sedation and analgesia in critically ill children have been successfully produced and are supported by levels of evidence (excluding sedation and analgesia for procedures and excluding neonates). The working group has highlighted the paucity of high-quality evidence in these important clinical areas and this emphasises the need for further randomised clinical trials in this area.