Literature search strategy

Databases	Date searched	Version/files
MEDLINE (Ovid)	18/10/2022	1946 to October 17, 2022
MEDLINE In-Process (Ovid)	18/10/2022	1946 to October 17, 2022
MEDLINE Epubs ahead of print (Ovid)	18/10/2022	October 17, 2022
EMBASE (Ovid)	18/10/2022	1974 to October 17, 2022
EMBASE Conference (Ovid)	18/10/2022	1974 to October 17, 2022
Cochrane Database of Systematic Reviews – CDSR (Cochrane Library)	18/10/2022	Issue 10 of 12, October 2022
Cochrane Central Database of Controlled Trials – CENTRAL (Cochrane Library)	18/10/2022	Issue 10 of 12, October 2022
International HTA database (INAHTA)	18/10/2022	-

Trial sources searched

Websites searched

National Institute for Health and Care Excellence (NICE)
NHS England
Food and Drug Administration (FDA) - MAUDE database
Australian Safety and Efficacy Register of New Interventional Procedures – Surgical (ASERNIP – S)
Australia and New Zealand Horizon Scanning Network (ANZHSN)
General internet search

MEDLINE search strategy

The MEDLINE search strategy was translated for use in the other sources.

1 Deglutition Disorders/ 22326

2 ((Deglutition or swallow*) adj4 (difficult* or problem* or disorder*)).tw. 5801

3 dysphagia.tw. 26227

4 or/1-3 38685

5 Electric Stimulation/ 115702

6 Electric Stimulation Therapy/ 21575

7 ((electr* adj4 stimul*) or EPS).tw. 92893

8 (electrostimul* or electro-stimul* or galvanostimul* or (galvan* adj4 stimul*)).tw. 4341

9 electrotherap*.tw. 1345

10 (neurostimul* or neuro-stimul* or neuromodulat* or neuro-modulat*).tw. 18941

11 (Peripheral adj4 sens* adj4 stimul*).tw. 363

12 PES.tw. 7632

13 or/5-12 207712

14 Phagenyx*.tw. 0

15 4 and 13 423

16 14 or 15 423

17 Animals/ not Humans/ 4944921

18 16 not 17 399

Interventional procedure overview of pharyngeal electrical stimulation for neurogenic dysphagia