Endoscopic Negative Pressure Therapy After Oncological Gastrectomies

Endoscopic negative pressure therapy (ENPT):

OPD: The commercially available Eso-SPONGE® System (B. Braun Melsungen AG, Melsungen, Germany) was used for endoluminal vacuum therapy. For positioning the OPD in loop-technique a loop (MersileneTM, Polyester, 4 Ph. Eur., Ethicon®, Norderstedt, Germany) is fixed at the distal end of the drainage, gripped with an endoscopic grasper and placed under endoscopic view. Endoscopic placement took place via oral intubation of the esophagus with finally oro-nasal redirection and fixation with plasters.

OFD: The OFD for endoluminal therapy is handmade, as previously described, by wrapping a thin open-pore double-layered drainage film (Suprasorb® CNP, Drainage Film; Lohmann \& Rauscher International GmbH \& Co.KG, Rengsdorf, Germany) on the distal end of a small caliber redon drain, a gastric tube or the gastric segment of a naso-jejunal feeding tube (Freka® Trelumina, Fresenius Kabi Deutschland GmbH, Bad Homburg Germany). Sutures (MersileneTM, Polyester, 4 Ph. Eur., Ethicon®, Norderstedt, Germany) were used for the fixation of the drainage film around the tube. Drain insertion took place via nasal positioning and endoscopic guiding with grasper. Venting tubes in tri-lumen enteral feeding tubes has to be closed for ENPT.

Controlled Negative Pressure: A continuous vacuum of -125 mmHg is generated by electronic vacuum devices (KCI V.A.C. Ulta or V.A.C. Freedom; KCI USA Inc., San Antonio, TX, USA).

Procedural informations: In patients with suspected EJAL first an index endoscopy under general anesthesia with endotracheal intubation was indicated. Standard gastroscopes with outer diameter of 9.8mm were used with carbon dioxide insufflation.

Definition of a anastomotic leak were endoscopic or radiological dehiscences at the esophagojejunostomy with extravasation of fluids and gas.

Decision criteria for placement of OPD or OFD were the defect size, radiological findings and clinical situation of the patient. A CT scan in patients with suspected EJAL was done in all cases.

Re-endoscopy was performed after 3-7 days. In the case of persisting leak or in the case of uncertainty, the new ENPT system was re-inserted and treatment was continued. In patients with OPD change interval was 3-4 days, in patients treated with OFD interval was longer up to 7 days. Success was defined as complete closure of the perforation.

In patients with a good clinical situation with endoluminale placed OFD swallow of liquids is allowed.

Database:

An analysis was performed using SPSS v. 24.0.0.1 (IBM, Armonk, NY, USA). Data were presented as means ± SD.

Results Eight patients (4 females and 4 males with a mean age of 61.39 ± 12.92 years) were treated with ENPT for EJL. Patient's characteristics are presented in Table 2.

Mean time point of diagnosis the EJAL was day 6.25 ± 2.54 after resection. Three patients were treated at the ICU at the time of diagnosis of the EJAL. Symptoms that caused suspicion of EJAL were respiratory insufficiency, conspicuous secretion via drains, fever, and elevated inflammatory markers. All patients were treated and observed on ICU after detection an start of ENPT.

Findings of the index endoscopy varied strongly. Circumscribed insufficiencies, large leakages with secretion of putrid fluids or fibrin coated anastomosis with exposed clamps were seen. In Figure 1 and 2 examples of endoscopic finding during the index endoscopy are presented.

First treatment mode in all patients with EJAL was endoluminale ENPT. In five patients ENPT was performed with OPD and in three patients with OFD. In one obese patient with a complete anastomotic avulsion ENPT was changed to SEMS-therapy. Treatment characteristics are summarized in Table 3.

In order to achieve sepsis control additional surgery was indicated in seven of eight patients. Number of needed re-operations varied strongly.

Enteral feeding was established in all patients. Enteral feeding was ensured by nutrition tubes combined with ENPT through OFD in five patients and via needle catheter jejunostomy in three patients.

In seven patients treated with ENPT for EJAL therapy combined with surgery for sepsis control was successful. In five final endoscopic reports any dehiscences or insufficiencies were characterized and in two reports small and clean insufficiencies with good wound granulation were described.

A later endoscopic intervention of a post-treatment stenosis of the anastomosis was not detected in the analyzed patients.

Conclusion ENPT is a promising tool for treating EJAL. Furthermore, comparative studies between ENPT and other endoscopic treatment options for EJAL are needed to determine the best management options and indications for combined surgical interventions.

We recommend ENPT in endoluminal position in patients who suffered from EJAL combined with additional surgery if required to treat pleural or abdominal septic collections.