Gastric Volume After Drinking 175 ml of Ice Water Prior to Gastroscopy in Healthy Adult Patients

Gastric Emptying and Gastric Volume After Ingestion of 175 ml of Ice Water Prior to Elective Gastroscopy in Healthy Adults

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05685446

Enrollment

Registered

2023-01-17

Start date

2020-03-03

Completion date

2021-06-17

Last updated

2023-01-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Fasting, Perioperative Pulmonary Aspiration

Keywords

Gastroscopy, Gastric volume, Anaesthesia

Brief summary

Recommendation for fluid fasting is two hours prior to anaesthesia, however, less may be acceptable. The current study compares ingestion of 175 ml ice water prior to elective gastroscopy vs. standard fasting on gastric residual volume.

Detailed description

Recommendations regarding fasting requirements prior to general anaesthesia is two hours for fluids. Recent research indicates that reduced fluid fasting time may be acceptable. The current study aimed to compare ingestion of 175 ml ice water 15 minutes prior to procedure compared to standardized fasting regimen on residual gastric volumes in patients receiving elective gastroscopy, as these volumes may have implications for fasting requirements.

Interventions

OTHERIce water

Ingestion of 175 ml iced tap water 15 minutes prior to elective gastroscopy

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* Scheduled for elective gastroscopy in a medical outpatient clinic * American Society of Anesthesiologists physical status classification system category (ASA score) I or II * Age 18 years or above

Exclusion criteria

* Any increased risk of aspiration, eg. dysphagia, previous aspiration, non-fasting status, or known alcohol abuse * Suspected delayed gastric emptying, eg. regular opioid use within three days * Enteral pre-medication required * Any structural gastric or esophageal diseases

Design outcomes

Primary

Measure	Time frame	Description
Gastric residual volume	15 minutes	Aspired residual gastric fluid volume at start of gastroscopy

Secondary

Measure	Time frame	Description
Nausea and dyspepsia	15 minutes	Proportion of patients reporting nausea or dyspeptic symptoms prior to gastroscopy

Countries

Denmark

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026