Procedural Sedation: Let’s Review the Basics

Code cart
 Defibrillator
 Emergency airway equipment
• Face masks
• Self-inflating bag-valve-mask setup
• Oro- and nasopharyngeal airways
• Laryngeal mask airways (LMAs)
• Laryngoscope handles and blades
• Endotracheal tubes and stylettes
Oxygen source
 May be from wall or oxygen tank, but should be able to provide positive pressure for at least 60 min or the minimum time required to be able to continuously support a patient during transfer to another medical facility or another area within the medical facility
Suction (both Yankauer-type and suction catheters for endotracheal tubes)
Vascular access equipment
 Intravenous catheters
 Intraosseous needle
 Equipment to place, secure, and use the catheters (i.e., tubing, tape, arm boards, alcohol wipes, tourniquets, syringes, etc.)
Reversal agents
 Naloxone or nalmefene for opioid reversal
 Flumazenil for benzodiazepine reversal
Monitoring equipment
 Pulse oximetry
 Three-lead electrocardiogram
 Noninvasive blood pressure monitoring
 End-tidal CO2 monitoring
Means of two-way communication
Adequate lighting, electricity, and space
Medical record for documentation
Source: Data from Henderson and Womack [11] and from Cote et al. [5]

Monitoring

A number of physiologic parameters should be monitored to ensure the safety of the patient. The most recent guidelines from the AAP state that there should be a “functioning pulse oximeter with size-appropriate oximeter probes and other monitors as appropriate for the procedure (e.g., noninvasive blood pressure, respiratory rate, heart rate, electrocardiogram [ECG], capnography and a precordial stethoscope is encouraged in those circumstances in which the patient is not easily visible)” [5]. In July 2011, the American Society of Anesthesiologists updated the Standards for Basic Anesthetic Monitoring. These standards specify that “during moderate or deep sedation the adequacy of ventilation shall be evaluated by continual observation of qualitative clinical signs and monitoring for the presence of exhaled carbon dioxide unless precluded or invalidated by the nature of the patient, procedure or equipment” [12].

Protocols

Protocols or algorithms for how to activate back-up emergency services are essential for every setting where procedural sedation is practiced [5]. For nonhospital facilities, this includes the activation of the Emergency Medical Service (EMS) system and ambulance/transport services to the receiving hospital. It is implicit that the availability of EMS services does not obviate the practitioner’s responsibility in providing initial management and rescue of the potential complications of the sedation.
There need to be written guidelines and protocols for the preprocedure assessment as well as for the monitoring of the patient during and following the procedure. Table 3.2 lists the information that should be obtained in a preprocedure assessment [5]. Documentation during the procedure should be a time-based record of the monitored physiologic parameters and the timing, dosage, and effect of the administered drugs. This should start with the “time out,” during which time the patient’s name, procedure to be performed, and the site of the procedure are confirmed [10]. All complications, unanticipated patient reactions, and ensuing treatment should be documented. Finally, there must be instructions for patients and families for care of the patient postprocedure and following discharge, including contact information should there be a concern after the patient is discharged.
Table 3.2
Preprocedure health assessment
Age of the patient
Weight of the patient
Health history
• Allergies and previous adverse drug reactions
• Medication history
• Relevant medical diseases, physical anomalies, or neurologic impairment that might increase the potential of airway obstruction
• Pregnancy status
• Relevant past hospitalizations and surgeries
• History of sedation or anesthesia, especially with regard to complications or adverse outcomes
• Relevant family history, especially with regard to anesthesia
Review of systems focusing on cardiac, pulmonary, renal, and hepatic function that might alter the patient’s response to the medications used in the procedure
Vital signs
Physical examination, including a focused evaluation of the airway
Physical status evaluation (i.e., ASA classification)
Name and contact information of the patient’s medical home
Source: Data from Cote et al. [5]

Patients

The practice of pediatrics is dependent on having an understanding of how patients change over time. From infancy to adolescence, children undergo tremendous physical, cognitive, and mental development. Where a patient is in his/her development will alter how we as physicians interact with our patients. An understanding of the child’s cognitive development is paramount to effectively manage a patient who is about to undergo a medical procedure.
While the pain from a medical procedure may be short-lived, there is recent data to suggest that there are long-term detrimental effects on neuronal development, pain threshold and sensitivity, coping strategies, and pain perception [13]. While procedural sedation may remove the acute pain, the anxiety surrounding the procedure may actually heighten the pain experience or the patient’s response to pain [13]. As such, how we prepare a patient for a medical procedure may have tremendous subsequent impact [14]. Recommendations regarding preparation for the procedure can be partitioned into timing, format, and content.
Timing refers to when one informs a patient about the procedure that is going to happen. Data suggest that information provided too far in advance of a procedure may serve to increase anxiety: Children may dwell on or exaggerate the anticipated pain or forget the pertinent information completely [13]. On the other hand, inadequate time to process the information about a procedure may heighten stress. Patients undergoing a major medical procedure (e.g., surgery) will need more advanced timing as compared to something more routine, such as the administration of a vaccine. The timing will also be influenced by the developmental stage of the patient. In general, children who cannot reason or think abstractly will benefit less from early advanced information.
Format refers to how information about a procedure is conveyed. Examples of various formats include models, puppets, schematic drawings, etc. The appropriate format to be used depends greatly on one’s cognitive development. For instance, young children who are at an egocentric phase of their development may not have the cognitive maturity to understand role playing with a puppet or doll.
The content about a procedure should relay information about the procedure itself and what the patient can expect. Accurate expectations will allow a patient to gain a sense of self-control and better cope with what is about to happen. As with timing and format, the content is greatly influenced by the developmental stage of the patient. Table 3.3 presents the sequential stages of cognitive development and the accompanying strategies to prepare a patient for a medical procedure [15].
Table 3.3
Childhood developmental considerations for preprocedure preparation
Age (years)
Characteristics
Strategy for preprocedure preparation
1–4
Understanding of world through sensory experiences
Use real objects to help child master the situation
Egocentric
Reinforce good behavior
Trusts primary caregiver
Keep parent with child as much as possible
Animism
Understanding > verbal ability
4–10
Development of reasoning
Allow time for questioning
Elimination of egocentrism
Provide detail
Improved verbal communication
Use concrete teaching materials and simple medical terms
10+

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Nov 2, 2016 | Posted by in PEDIATRICS | Comments Off on Procedural Sedation: Let’s Review the Basics

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