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Print version ISSN 0034-7094
Rev. Bras. Anestesiol. vol.51 no.3 Campinas May/June 2001
Tracheal intubation difficulty in patient with craniosynostosis. Case report*
Dificuldade de intubação traqueal em paciente com craniossinostose. Relato de caso
Dificultad de intubación traqueal en paciente con craneosinostosis. Relato de caso
Cláudia Luisa Gifoni, M.D.I; Henrique S. Nascimento, M.D.II; Nelson Mizumoto, TSA, M.D.III
CET/SBA do HC da FMUSP
IIAnestesiologista do HC da FMUSP
IIIProfessor Adjunto da Disciplina de Anestesiologia da FMUSP
BACKGROUND AND OBJECTIVES:
There are complex forms craniosynostosis, some of them featuring face and airway
malformations, which may lead to difficult tracheal intubation (TI). This report
aimed at presenting a difficult tracheal intubation case, in a child submitted
to surgery for craniosynostosis correction.
CASE REPORT: Child with 57 days of age, weighing 3700 g, cephalic perimeter 39 cm, physical status ASA II, with craniosynostosis, retrognathia, macroglossia, bilateral exophthalmus, inspiratory difficulty and mild intercostal retraction. In the supine position with a pad under the shoulders, the patient was pre-oxygenated, 10 mg propofol with 5 mg succinylcholine were injected and laryngoscopy was performed (straight blade number 1) without epiglottis visualization. Assisted ventilation was started and four new unsuccessful laryngoscopies attempts were performed. We decided for allowing spontaneous assisted ventilation and a new TI was attempted, also unsuccessful. Capnography showed no exhaled CO2. With the aid of a fibroscope, trachea was finally intubated, but the tube was too narrow and was replaced by a cuffed one. SpO2 was 98% but unstable, sometimes reaching 60%. PETCO2 showed hypocapnia and irregular curve morphology. Auscultation revealed bilateral pulmonary ventilation, but the air was reaching the stomach as well. We suspected of a traumatic tracheal-esophageal fistula. Esophageal endoscopy showed that the tube was actually in the esophagus; since the cuff was inflated in the posterior edematous oral cavity, this would prevent air leakage and allow the tidal volume to ventilate stomach and lungs simultaneously. The tube was then properly introduced in the trachea, once again with the aid of the fibroscope, and surgery was performed.
CONCLUSIONS: It is important to distinguish a simple craniosynostosis from those presenting face and airway malformations. Adequate TI equipment is mandatory and, in addition to basic monitoring, capnography is of great value to confirm tracheal intubation.
Key Words: DISEASE, Neurologic: craniosynostosis; TRACHEAL INTUBATION
JUSTIFICATIVA E OBJETIVOS:
Existem formas complexas de craniossinostose acompanhadas de malformações
da face e das vias aéreas, que podem levar a dificuldade de intubação
traqueal (IOT). O objetivo deste relato é apresentar um caso de intubação
traqueal difícil, em criança submetida à cirurgia para correção
RELATO DO CASO: Criança com 57 dias, 3700 gramas, perímetro cefálico 39 cm, ASA II, com craniossinostose, retrognatia, macroglosia e exoftalmo bilateral, dificuldade inspiratória e retração intercostal leve. Após decúbito dorsal, coxim sob os ombros, pré-oxigenação e infusão de propofol (10 mg) e succinilcolina (5 mg), realizou-se laringoscopia (lâmina nº 1 reta), sem visualização da epiglote. Foi feita ventilação assistida seguida de novas tentativas (4) de IOT, sem sucesso. Optou-se pela ventilação espontânea assistida e IOT, novamente sem sucesso. Pela capnografia não havia CO2 exalado. Com auxílio de fibroscópio intubou-se a traquéia, porém a sonda era estreita e foi trocada por outra com balonete. A SpO2 era de 98%, porém com instabilidades, ás vezes com 60%. A PETCO2 apresentava hipocapnia com morfologia irregular. À ausculta mostrava ventilação pulmonar bilateral, porém com entrada de ar no estômago. Suspeitou-se de fístula tráqueo-esofágica traumática. Com endoscopia esofágica constatou-se que a sonda de intubação estava no esôfago; como o balonete foi insuflado na cavidade oral posterior, que estava edemaciada, impedia o vazamento de gás. O volume corrente ventilava o estômago e os pulmões simultaneamente. A sonda foi introduzida corretamente na traquéia com fibroscópio e realizou-se a cirurgia.
CONCLUSÕES: É necessário distinguir craniossinostose simples daquelas acompanhadas de malformações faciais e de vias aéreas. É fundamental que se tenha equipamentos adequados para IOT e além da monitorização básica, a capnografia é de grande valor na confirmação da intubação traqueal.
Unitermos: DOENÇA, Neurológica: craniossinostose; INTUBAÇÃO TRAQUEAL
JUSTIFICATIVA Y OBJETIVOS:
Existen formas complejas de craneosinostosis acompañadas de malformaciones
de la face y de las vías aéreas, que pueden llevar a dificultades
de intubación traqueal (IOT). El objetivo de este relato es presentar un
caso de intubación traqueal difícil, en un niño sometido a cirugía
para corrección de la craneosinostosis.
RELATO DEL CASO: Niño con 57 días, 3700 gramas, perímetro cefálico 39 cm, ASA II, con craneosinostosis, retrognatia, macroglosia y exoftalmía bilateral, dificultad inspiratoria y retracción intercostal leve. Después decúbito dorsal, cojín sobre los hombros, pré-oxigenación e infusión de propofol (10 mg) y succinilcolina (5 mg), se realizó laringoscopia (lámina nº 1 reta), sin visualización de la epiglotis. Fue hecha ventilación asistida seguida de nuevas tentativas (4) de IOT, sin suceso. Se optó por la ventilación espontanea asistida e IOT, nuevamente sin suceso. Por la capnografía no había CO2 exhalado. Con auxilio de fibroscópio se intubó la traquea, mas la sonda era estrecha y fue cambiada por otra con balonete. La SpO2 era de 98%, pero con instabilidades, a veces con 60%. A PETCO2 presentaba hipocapnia con morfología irregular. La ausculta mostraba ventilación pulmonar bilateral, pero con entrada de aire en el estomago. Se sospechó de fístula tráqueo-esofágica traumática. Con endoscopia esofágica se constato que la sonda de intubación estaba en el esófago; como el balonete fue insuflado en la cavidad oral posterior, que estaba edemaciada, impedía el escape de gas. El volumen corriente ventilaba el estomago y los pulmones simultáneamente. La sonda fue introducida correctamente en la traquea con fibroscópio y se realizó la cirugía.
CONCLUSIONES: Es necesario distinguir craneosinostosis simples de aquellas acompañadas de malformaciones faciales y de vías aéreas. Es fundamental que se tenga equipamientos adecuados para IOT y después de la monitorización básica, la capnografía es de grande valor en la confirmación de la intubación traqueal.
Craniofacial malformations may be accompanied by other congenital defects such as upper airway changes which, in some cases, may impair conventional tracheal intubation via direct laryngoscopy 1-3.
There are complex forms of craniosynostosis with concomitant malformations, such as in Crouzon, Apert and Pfeiffer syndromes, and which should be distinguished from simple craniosynostosis. The most complex presentations come with cranial and facial bones osteosynthesis1.
Perianesthetic problems during surgical correction of such abnormalities include: hypothermia, hydroelectrolitic disturbances, air embolism, blood loss and difficult tracheal intubation 1.
This report aimed at presenting a difficult tracheal intubation in a child submitted to surgical craniosynostosis correction.
Child with 57 days of age, weighing 3700 g, cephalic perimeter 39 cm, physical status ASA II, with the diagnose of metopic and coronary sagital craniosynostosis followed by retrognathia, macroglossia and bilateral exophthalmus (Figure 1 and Figure 2). Patient was normothermic, with inspiratory difficulty, mild intercostal retraction, bilateral vesicular murmur with rhonchus. According to the mother, the child had dispnea during breast feeding and abundant sialorrhea. Respiratory frequency (RF) was 30 irpm and heart rate (HR) was 120 bpm.
Venoclysis was performed in the operating room with a 24G catheter in an upper limb vein. Monitoring consisted of cardioscopy in DII lead, pulse oximetry and non invasive automatic blood pressure measurement. Initial parameters were: 98% SpO2, HR of 125 bpm and BP of 100 x 50 mmHg.
With the child in the supine position and a pad below the shoulders, preoxygenation was performed followed by intravenous injection of 10 mg propofol and 5 mg succinylcholine. Then, direct laryngoscopy with a straight number 1 blade was attempted, but epiglottis was not visualized. We decided to interrupt laryngoscopy, ventilate the child and afterwards, four additional tracheal intubations were attempted without success. Esophageal intubation was demonstrated by the absence of exhaled CO2 in capnography. Child was maintained under spontaneous ventilation and TI was attempted four more times with no success as well, when we asked for the bronchoscopist help, who could not answer immediately. So, TI was attempted again, this time with a ventriculoscopy device and intubation was finally achieved. However, since the tube was too thin, it had to be replaced by a cuffed one. SpO2 was 98% but unstable, sometimes reaching 60%. PETCO2 was low, with irregular trace morphology. Auscultation revealed bilateral pulmonary ventilation, but also detected air entering the stomach. We suspected of a tracheal-esophageal traumatic fistula. Esophageal endoscopy revealed that the tube was in the esophagus; since the cuff was inflated in the posterior oral cavity which at this point showed some edema, this would prevent gas leakage. Tidal volume ventilated simultaneously stomach and lungs. The tube was then adequately introduced in the trachea with a fibroscope, and surgery was performed.
Anesthesia was maintained with sevoflurane and surgery went on normally, with fronto-orbital osteotomy and bone remodeling.
Child was sent intubated to the ICU where, 8 hours later, there was an accidental extubation. Since ventilation conditions were good (SpO2 = 98%), we decided to leave the patient with CPAP only. However, 60 minutes later there was a high respiratory obstruction requiring a new TI, achieved only after one hour.
Child was kept intubated under mechanical ventilation for 48 hours and afterwards under CPAP. Fibrolaryngoscopies were performed every 7 days to evaluate the possibility of extubation, but the presence of severe laryngitis, sub-glotic diffuse edema and decreased glotic cleft counterindicated extubation. Tracheostomy was performed 19 days after surgery.
After tracheostomy, there was a clinical bronchopneumonia which was treated and had good evolution.
Child was discharged 38 days after surgery and is being followed up for diagnostic investigation of a possible genetic syndrome.
Difficult tracheal intubation is a morbidity-mortality factor associated to anesthesia and a challenge for the anesthesiologist, especially when not expected because it increases a lot the risk for complications 2,4.
Several are the factors responsible for a difficult airway. Among them, in children, there are craniofacial malformations, such as isolated craniosynostosis or as part of genetic syndromes such as Crouzon, Apert and Pfeiffer's 1-3.
Craniosynostosis is defined as the early osteosynthesis of one or more cranial bones and may occur both intra uterus or during the first month of life. Although few reports in the literature refer its incidence, one of them shows that it may occur in 1:1,000 births 1.
The limited intracranial space and its consequences are an absolute indication for surgery between 4 and 36 months of life, being 6 months the preferred age 1. However, corrections before the 4th month may be indicated if the malformation is life threatening. Neurological changes, respiratory failure and feeding difficulties seen in complex craniosynostosis are indications for early surgery 5.
The frequent approaches for difficult tracheal intubation include blind attempts by nasotracheal or retrograde route, or the use of a finger to guide the tube toward the trachea, maneuver which is not always possible in infants due to the narrow opening of the mouth 6,7. Sometimes, a fiber optics laryngoscope is used, even when it is too large to pass through tracheal tubes. In this case, the laryngoscope is used to visualize the larynx and the tracheal tube is inserted with the help of a guide wire 2. Unfortunately some of those methods are traumatic and may cause complications.
Intubation success in those children depends on following an anesthetic protocol rather than improvising 7,8. Predicting the problem is basic to have in hand all necessary devices and develop previously programed steps.
Undoubtedly, prevention starts with an adequate preanesthetic evaluation which may require opinions of endoscopists, ENT specialists and of the intensivist who will follow the child up in the postoperative period 2. Neurosurgeon information is also valuable.
The exchange of information is extremely important. So, the perfect relationship among specialists involved in the treatment is useful for preventing complications, as well as for preparing the follow up plan.
Once a difficult airway is expected, it is fundamental to have available adequate equipment and knowledge of possible techniques to establish a definitive airway, as well as of the anesthetic options. When facing a difficult TI in children, it is accepted that tracheal intubation should be performed under general anesthesia with drugs which allow spontaneous ventilation2,7,8.
Bronchofibroscopy, introduced in the last decade, has proven to be an efficient method and the most indicated one for extremely difficult intubations 9-14. The development of ultra-fine flexible bronchoscopes (2.2 mm diameter) allows TI with tubes starting at 2.5 mm of internal diameter, with low incidence of complications. A study shows the usefulness of such bronchoscope in extremely difficult TIs, such as in children with Pierre Robin syndrome 9. In this syndrome, the patient presents micrognathia, cleft palate and glossoptosis, the degree of which will determine obstructive respiratory failure and a difficult TI. Results have shown that the mean time for TI was 46 seconds in trained personnel's hands 9.
So, training is critical. The incidence of moderate and severe intubation difficulty with this technique varies from 2.3% to 8.5% in the hands of skilled endoscopists 13.
When a fibroscope is not available, retrograde intubation as well as the use of light probes and laryngeal masks have been described 15,16.
The laryngeal mask has been described in the literature both for ventilation when TI is impossible and as an adjuvant in the insertion of the tracheal tube, not only for the attempt of introducing it alone but also with bronchofibroscopy help 15,17.
In our case, although expecting a difficult TI, we had no bronchofibroscope with an adequate diameter for the tracheal tube to be used. So, the fibroscope has allowed larynx visualization and the tracheal tube was introduced with the help of a guide wire. This shows that, with an adequate device, intubation would be easier and less traumatic.
Another interesting fact observed in this case was that, even with the tube tip in the proximal esophagus location with the cuff inflated, it was possible to detect vesicular murmur. This shows the importance of capnography to check the adequate position of the tracheal tube. Figure 3 shows what may have happened in this case.
Excessive larynx manipulation during several peri and postoperative TI attempts led to the appearance of persistent lesions leading to tracheostomy in the 19th postoperative day. Such persistent lesions are in line with other study 18.
It must be always reminded that infants with craniofacial malformations are more prone to develop postoperative ventilatory complications, which may lead to longer intubation time 5.
Concluding, it is necessary to distinguish simple craniosynostosis from craniosynostosis accompanied by facial and airway malformations, suggesting difficult TI. Equipment availability and the anesthesiologist's skills are critical factors for the success of the procedure. Monitoring is also fundamental. SpO2 should not be the only parameter used because the capnography curve is of great value to confirm tracheal intubation.
01. Berg K, Grundmann U, Wilhelm W et al - Craniosynostosis operations in childhood. Anesthesiol Intensivomed Notfallmed Schmerzther, 1997;32:138-150.
02. Crysdale WS, Kohli-Dang N, Mullins GC et al - Airway management in craniofacial surgery: experience in 542 patients. J Otolaryngol, 1987;16:207-215.
03. Vaughan C - Anesthetic management of children with craniofacial anomalies. CRNA, 1997;8:123-134.
04. Voyagis GS, Kyriakis KP, Roussaki-Danou K et al - Evaluating the difficult airway. An epidemiological study. Minerva Anestesiol, 1995;61:483-489.
05. Järund M, Lauritzen C - Craniofacial dysostosis: airway obstruction and craniofacial surgery. Scand J Plant Reconstr Surg Hand Surg, 1996;30:275-279.
06. Borland LM, Swan DM, Leff S - Difficult pediatric endotracheal intubation: a new approach to the retrograde technique. Anesthesiology, 1981;55:577-578.
07. J. Badgwell JM - Tracheal tube and laryngeal mask Placement in routine and difficult airways. Clin Pediatric Anesthesia, 1999;9:399-401
08. Boufflers E, Nahhebicque V, Niset M et al - Téchniques d'anesthésie pour intubation difficile. Ann Fr Anesth Reanim, 1990;9:67-74.
09. Miyahara CM, Almeida AM, Zequi LA et al - Uso do broncoscópio flexível ultra-fino na intubação de crianças portadoras da síndrome de Pierre Robin. Rev Bras Anestesiol, 1996;46:267-272.
10. Finer NN, Muzyka D - Flexible endoscopic intubation of the neonate. Pediatr Pulmonol, 1992;12:48-51.
11. Miyahara CM, Gordon GJ, Gomes FC - Laringoscópio de fibra óptica: uma alternativa técnica para a intubação traqueal. Rev Bras Anestesiol, 1990;40:181-185.
12. Kleeman PP, Jantzen JP, Bonfils P - The ultra-thin bronchoscope in management of the difficult paediatric airway. Can J Anaesth, 1987;34:606-608.
13. Ovassapian A, Yelich SH, Dikes MHM et al - Fiberoptic nasotracheal intubation - incidence and causes of failure. Clinical reports. Anesth Analg, 1983;62:692-695.
14. Wrigley SR, Black AE, Sidhu VS - A fibreoptic laryngoscope for paediatric anaesthesia. Anaesthesia, 1995;50:709-712.
15. Orfei P, Frandina G, Patrizio A et al - L'impiego della maschera laringea per il controllo dele vie aeree e le intubazioni difficili in pediatria. Minerva Anaestesiol, 1999;65:561-569.
16. Osses H, Poblete M, Asenjo F - Laryngeal mask for difficult intubation in children. Paediatr Anaesth, 1999;9:399-401.
17. Golisch W, Hönig JF, Lange H et al - Difficult intubation due to facial malformations in a child. The laringeal mask as an aid. Anaesthesist, 1994;43:753-755.
18. Grzonka MA, Kleinsasser O - Intubation damage to the larynx. Manifestations, comments on pathogenesis, treatment and prevention. Laryngorhinootologie, 1996;75:70-76.
Submitted for publication August 22, 2000
Accepted for publication December 6, 2000
* Received from CET/SBA do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC FMUSP)
01. Berg K, Grundmann U, Wilhelm W et al - Craniosynostosis operations in childhood. Anesthesiol Intensivomed Notfallmed Schmerzther, 1997;32:138-150. [ Links ]
02. Crysdale WS, Kohli-Dang N, Mullins GC et al - Airway management in craniofacial surgery: experience in 542 patients. J Otolaryngol, 1987;16:207-215. [ Links ]
03. Vaughan C - Anesthetic management of children with craniofacial anomalies. CRNA, 1997;8:123-134. [ Links ]
04. Voyagis GS, Kyriakis KP, Roussaki-Danou K et al - Evaluating the difficult airway. An epidemiological study. Minerva Anestesiol, 1995;61:483-489. [ Links ]
05. Järund M, Lauritzen C - Craniofacial dysostosis: airway obstruction and craniofacial surgery. Scand J Plant Reconstr Surg Hand Surg, 1996;30:275-279. [ Links ]
06. Borland LM, Swan DM, Leff S - Difficult pediatric endotracheal intubation: a new approach to the retrograde technique. Anesthesiology, 1981;55:577-578. [ Links ]
07. J. Badgwell JM - Tracheal tube and laryngeal mask Placement in routine and difficult airways. Clin Pediatric Anesthesia, 1999;9:399-401 [ Links ]
08. Boufflers E, Nahhebicque V, Niset M et al - Téchniques d'anesthésie pour intubation difficile. Ann Fr Anesth Reanim, 1990;9:67-74. [ Links ]
09. Miyahara CM, Almeida AM, Zequi LA et al - Uso do broncoscópio flexível ultra-fino na intubação de crianças portadoras da síndrome de Pierre Robin. Rev Bras Anestesiol, 1996;46:267-272. [ Links ]
10. Finer NN, Muzyka D - Flexible endoscopic intubation of the neonate. Pediatr Pulmonol, 1992;12:48-51. [ Links ]
11. Miyahara CM, Gordon GJ, Gomes FC - Laringoscópio de fibra óptica: uma alternativa técnica para a intubação traqueal. Rev Bras Anestesiol, 1990;40:181-185. [ Links ]
12. Kleeman PP, Jantzen JP, Bonfils P - The ultra-thin bronchoscope in management of the difficult paediatric airway. Can J Anaesth, 1987;34:606-608. [ Links ]
13. Ovassapian A, Yelich SH, Dikes MHM et al - Fiberoptic nasotracheal intubation - incidence and causes of failure. Clinical reports. Anesth Analg, 1983;62:692-695. [ Links ]
14. Wrigley SR, Black AE, Sidhu VS - A fibreoptic laryngoscope for paediatric anaesthesia. Anaesthesia, 1995;50:709-712. [ Links ]
15. Orfei P, Frandina G, Patrizio A et al - L'impiego della maschera laringea per il controllo dele vie aeree e le intubazioni difficili in pediatria. Minerva Anaestesiol, 1999;65:561-569. [ Links ]
16. Osses H, Poblete M, Asenjo F - Laryngeal mask for difficult intubation in children. Paediatr Anaesth, 1999;9:399-401. [ Links ]
17. Golisch W, Hönig JF, Lange H et al - Difficult intubation due to facial malformations in a child. The laringeal mask as an aid. Anaesthesist, 1994;43:753-755. [ Links ]
18. Grzonka MA, Kleinsasser O - Intubation damage to the larynx. Manifestations, comments on pathogenesis, treatment and prevention. Laryngorhinootologie, 1996;75:70-76. [ Links ]