Bioethics In Fetal and Infant Surgery
Posted: Sun Nov 09, 2014 12:04 pm
Major Surgeries Were Performed On Infants With No Anesthesia or Pain Relief From the 1940s until 1987 in the US.
The International Society for the Study of Pain defines pain as "an unpleasant experience, sensorial and emotional, associated with tissue damage, actual or potential, described in terms of their damage." Since prehistoric times, the emotional component of pain or meaning of the sensory experience of pain has been interpreted in the cultural context of the time. This has been particularly true for infant children who are unable to articulate their pain.
The practice of not giving anesthesia to babies undergoing major surgeries (like open-heart surgery) was widespread in many parts of the World. For decades, the majority of surgeries performed on fetuses and infants in American hospitals and elsewhere in the world were done without anesthesia and pain medication, during and after the operation. Abdominal surgery for pyloric stenosis and chest surgery for congenital heart problems were the most common forms of infant surgery. These babies were paralyzed yet awake and aware. They couldn't scream in terror because of the neuromuscular drug curare. [Curare: skeletal-muscle–relaxant drug belonging to the alkaloid family of organic compounds. Of botanical origin, it is used in modern medicine primarily as an auxiliary in general anesthesia, frequently with cyclopropane, especially in abdominal surgery. Upon injection, curare acts as a neuromuscular blocking agent to produce flaccidity in striated (striped) muscle (it competes with acetylcholine at the nerve ending, preventing nerve impulses from activating skeletal, or voluntary muscles). It first affects the muscles of the toes, ears, and eyes, then those of the neck and limbs, and, finally, those involved in respiration. In fatal doses, death is caused by respiratory paralysis; Encyclopedia Britannica]. They were trapped in their bodies as surgeons cut their skin, drilled holes into their skulls, prodded their internal organs, and stapled and stitched their surgical wounds. The infant is fully paralyzed and needs artificial respiration.
Physicians of the mid 19th Century believed infant pain was real. J. Forsyth Meigs, M.D., in his textbook, Practical Treatise on the Diseases of Children, published in 1853 described pain in infants thusly: "Pain may almost always be detected by the expression of the face. It gives to the countenance various shades of expression, according to its degree of severity, and its permanency or recurrence at intervals. Pain in the head is said, by Dr. M. Hall, to produce a contracted brow, pain in the belly to occasion an elevation in the upper lip, whilst pain in the chest is chiefly denoted by sharpness of the nostrils. I doubt, however, whether pain in any particular organ imparts an expression to one part of the face rather than to another..."
In 1872 Scientist DR. PAUL FLECHSIG (1847-1929) proposed that babies could not feel pain because myelination of nerve fibers occured at different rates during development and that in the newborn baby both myelinated and nonmyelinated fibers were present with only myelinated fibers believed to be fully functional. The conclusion was that, biologically, newborns were not completely "wired," and thus, their experience of sensory input such as pain was likewise less than completely functional.
Myelination is the process by which a fatty layer, called myelin, accumulates around nerve cells (neurons). Myelin particularly forms around the long shaft, or axon, of neurons. Myelination enables nerve cells to transmit information faster and allows for more complex brain processes. Thus, the process is vitally important to healthy central nervous system functioning. Myelination begins in infancy and continues into adulthood.[http://tweenparenting.about.com/od/phys ... nation.htm]
In 1872 Charles Darwin, in his work, The Expression of Emotions in Man and Animal, adamantly refused to believe that children's facial expressions, cries and tears, convulsive movements, and vascular and breathing changes reflected the sensory or emotional experience of pain, but were just reflex actions, reinforced by habit. Indeed, he said that expressions of pain in the select tribe including "animals, children, savages, and the insane" could under no circumstances imply the awareness of pain. These new scientific theories based on Darwin's theories and the anatomical and histological data from embryology were applied to clinical practice by surgeons and neurologists.
In the 20th century, however, the view that neonates experienced less pain was not strongly advanced. M. Thorek, in his textbook, Modern Surgical Technique, published in 1938, described his views of adequate pediatric anesthesia: "Often no anesthesia is required. A sucker consisting of a sponge dipped in some sugar water will often suffice to calm a baby." Learning theorists pointed to additional "proof" that infants did not experience pain, including: 1. The general absence of childhood memories, 2. The conviction that infants' tracts linking the thalamus to the cortex were not functional and 3. Experimental animal data on "thalamic" animals showing reflex activity when exposed to noxious stimuli. The practical consequence of these advances in science resulted in the undertreatment or no treatment of pain in infants.
Medical opinion began to change in the 1980s. Studies in neonatal pain measured behavioral, physiologic and biochemical responses to pain. While the behavioral changes had been explained as simple learned reflexes, the changes in physiological parameters and O2 saturation after endotracheal intubation were more difficult to explain. Perhaps the most convincing studies demonstrating the real phenomenon of neonatal pain were a series of papers, published in the late 1980s, showing the hormonal and metabolic responses in infants undergoing surgery that were attenuated by general anesthesia. Since that time, numerous pain scales have been proposed to assess pediatric pain.
The definitive study of the human neonatal pain sensory mechanism: Pain and its Effects on the Human Neonate and Fetus, was published by Anand, KJS, Hickey PR. in the New England Journal of Medicine in 1987; 317:1321-1329. They wrote:
"Numerous lines of evidence suggest that even in the human fetus, pain pathways as well as cortical and subcortical centers necessary for pain perception are well developed late in gestation, and the neurochemical systems now known to be associated with pain transmission are intact and functional.... Other responses in newborn infants are suggestive of integrated emotional and behavioral responses to pain and are retained in memory long enough to modify subsequent behavior patterns.... In decisions about the use of these techniques, current knowledge suggests that humane considerations should apply as forcefully to the care of neonates and young nonverbal infants as they do to children and adults in similar painful and stressful situations."
Today, the concept of neonatal and pediatric pain is well-established, and the lesson to be learned by the medical community is the need for caution in applying experimental findings in isolated animal proposals and philosophical theorems to clinical practice. It is ironic to note that at one time in our medical history, a simple unlettered parent could more accurately diagnose pain in their infant child than the most advanced experimental scientist.
Only after a public outcry and lawsuits filed did change start to happen. The American Academy of Pediatrics released its statement on neonatal pain control in September 1987. The AAP stated clearly "that local or systemic pharmacologic agents now available permit relatively safe administration of anesthesia or analgesia to neonates undergoing surgical procedures and that such administration is indicated according to the usual guidelines for the administration of anesthesia to high-risk, potentially unstable patients." The Canadian Paediatric Society states that "the evidence of the need for pain control is strong...."
Even with this information, the practice of neonatal circumcision without anesthesia and pain relief continued. This allowed doctors to conduct experiments into the parameters of extreme pain during the 1980s and 1990s on human babies that would have been prohibited in laboratory animals.
Sources:
Neonatal Pain: The Evolution of an Idea. Doris K. Cope, M.D., Trustee Wood Library-Museum of Anesthesiology http://anestit.unipa.it/mirror/asa2/new ... _0998.html
http://www.cirp.org/library/pain/
http://ltinnin.com/2010/12/30/infant-su ... nesthesia/
The International Society for the Study of Pain defines pain as "an unpleasant experience, sensorial and emotional, associated with tissue damage, actual or potential, described in terms of their damage." Since prehistoric times, the emotional component of pain or meaning of the sensory experience of pain has been interpreted in the cultural context of the time. This has been particularly true for infant children who are unable to articulate their pain.
The practice of not giving anesthesia to babies undergoing major surgeries (like open-heart surgery) was widespread in many parts of the World. For decades, the majority of surgeries performed on fetuses and infants in American hospitals and elsewhere in the world were done without anesthesia and pain medication, during and after the operation. Abdominal surgery for pyloric stenosis and chest surgery for congenital heart problems were the most common forms of infant surgery. These babies were paralyzed yet awake and aware. They couldn't scream in terror because of the neuromuscular drug curare. [Curare: skeletal-muscle–relaxant drug belonging to the alkaloid family of organic compounds. Of botanical origin, it is used in modern medicine primarily as an auxiliary in general anesthesia, frequently with cyclopropane, especially in abdominal surgery. Upon injection, curare acts as a neuromuscular blocking agent to produce flaccidity in striated (striped) muscle (it competes with acetylcholine at the nerve ending, preventing nerve impulses from activating skeletal, or voluntary muscles). It first affects the muscles of the toes, ears, and eyes, then those of the neck and limbs, and, finally, those involved in respiration. In fatal doses, death is caused by respiratory paralysis; Encyclopedia Britannica]. They were trapped in their bodies as surgeons cut their skin, drilled holes into their skulls, prodded their internal organs, and stapled and stitched their surgical wounds. The infant is fully paralyzed and needs artificial respiration.
Physicians of the mid 19th Century believed infant pain was real. J. Forsyth Meigs, M.D., in his textbook, Practical Treatise on the Diseases of Children, published in 1853 described pain in infants thusly: "Pain may almost always be detected by the expression of the face. It gives to the countenance various shades of expression, according to its degree of severity, and its permanency or recurrence at intervals. Pain in the head is said, by Dr. M. Hall, to produce a contracted brow, pain in the belly to occasion an elevation in the upper lip, whilst pain in the chest is chiefly denoted by sharpness of the nostrils. I doubt, however, whether pain in any particular organ imparts an expression to one part of the face rather than to another..."
In 1872 Scientist DR. PAUL FLECHSIG (1847-1929) proposed that babies could not feel pain because myelination of nerve fibers occured at different rates during development and that in the newborn baby both myelinated and nonmyelinated fibers were present with only myelinated fibers believed to be fully functional. The conclusion was that, biologically, newborns were not completely "wired," and thus, their experience of sensory input such as pain was likewise less than completely functional.
Myelination is the process by which a fatty layer, called myelin, accumulates around nerve cells (neurons). Myelin particularly forms around the long shaft, or axon, of neurons. Myelination enables nerve cells to transmit information faster and allows for more complex brain processes. Thus, the process is vitally important to healthy central nervous system functioning. Myelination begins in infancy and continues into adulthood.[http://tweenparenting.about.com/od/phys ... nation.htm]
In 1872 Charles Darwin, in his work, The Expression of Emotions in Man and Animal, adamantly refused to believe that children's facial expressions, cries and tears, convulsive movements, and vascular and breathing changes reflected the sensory or emotional experience of pain, but were just reflex actions, reinforced by habit. Indeed, he said that expressions of pain in the select tribe including "animals, children, savages, and the insane" could under no circumstances imply the awareness of pain. These new scientific theories based on Darwin's theories and the anatomical and histological data from embryology were applied to clinical practice by surgeons and neurologists.
In the 20th century, however, the view that neonates experienced less pain was not strongly advanced. M. Thorek, in his textbook, Modern Surgical Technique, published in 1938, described his views of adequate pediatric anesthesia: "Often no anesthesia is required. A sucker consisting of a sponge dipped in some sugar water will often suffice to calm a baby." Learning theorists pointed to additional "proof" that infants did not experience pain, including: 1. The general absence of childhood memories, 2. The conviction that infants' tracts linking the thalamus to the cortex were not functional and 3. Experimental animal data on "thalamic" animals showing reflex activity when exposed to noxious stimuli. The practical consequence of these advances in science resulted in the undertreatment or no treatment of pain in infants.
Medical opinion began to change in the 1980s. Studies in neonatal pain measured behavioral, physiologic and biochemical responses to pain. While the behavioral changes had been explained as simple learned reflexes, the changes in physiological parameters and O2 saturation after endotracheal intubation were more difficult to explain. Perhaps the most convincing studies demonstrating the real phenomenon of neonatal pain were a series of papers, published in the late 1980s, showing the hormonal and metabolic responses in infants undergoing surgery that were attenuated by general anesthesia. Since that time, numerous pain scales have been proposed to assess pediatric pain.
The definitive study of the human neonatal pain sensory mechanism: Pain and its Effects on the Human Neonate and Fetus, was published by Anand, KJS, Hickey PR. in the New England Journal of Medicine in 1987; 317:1321-1329. They wrote:
"Numerous lines of evidence suggest that even in the human fetus, pain pathways as well as cortical and subcortical centers necessary for pain perception are well developed late in gestation, and the neurochemical systems now known to be associated with pain transmission are intact and functional.... Other responses in newborn infants are suggestive of integrated emotional and behavioral responses to pain and are retained in memory long enough to modify subsequent behavior patterns.... In decisions about the use of these techniques, current knowledge suggests that humane considerations should apply as forcefully to the care of neonates and young nonverbal infants as they do to children and adults in similar painful and stressful situations."
Today, the concept of neonatal and pediatric pain is well-established, and the lesson to be learned by the medical community is the need for caution in applying experimental findings in isolated animal proposals and philosophical theorems to clinical practice. It is ironic to note that at one time in our medical history, a simple unlettered parent could more accurately diagnose pain in their infant child than the most advanced experimental scientist.
Only after a public outcry and lawsuits filed did change start to happen. The American Academy of Pediatrics released its statement on neonatal pain control in September 1987. The AAP stated clearly "that local or systemic pharmacologic agents now available permit relatively safe administration of anesthesia or analgesia to neonates undergoing surgical procedures and that such administration is indicated according to the usual guidelines for the administration of anesthesia to high-risk, potentially unstable patients." The Canadian Paediatric Society states that "the evidence of the need for pain control is strong...."
Even with this information, the practice of neonatal circumcision without anesthesia and pain relief continued. This allowed doctors to conduct experiments into the parameters of extreme pain during the 1980s and 1990s on human babies that would have been prohibited in laboratory animals.
Sources:
Neonatal Pain: The Evolution of an Idea. Doris K. Cope, M.D., Trustee Wood Library-Museum of Anesthesiology http://anestit.unipa.it/mirror/asa2/new ... _0998.html
http://www.cirp.org/library/pain/
http://ltinnin.com/2010/12/30/infant-su ... nesthesia/