StayCurrentMD · Thoracoscopic Esophageal Atresia Repair Tips & Tricks: Update Course 2018
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Video23 min·Published Aug 2018Older

Thoracoscopic Esophageal Atresia Repair Tips & Tricks: Update Course 2018

With Dr. Steve Rothenberg

Chapter 1 of 6 · Fundamentals

Positioning evolution

Evolution of Technique and Patient Positioning

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What the experts said59 expert statements · 1 host summary
The first thoracoscopic TEF Type C repair was performed in 2000.
Clinical
Single-lung ventilation is not required for thoracoscopic TEF repair; CO₂ insufflation at low flow (1 L) and low pressure (4–6 mmHg) is sufficient.
Clinical
End-tidal CO₂ increases during thoracoscopic TEF repair, and anesthesiologists must accept CO₂ levels in the high 40s to low 50s mmHg.
Clinical
Anesthesiologists should increase ventilation rate rather than tidal volume or peak inspiratory pressure to manage elevated CO₂, as increased pressures will re-expand the lung and obstruct the surgical field.
Clinical
All babies desaturate initially when the lung is collapsed, but most recover within a couple of minutes.
Clinical
Babies with congenital heart disease require specific cardiac anesthesia for thoracoscopic TEF repair.
Clinical
Modified patient positioning at 45° prone (rather than full lateral) allows gravity to retract the lung, which is the biggest obstacle in thoracoscopic TEF repair.
Clinical
99% of thoracoscopic TEF repairs can be performed using only ports without additional incisions.
Clinical
The scope should be positioned far enough posterior to look down into the posterior mediastinum rather than up over the horizon, reproducing the view of an open thoracotomy.
Clinical
The smallest patient operated on thoracoscopically for TEF repair was 1 kg, requiring modified port placement.
Clinical
The scope port should be positioned just below and behind the tip of the scapula, with the left hand port just below and slightly behind the scope port so that right and left hands are at 90° during the critical anastomosis portion.
Clinical
A 30° scope is used for thoracoscopic TEF repair.
Clinical
The front row of anastomotic sutures is placed extraluminally.
Clinical
The azygos vein is divided using vessel sealing devices to prevent bleeding during suturing, though some surgeons preserve it believing it may reduce stricture rates.
Clinical
Vessel sealing devices are safer than monopolar cautery for dissection because there is no energy spread and less risk of surrounding tissue injury.
Clinical
The vagus nerve should be preserved during fistula dissection.
Clinical
In very small patients where a 5 mm clip cannot be used, the fistula is suture-ligated instead.
Clinical
Clip ligation of the fistula is the fastest method to restore ventilation, as anesthesiologists have difficulty ventilating patients until the fistula is controlled due to significant tidal volume loss through large fistulas.
Clinical
Trifurcation fistulas (entering at the carina) tend to create longer gaps than typical Type C fistulas.
Clinical
Type C esophageal atresias are not considered long-gap defects.
Clinical
The plane between the esophageal pouch and membranous trachea is easier to visualize thoracoscopically than through open thoracotomy.
Opinion
When the upper pouch is densely adherent to the trachea, dissecting higher on the esophageal pouch makes the plane between esophagus and trachea more apparent.
Clinical
Upper pouch fistulas, when present, are identified during bronchoscopy performed before pure esophageal atresia repairs.
Clinical
The membranous tracheal wall cannot be visualized as well through open thoracotomy even with loupes as it can be seen thoracoscopically.
Opinion
In thoracoscopic TEF repair, the most difficult part is avoiding injury to the membranous trachea, as there is sometimes almost a common wall between the pouch and trachea.
Clinical
The tip of the upper pouch is where it is most adherent to the trachea, with almost no real plane present; the plane becomes easier to identify higher up on the pouch.
Clinical
At the point where the upper pouch and trachea share a common wall, the safest dissection plane is submucosal on the esophagus to avoid entering the trachea.
ClinicalRusty
Pediatric surgeons have an incredibly high rate of recurrent laryngeal nerve injuries.
EpidemiologicalRusty
The left recurrent laryngeal nerve is located just on the other side of the esophagus-trachea junction and should be identified and pushed away; it is closer to the esophagus than the trachea, especially higher up.
ClinicalRusty
The magnified thoracoscopic view allows easier identification of the recurrent laryngeal nerve compared to open surgery.
Opinion
All H-type fistulas are now repaired thoracoscopically because the nerve can be better identified than through a neck incision with blunt dissection.
Clinical
With blunt dissection, there is minimal danger of damaging the recurrent laryngeal nerve.
ClinicalDavid
The fistula is not divided immediately but left in place until ready for ligation, because dividing it early leads to difficulty finding it later.
Clinical
In longer-gap repairs, the distal fistula is mobilized all the way down to the diaphragm without breaching the hiatus.
Clinical
The tip of the upper pouch is completely amputated rather than just slit to create a good full-thickness opening, which may reduce stricture rates.
Clinical
A bucket handle of tissue may be left on the upper pouch to provide a grasping point during suturing without injuring the tracheal wall.
Clinical
The anastomosis is performed with a single layer of 5-0 PDS sutures on a TF needle, with the back wall sewn first starting with a middle stitch.
Clinical
Large full-thickness bites including all layers are taken during anastomosis.
Clinical
The entire anastomosis takes place in approximately a 2 square centimeter area.
Clinical
When the gap is minimal, all knots are tied intracorporeally; for longer gaps, extracorporeal ties with a knot pusher allow watching the ends come together to ensure no tearing.
Clinical
The back row of anastomotic sutures is placed intraluminally, typically consisting of 3 or 4 sutures.
Clinical
Approximately 80% of surgeons can acquire the skill set to perform thoracoscopic TEF repair.
Opinion
All surgeons in the speaker's practice perform thoracoscopic TEF repair after going through a training process.
Clinical
Almost all surgeons can perform thoracoscopic TEF repair, though perhaps not to the highest technical level; the challenge is implementing training in an institution for a procedure that is not electively scheduled and does not occur frequently.
Opinion
Training surgeons to perform thoracoscopic TEF repair requires commitment from experienced surgeons to operate with those learning, with very few contraindications to the approach except possibly patients on oscillators or with severe cardiac issues.
Clinical
Three junior faculty members were trained to perform thoracoscopic TEF repair over approximately 3 years.
Clinical
An NG tube is placed down about one-third of the way into the anastomosis as an internal stent to allow placement of the front row of sutures without closing off the lumen.
Clinical
Five knots are thrown when using PDS suture for the anastomosis.
Clinical
5-0 Vicryl can be used instead of PDS for the anastomosis and may be easier to teach.
Clinical
PDS is preferred over Vicryl because it does not become wet and limp, maintains a more rigid tip for easier grasping in small spaces, and is a monofilament that does not soften as much as braided Vicryl.
Opinion
NG tubes are no longer routinely left postoperatively based on discussion in the Midwest Consortium study, unless there is concern about anastomotic integrity requiring a stent.
Clinical
Contrast studies are still performed on day 4 before starting feeds in the speaker's practice.
Clinical
At 6-7 months postoperatively, thoracoscopic TEF repair results in three small 3-4 mm incisions with no chest wall deformity or musculoskeletal problems.
Clinical
In the speaker's personal series, the leak rate is 3.5-4%, with no leaks requiring reoperation.
Clinical
There has been one recurrent fistula in the speaker's series.
Clinical
The stricture rate for Type C repairs is 14%, defined as strictures requiring intervention such as dilation.
Clinical
The stricture rate in long-gap repairs is approximately 50%.
Clinical
About 25% of patients undergoing thoracoscopic TEF repair eventually require fundoplication, with the rate being approximately 50% in pure esophageal atresia cases.
Clinical
Only two aortopexies have been required in the speaker's series of thoracoscopic TEF repairs.
Clinical
Chest drains are no longer routinely placed after thoracoscopic TEF repair if the repair is good and there are no concerns, based on experience from Great Ormond Street Hospital where contrast studies are not obtained, patients are fed on day 2, and chest drains are never left.
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