Perioperative implications of common respiratory problems

Variability in anesthesiologists' approach to the preoperative management of asthmatic children

OBJECTIVE

No consensus guidelines exist for the preoperative treatment of asthmatic children referred for elective surgery. We investigated the attitude of pediatric anesthesiologists to this issue.

DESIGN

A questionnaire survey was conducted.

SETTING

National survey.

SUBJECTS

Certified Israeli pediatric anesthesiologists from all 24 general hospitals in Israel.

MEASUREMENT

Twenty-one questions regarding the approach to preoperative management of asthmatic children including 6 case scenarios with a variety of clinical situations and treatments of asthmatic children. The results were compared with the attitude of pediatric pulmonologists recently published using a similar methodology.

MAIN RESULTS

Forty-four pediatric anesthesiologists from all 24 general hospitals in Israel responded. Twenty-five percent of pediatric anesthesiologists answered that, in addition to pediatric anesthesiologists, the primary pediatrician should be consulted, and 70% believed that a pediatric pulmonologists should also be consulted. Overall, results showed a wide variability between responders especially for preschool children and unstable school-aged asthmatic children for both disciplines. The variability referred to the use of any treatment, bronchodilators, inhaled corticosteroids and their combination, addition of systemic corticosteroids, and the length of preoperative treatment. Compared with pediatric pulmonologists, a better within-discipline agreement was observed by the pediatric anesthesiologists for stable school-aged asthmatic children with a lower inclination to augment preoperative treatment (P< .001). No difference was observed for the preschool children with asthma and for the unstable school-aged asthmatic child.

CONCLUSIONS

A wide variability exists in pediatric anesthesiologists' approach to the preoperative management of asthmatic children for most common case scenarios. This is probably explained by the heterogeneity of asthma, the type of surgery, the lack of guidelines, and the paucity of data. Similarities as well as differences exist between pediatric anesthesiologists and pulmonologists. Further studies and implementation of consensus guidelines are needed.

Pediatric pulmonologists approach to the pre-operative management of the asthmatic child

OBJECTIVE

No consensus guidelines exist for the respiratory treatment of asthmatic children referred for elective surgery. The aim of this study was to evaluate the attitude of pediatric pulmonologists regarding the pre-operative management of these children.

METHODS

A survey of pre-operative management of asthmatic children was conducted. All 48 certified pediatric pulmonologists in Israel completed a questionnaire that comprised 20 questions regarding their approach to pre-operative management including six case scenarios with a variety of clinical situations and treatments of children with asthma.

RESULTS

Response rate was 100%. All believed that pre-operative treatment should be considered in all asthmatic children. Almost 50% suggested that a pediatric pulmonologist should be consulted in all pre-operative assessments. 50% recommended consultation only in individual cases. Overall, results showed a very wide variability between responders especially in pre-school and poorly controlled school children. The variability referred to the use of bronchodilators, inhaled corticosteroids and their combination during the pre-operative days, the addition of systemic CS and the length of pre-operative treatment. Almost all participants suggested either the initiation or augmentation of pre-operative treatment in high risk situations.

CONCLUSIONS

This data demonstrate an important variability among pediatric pulmonologists in Israel regarding the practice of pre-operative treatment of infants and children with asthma especially for the less controlled and high risk children. This is most probably explained by the paucity of evidence-based data and the lack of established guidelines. Consensus guidelines for the pre-operative management of asthmatic children are needed.

Bronchial asthma

PURPOSE OF REVIEW

The aim of this review is to underline the need for an adequate clinical and functional evaluation of respiratory function and asthma control in patients undergoing surgical procedures requiring general anesthesia to obtain useful information for an adequate preoperative pharmacological approach.

RECENT FINDINGS

It has been shown that baseline uncontrolled clinical/functional conditions of airways represent the most important risk factors for perioperative bronchospasm. In nonemergency conditions, asthma patients should undergo clinical/functional assessment at least 1 week before the surgery intervention to obtain, the better feasible control of asthma symptoms in the single patient. Some simple preoperative information given by the patient in preoperative consultation may be sufficient to identify individuals with uncontrolled or poor controlled asthmatic conditions. Spirometric evaluation is essential in individuals with poor control of symptoms, as well as in those patients with uncertain anamnestic data or limited perception of respiratory symptoms, and in those requiring lung resection.

SUMMARY

A better control of asthma must be considered the 'gold standard' for a patient at 'a reasonable low risk' to develop perioperative/postoperative bronchospasm. International consensus promoted by pulmonologists, anesthesiologists, and allergists might be useful to define a better diagnostic and therapeutic approach.

Control of asthma for reducing the risk of bronchospasm in asthmatics undergoing general anesthesia and/or intravascular administration of radiographic contrast media

BACKGROUND

It is well known that patients suffering from bronchial asthma undergoing surgical procedures requiring general anesthesia (GA) or the administration of water soluble radiographic contrast media (RCM) have an increased risk of potentially severe bronchospasm. Nevertheless, little attention has been devoted to the possible preventive measures to reduce the occurrence of this potentially life-threatening event. It has been shown that the most important risk factor for bronchospasm during GA induction and/or the use of RCM is represented by a high degree of bronchial hyperreactivity with airway instability not adequately controlled by long-term anti-inflammatory treatment.

AIMS

The aim of this commentary is to underline the need for an accurate clinical and functional evaluation of asthmatics undergoing surgical procedures requiring GA or radiological procedures requiring the administration of RCM, as well as to suggest a stepwise preventive pharmacological approach for reducing the risk of bronchospasm.

METHODS

The authors' suggestions represent clinical experience of the respiratory section of an internal hospital-based working group whose aim is the prevention of asthmatic/anaphylactic/anaphylactoid reactions during the administration of anesthetics and/or RCM. The MEDLINE database was searched with a combination of keywords: general anesthesia, radio contrast media [and] bronchial asthma. The main limitation of this commentary is the scarcity of available literature on this topic.

FINDINGS

The authors suggest a therapeutic approach before surgical procedures requiring GA and/or RCM administration based on the degree of asthma control as assessed by clinical/functional criteria. In this setting, in addition to the necessity of obtaining the best control of airway reactivity, the authors suggest that an optimal control of asthma symptoms in 'real life' conditions might likely constitute a safety issue in asthmatic patients in the case of emergency procedures.

[The effects of tobacco on children]

INTRODUCTION

Smoking remains an important topic. It is estimated that at present half the children born in France have been, or will be, exposed to the toxic effects of passive smoking. This paper aims to review the evidence of the effects of passive smoking, both intra and extra-uterine.

STATE OF THE ART

Extra-uterine passive smoking is implicated in numerous respiratory (asthma, allergy, infections...) and non respiratory diseases (neoplastic, dental, ophthalmic, digestive, cardio-vascular and infective). Intra-uterine exposure is even more dangerous and leads to abnormalities of the pregnancy (placental abnormalities, prematurity...), of the foetus (behavioural problems, malformations) and long term problems for the unborn child. Passive smoking is responsible for pulmonary morphological abnormalities (pulmonary hypoplasia, reduction in elasticity, increased deposition of collagen and alteration of alveolar structure) and functional disorders (reduced compliance, increased airways resistance, bronchial hyperreactivity). Finally it causes a disturbance of respiratory control, promoting all the factors responsible for sudden cot death.

CONCLUSIONS

The ill effects of passive smoking fully justify efforts to inform and persuade the medical profession of its duty to fight this scourge.

Asthma, surgery, and general anesthesia: a review

Over 20 million Americans are affected with asthma. Many will require some type of surgical procedure during which their asthma management should be optimized. Preoperative assessment of asthma should include a specialized history and physical as well as pulmonary function testing. In many asthmatic patients, treatment with systemic corticosteroids and bronchodilators is indicated to prevent the inflammation and bronchoconstriction associated with endotracheal intubation. The use of corticosteroids has not been shown to adversely affect wound healing or increase the rate of infections postoperatively. Preoperative systemic corticosteroids may be used safely in the majority of patients to decrease asthma-related morbidity.