Technical Report


Surfactant administration through laryngeal supraglottic airway (SALSA): A unique and new technique of surfactant administration

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1 Consultant Neonatologist Consultant Pediatrician, Head of Neonatology Department, Emirates Specialty Hospital DHCC, Dubai, UAE

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Monika Kaushal

Consultant Neonatologist Consultant Pediatrician, Head of Neonatology Department, Emirates Specialty Hospital DHCC, Dubai,

UAE

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Article ID: 100008M01MK2020

doi: 10.5348/100008M01MK2020TR

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Kaushal M, Asghar S, Kaushal A, Augustine P, Alex M. Surfactant administration through laryngeal supraglottic airway (SALSA): A unique and new technique of surfactant administration. Edorium J Matern Child Health 2020;5:100008M01MK2020.

ABSTRACT


Respiratory distress syndrome (RDS) is one of the morbidities of prematurity. Surfactant has radicalized the treatment of RDS. Despite the widespread use the ideal method of surfactant administration is still evolving. There are some infants who cannot be intubated due to airway abnormality. Laryngeal mask airway (LMA) is one alternative to provide ventilation. There is dearth of evidence of laryngeal mask airway (LMA) use in infants born below 34 weeks of gestation. When such infants need surfactant, the evidence is lacking if can be administered through LMA. We present a case along with video of the feasibility of ventilating baby below 34 weeks with LMA as well as administering surfactant through a relatively new technique surfactant administration through laryngeal supraglottic airway (SALSA).

Keywords: Laryngeal mask airway, Surfactant

Introduction


Preterm babies are born with immature lungs and usually are deficient in surfactant. Fujiwra first administered surfactant in 1980 in preterm as therapy for hyaline membrane disease [1]. This is first therapy which was intended to be used only for the neonates. Over years we have tried different modes of administering the surfactant. As we are advancing, we understood that less invasive we are, better is the outcome as far as morbidity and mortality is concerned. We started our journey with intratracheal administration of surfactant followed by ventilation. Soon the side effects of prolonged ventilation on preterm lungs were recognized. Intubation surfactant extubation (INSURE) was a technique started to reduce the ventilatory associated lung injury [2]. Even brief period of ventilation was damaging to the fragile preterm lungs and hence other Less Invasive Surfactant Administration (LISA) and Minimal Incase Surfactant (MIST) were tried and found to be successful [3]. Sometimes we have babies who have difficult airway like Pierre Robin syndrome, Cornelia de Lange, cleft palate, and Beckwith–Wiedemann syndrome where it becomes difficult to intubate. In such cases airway is secured with laryngeal mask airway (LMA) [4],[5],[6],[7]. Laryngeal mask airway is recommended to be used for neonatal resuscitation [8]. Schmölzer et al. in a systematic review on supraglottic airway devices in neonatal resuscitation established that resuscitation with an LMA was viable and harmless in infants of >34 weeks’ gestational age (GA) and a birth weight WO 6 (BW) >2,000 g [4].

Laryngeal mask airway is less invasive to the lungs and the neonate is exposed to a lower hemodynamic strain reaction throughout LMA positioning and removal. Laryngoscopy and tracheal intubation are often associated with complications like local trauma, the stress-response reflex, and malpositioning of the endotracheal tube in the esophagus or deep in right bronchial tree. It may also generate hypertension and cyanosis in infants.

Its practice may be lifesaving in neonates with malformations of the upper airway when tracheal intubation and mask ventilation fail.

Complications of LMA are soft tissue trauma, vomiting, regurgitation, stridor, and if not placed properly may lead to partial airway obstruction and apnea [9],[10].

When these babies require surfactant, we cannot use the same methods to administer it. Surfactant administration through laryngeal supraglottic airway (SALSA) is one such new method. Its new and very few units are practicing it. One single small trial showed LMA surfactant administration in preterm infants ≥ 1200 g with RDS may have a short-term favorable effect on reduced oxygen requirements [11] to have better outcome, correct technique to insert LMA, and administer surfactant is important.

Case


We had one preterm 31-week baby born with macroglossia, micrognathia fitting in criteria of Beckwith–Wiedemann syndrome who required resuscitation at birth but failed intubation due to macroglossia. Laryngeal mask airway was inserted in the baby and ventilation was provided by LMA. In neonatal intensive care unit (NICU) found to have RDS requiring surfactant administration. We administered surfactant through LMA and it was effective. The oxygen requirement and the ventilatory requirement decreased. The baby required a second dose of surfactant which was also given through LMA. The baby tolerated the procedure well and could be brought down on FiO2 requirements.

This instructional video 1 was made to educate the step wise to administer surfactant using new method SALSA technique. As far as we know there is no video on live baby demonstrating the LMA insertion and surfactant administration.

Video 1: Video shows the steps of LMA insertion and surfactant administration through LMA.

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PROCEDURE


  • Prepare equipment/supplies: o Continuous cardiovascular monitoring equipment
    • CO2 detector (Pedicap)
    • Surfactant
    • LISA catheter
    • 3 mL or 5 mL syringe (dose dependent)
    • Large gauge needle (18 g)
    • Alcohol swab 70%
    • Sterile towel or drape
    • Tape measure o Sterile scissors
    • Emergency equipment: Neopuff and mask, suction, laryngoscope
    • LMA (size according to the gestation and weight). Use the correct size of LMA for the patient. Size 1 is suitable for neonates weighing 2.5–5 kg. It has been postulated that a smaller size (0.5) could be useful in preterm newborns.
  • Surfactant administration is a two-person procedure. It should be performed by at least one medical practitioner who administers the surfactant and one registered nurse as the assistant
  • Record baseline observations: heart rate, respiration rate, oxygen saturation, plus a blood gas if required
  • Insert the LMA
    • Fully deflate the cuff, and lubricate the back of the mask tip.
    • Press the tip of the LMA against the hard palate. During this procedure, the practitioner should grasp the LMA like a pen with the index finger at the junction between the mask and the distal end of the airway tube.
    • Gently advance the LMA with one single movement, applying continuous pressure against the palatopharyngeal curvature with the index finger. The path of the force applied must be cranially and not caudally.
    • Continue pushing LMA against soft palate it cannot be pushed further inwards.
    • Inflate the mask to the minimum air volume necessary to ascertain sufficient seal. Do not hold the tube of the LMA during cuff inflation, as the tube may be seen to move out during cuff inflation permitting correct positioning.
    • Connect the proximal end of the airway tube to a CO2 detector (Pedicap) and then to device T piece resuscitator or self-inflating bag. Look for change in color of the CO2 detector which should turn yellow.
  • Slowly warm the vial of surfactant to room temperature before administration.
  • Administering doctor and nurse performs hand hygiene and put on sterile gloves.
  • Using surgical aseptic technique, cut a sterile LISA catheter to the length so that the tip lies 1 cm above the end of the endotracheal tube (usually we take weight plus 6). This safeguards that the surfactant is directed intratracheal. Curosurf/Survanta should not be instilled into a main stem bronchus.
  • Slowly withdraw a little more than required dose into a 3- or 5-mL plastic syringe using a large-gauge needle. Attach the pre-cut LISA catheter to the syringe, prime, or fill the catheter with surfactant to the end.
  • Ensure bed is flat. Place the neonate in supine position. There is no evidence to support the practice of changing positions of neonate during administration.
  • Assistant disconnects the LMA from T piece resuscitator (Neopuff).
  • Doctor administers the surfactant via the pre-cut LISA catheter in a single or two doses as quickly as the neonate tolerates. The total dose is usually given in less than a minute.
  • Surfactant can occlude the LMA and it may have to cease instilling till the tube is cleared and chest wall movement restarts.
  • Reconnect LMA to T piece resuscitator (Neopuff) as soon as possible.
  • Ventilator support or inspired oxygen may need to be temporarily increased.
  • Medical practitioner to remain at bedside until the neonate is stable.

Conclusion


We conclude that LMA is alternative, unique, and effective method of surfactant administration in difficult airway even in preterm babies 31 weeks of gestation.

REFERENCES


1.

Engle WA, American Academy of Pediatrics Committee on Fetus and Newborn. Surfactant-replacement therapy for respiratory distress in the preterm and term neonate. Pediatrics 2008;121(2):419–32. [CrossRef] [Pubmed]   Back to citation no. 1  

2.

Stevens TP, Harrington EW, Blennow M, Soll RF. Early surfactant administration with brief ventilation vs. selective surfactant and continued mechanical ventilation for preterm infants with or at risk for respiratory distress syndrome. Cochrane Database Syst Rev 2007;(4):CD003063. [CrossRef] [Pubmed]   Back to citation no. 1  

3.

Göpel W, Kribs A, Ziegler A, et al., Avoidance of mechanical ventilation by surfactant treatment of spontaneously breathing preterm infants (AMV): An open-label, randomised, controlled trial. Lancet 2011;378(9803):1627–34. [CrossRef] [Pubmed]   Back to citation no. 1  

4.

Schmölzer GM, Agarwal M, Kamlin COF, Davis PG. Supraglottic airway devices during neonatal resuscitation: An historical perspective, systematic review and meta-analysis of available clinical trials. Resuscitation 2013;84(6):722–30. [CrossRef] [Pubmed]   Back to citation no. 1  

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Trawöger R, Mann C, Riha K. Use of laryngeal masks in the resuscitation of a neonate with difficult airway. Arch Dis Child Fetal Neonatal Ed 1999;81(2):F160. [CrossRef] [Pubmed]   Back to citation no. 1  

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Gandini D, Brimacombe J. Laryngeal mask airway for ventilatory support over a 4-day period in a neonate with Pierre Robin sequence. Paediatr Anaesth 2003;13(2):181–2. [CrossRef] [Pubmed]   Back to citation no. 1  

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Leal-Pavey YR. Use of the LMA classic to secure the airway of a premature neonate with Smith- Lemli-Opitz syndrome: A case report. AANA J 2004;72(6):427–30. [Pubmed]   Back to citation no. 1  

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Trevisanuto D, Micaglio M, Ferrarese P, Zanardo V. The laryngeal mask airway: Potential applications in neonates. Arch Dis Child Fetal Neonatal Ed 2004;89(6):F485–9. [CrossRef] [Pubmed]   Back to citation no. 1  

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Esmail N, Saleh M, Ali A. Laryngeal mask airway versus endotracheal intubation for Apgar score improvement in neonatal resuscitation. Egypt J Anaesth 2002;18:115–21.   Back to citation no. 1  

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Zhu XY, Lin BC, Zhang QS, Ye HM, Yu RJ. A prospective evaluation of the efficacy of the laryngeal mask airway during neonatal resuscitation. Resuscitation 2011;82(11):1405-9. [CrossRef] [Pubmed]   Back to citation no. 1  

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Abdel-Latif ME, Osborn DA. Laryngeal mask airway surfactant administration for prevention of morbidity and mortality in preterm infants with or at risk of respiratory distress syndrome. Cochrane Database Syst Rev 2011;(7):CD008309. [CrossRef] [Pubmed]   Back to citation no. 1  

SUPPORTING INFORMATION


Author Contributions

Monika Kaushal - Conception of the work, Design of the work, Acquisition of data, Drafting the work, Revising the work critically for important intellectual content, Final approval of the version to be published, Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Saima Asghar - Acquisition of data, Drafting the work, Revising the work critically for important intellectual content, Final approval of the version to be published, Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Ayush Kaushal - Drafting the work, Final approval of the version to be published, Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Prima Augustine - Acquisition of data, Drafting the work, Final approval of the version to be published, Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Merena Alex - Acquisition of data, Drafting the work, Final approval of the version to be published, Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Guaranter of Submission

The corresponding author is the guarantor of submission.

Source of Support

None

Consent Statement

Written informed consent was obtained from the patient for publication of this article.

Data Availability

All relevant data are within the paper and its Supporting Information files.

Conflict of Interest

Authors declare no conflict of interest.

Copyright

© 2020 Monika Kaushal et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.


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