Types of Anesthesia
There are three types of anesthesia: general, regional, and sedation. The type of anesthesia administered is dependent upon many factors. The type of surgery, the age of the patient, the medical condition of the patient, and patient preference all play a role in determining the appropriate type of anesthesia to administer.
GENERAL ANESTHESIA
In most cases, general anesthesia is the anesthetic of choice for the pediatric patient. General anesthesia can be induced (started) either by inhalation (breathing) of the anesthetic gas via a face mask or by intravenous (IV) injection of anesthetic medications. An inhalation induction is preferable in most cases because there is no need to place a catheter in the vein prior to the child being asleep. In this way, the child does not experience any painful procedure.
Inhalation induction:
Upon entering the operating room, an attempt will be made to place monitors on the child prior to the start of the anesthetic induction. These include; an electrocardiogram to monitor the heart rate and rhythm, blood pressure cuff to monitor the blood pressure, a pulse oximeter to monitor the level of oxygen in the blood, a stethoscope to listen to heart and breath sounds, and a temperature probe to monitor temperature. In some instances, the child will not be cooperative for placement of these monitors prior to the induction of anesthesia and they will be placed once the child is asleep. A clear facemask that was pretreated with a pleasant smell (bubble gum or cherry) will be placed over the child’s nose and mouth. Oxygen and the anesthetic gases are delivered through the facemask. After a few breaths, the anesthetic gas will begin to take effect. At this time, monitors are placed, if they were not attached previously, and a catheter is inserted into a vein. Depending on the surgery, an endotracheal tube (breathing tube) may be placed into the trachea (windpipe) for better control of the airway and breathing.
Intravenous induction:
In certain circumstances, when an inhalation induction may not be safe, induction of anesthesia can be accomplished by injecting anesthetic medications through a catheter into the vein. An IV induction may also be used if an intravenous catheter is already present or if preferred by the child. The advantage of this type of induction is that it is rapid and the child does not have to breathe the anesthetic gases, which may be unpleasant despite the scent placed on the mask. The disadvantage of this method is the need to place a catheter into the vein, which involves a needle stick. If planned far enough in advance, a special ointment that numbs the skin can be applied to the area(s) where the IV will be placed. This ointment takes at least 45 minutes to take effect.
REGIONAL ANESTHESIA
Regional anesthesia numbs the area that is being operated upon. This is accomplished by injecting local anesthetics in the area of the nerves that supply the part of the body that is being operated on. This type of anesthesia, especially in the younger patients, is usually accompanied by general anesthesia. The benefit of using both techniques is that the regional anesthetic will decrease the amount of general anesthesia needed and will provide postoperative pain relief as well.
SEDATION
This type of anesthesia provides pain relief and makes the patient sleepy, but not unconscious. In some situations, additional sedation may be required. This is often indistinguishable from general anesthesia.
Post Anesthesia Care Unit
After the procedure is completed, your child will be awakened in the operating room and transported to the Post Anesthesia Care Unit (PACU). In the PACU, after vital signs are taken and report is given to the nurse who will be taking care of your child, one parent will be allowed at the bedside. If the PACU is not very busy, the nurse in charge may allow both parents in at the same time.
The usual stay in the PACU for patients going home the same day of surgery is 1-2 hours. During that time, your child is monitored for any problems that may arise. The liberal use of intravenous fluids in the operating room and PACU precludes the need to drink before going home. It is not unusual for patients to get carsick after anesthesia.
Your child may be quiet or crying upon arrival to the PACU. Both are normal behaviors after anesthesia. Children usually calm down soon after arrival to the PACU, when they are fully awake and with their parent(s). Sometimes they may need additional pain medication, which will be administered by the PACU nurse. Some children may experience emergence delirium when awakening from general anesthesia. This consists of restlessness, disorientation, crying, combativeness, and difficulty in communicating. Although distressing to see, it is not an unusual event and usually resolves quickly. During this time it is important to comfort and reassure your child while making sure that the child does not hurt him/herself.