ClinicalTrials.gg
Status unknownNCT04489875Updated Jul 30, 2020

Gum Chewing Reduces the Risk of Postoperative Ileus After Arthroplasty Procedures in The Elderly Population

An interventional study of Chewing Gum in Paralytic Ileus, sponsored by Indus Hospital and Health Network. Status unknown. Open to participants aged 50 Years to 70 Years. Per ClinicalTrials.gov, last updated 2020-07-30.

Sponsored by Indus Hospital and Health Network · Not applicable, Interventional, and Prevention

The sponsor has not verified this record recently (last verified Jul 2020), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
50
Allocation
Randomized
Ages
50 Years to 70 Years
Sex
All
01

Study summary

Postoperative ileus (POI) is defined as a temporary cessation of bowel movement after a surgical procedure. Surgical procedures not only include abdominal or colorectal procedures but non-abdominal procedures as well. Cessation of bowel movement not only leads to disturbing constipation but also may lead to nausea, loss of appetite, and food intolerance. These patients tend to have more pain scores and dissatisfaction with the surgical management and team. The mechanism behind this condition is caused by a decrease in vagal parasympathetic stimulation. To break/prevent this mechanism, here comes the "sham feeding" (gum-chewing) effect where an increase in chewing and saliva enhances the gastric emptying and overall motility of gut as a cephalic phase of digestion even in non-gastro or colorectal surgeries. This effect is studied thoroughly in gastric, colorectal, and gynecological procedures. There is scarcity about its effect following orthopedic procedures specifically hip arthroplasty. The objective of this study is to assess the effect of adding gum-chewing to the conventional postoperative feeding regimen on restoring postoperative bowel function and length of stay in hospital of patients undergoing elective hip arthroplasty.

Interventions:

Behavioral intervention (Chewing gum) will be started the morning after surgery when the patient is fully awake and allowed to start taking an oral diet (which usually starts within 6-10 hours after surgery). In addition to the conventional postoperative feeding schedule, the patient will be given the gum to chew for at least 15 minutes each time, 3 times/day before the usual time of the meal, until the first flatus. The control group will have a conventional feeding schedule without chewing gum being added to their meals.

Hypothesis:

The investigators hypothesize that there is an association between gum chewing and the relief from postoperative ileus in hip arthroplasty patients.

Study Design:

Single-center, open-label, parallel design, superiority randomized-controlled trial with 2 treatment arms. The primary outcome will be the time interval in hours from the end of surgery until the passage of flatus, which is reported subjectively by the patient. The secondary outcome will be the time interval in hours from the end of surgery until the passage of stool. The other secondary outcome will be the postoperative hospital stay in days (surgery to discharge).

Read the detailed description

Study Enrollment Procedures Enrollment will be a continuous process with screening and enrolling eligible patients admitted through the clinic electively for primary THR. Informed consent will be taken from the patient as per routine protocol before the arthroplasty procedures in the hospital. Research objectives, methodology, risks, and benefits will be explained in detail. Consent for the participation in the study will only be taken by the primary investigator at his clinic or the surgical resident on call preoperatively along with the consent for the surgical procedure.

Pre-Randomization Evaluations Screening The screening will involve the routine history taking and physical examination by the doctor and nursing staff in the clinic. Screening won't involve performing procedures that are not part of routine management. Special attention will be given on assessing the dental history and whether the patient is able to chew gum.

On-study/on-intervention evaluations After screening and eligibility, patients will be randomly allocated by a 1:1 ratio to the gum-chewing (gum) or control (no gum) groups using a computer-generated randomization sequence by the clinical trials unit (CTU), which they will provide to the PI, after patients' admission in the hospital. Patients will be followed from the time they reach the ward after surgery until their hospital discharge, which is usually around 7 days.

Data Collection:

Training of data collectors will be done by the PI to ensure the reliability and validity of the study. Data collectors will be recruited, preferably nurses or residents familiar with the hospital information management system (HIMS), the medical records and the CTU protocols. Training of data collectors will be done, and collectors will be strictly instructed to respect the autonomy of participants. Data collection will be done by the data collectors under the supervision of the PI and CTU. Questionnaires will be checked for consistency and logical data entries. Data entry will be done, and counter checked by the PI at regular intervals.

Data Storage:

Data collected will be coded and kept confidential without the identifiable information of patients. The confidentiality of the study participants will be maintained throughout the study period. Data collected will be kept confidential without identifiable information of patients who are identified by a number assigned. The hard copy forms will be retained in a secured location with the PI after data entry into computer software and will be kept as per hospital protocol. The password-protected drives will be used to store data with only the PI having access to it. The data will be available for AKU ethical review committee on request and might be published in a journal without disclosing any identifiable information of patients. Filled questionnaires will be stored for 5 years after the study is completed as per the policy of the institute.

Sample Size:

To the best of author's knowledge, this is the first research to study the effect of the gum-chewing post-arthroplasty procedure on time to flatus. Literature reported numerous studies on the same objective but only on post abdominal and colorectal surgery patients which gave minimum mean time to flatus post-surgery of 67 hours [3]. In arthroplasty, no handling of abdominal viscera is done, and the investigators assume the time of bowel return to function is considerably less. Hence, considering the rarity of previous literature and the number of cases to be operated in 6 months, investigators decided to recruit and study all the eligible patients during the study period from July 2020 to December 2020. The expected number of patients will be of 50 patients in each arm.

Plan of Analysis:

Statistical analysis will be done by using STATA software version 15. Mean ± SD will be computed for all the normally distributed quantitative variables. The median and interquartile range would be reported for the non-normally distributed quantitative variables. The categorical variables would be expressed in frequencies and percentages. Length of stay will be calculated by Kaplan-Meier analysis, with an unadjusted comparison of groups by mantel-cox log-rank test. Risk ratios for the time-to-become ileus free and time-to-discharge from the hospital will be calculated by cox proportional hazard regression model, considering the following independent variables: age, gender, operation type, diabetes mellitus, preoperative cardiovascular disease (ischemia /heart failure/dysrhythmias), PCA opiate use and presence/absence of chewing gum.

02

Conditions studied

  • Paralytic Ileus

Keywords

  • Hip Arthroplasty
  • Chewing gum
  • Sham Feeding
03

In context

Intestinal Pseudo-Obstruction

26 studies on the registry are indexed under Intestinal Pseudo-Obstruction; 6 are open to participants now.

This study's planned enrollment of 50 is below the median of 60 across 18 interventional studies indexed under Intestinal Pseudo-Obstruction.

Browse Intestinal Pseudo-Obstruction studies →

Lead sponsor

Indus Hospital and Health Network is the lead sponsor of 20 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
50 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Adult patients aged 50-70 years
  • Undergoing elective primary hip arthroplasty surgery
  • I, II, and III
  • The patients undergoing general anesthesia with/without neuraxial anesthesia

Exclusion criteria

Exclusion Criteria:

  • Patients refusing to consent
  • Patients already having an established nasogastric (NG) tube/gastrostomy feeding, or unsafe/unable to swallow due to any neurological condition
  • Patients with documented bowel disease other than peptic ulcers
  • History of chronic constipation more than 3 days before surgery
  • Inability to chew gum due to dental issues
  • traumatic and revision cases of arthroplasty
  • adjuvant surgical procedures (abdominal, thoracic, etc.) besides the primary arthroplasty procedure will also be excluded from the study.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ASA physical status

The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.

05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
50 participants (estimated)

Study arms

  • Experimental
    Chewing gum

    the patients in this arm will receive the post-operative oral feeding along with chewing gum which they'll be required to chew for at least 15 minutes before their meal 3 times a day

    Behavioral: Chewing Gum

  • No intervention
    No chewing gum

    The patients in this arm will only receive the post-operative oral feeding

Interventions

  • BehavioralChewing Gum

    The intervention would be chewing gum. The patients in the intervention arm would be asked to chew gum for 15 minutes before meals thrice a day.

06

What researchers measure

Primary outcomes

  1. Passage of Flatus

    the time interval in hours from the end of surgery until the first passage of flatus, which is reported subjectively by the patient. Patients will be instructed to make note of the time when flatus is passed for the first time after surgery.

    Time frame: up to 12 hours post-operatively

Secondary outcomes

  1. passage of stool

    the time interval in hours from the end of surgery until the first passage of stool, which is reported subjectively by the patient. Patients and the bedside nurse will be instructed to make note of the time when the stool is passed for the first time after surgery.

    Time frame: up to 24 hours post-operatively

07

Study locations

No study locations are listed for this record.

08

References and documents

Publications

  • Kalyanwat as, jakhar m, jain s. Postoperative ileus: a study on the role of chewing gum to reduce its duration. Saudi surgical journal. 2018 jul 1;6(3):85.
  • Begum s, shahzad n, murtaza g, rehman zu, hasnain zafar gc. Of post-operative ileus after colorectal surgeries: a randomized control trial. Clinics of sugery. 2018; 1 (1): 1-5. Age (years). 2018;55(13.5):51-9.
  • Matros E, Rocha F, Zinner M, Wang J, Ashley S, Breen E, Soybel D, Shoji B, Burgess A, Bleday R, Kuntz R, Whang E. Does gum chewing ameliorate postoperative ileus? Results of a prospective, randomized, placebo-controlled trial. J Am Coll Surg. 2006 May;202(5):773-8. doi: 10.1016/j.jamcollsurg.2006.02.009. PubMed 16648017 ↗
  • van den Heijkant TC, Costes LM, van der Lee DG, Aerts B, Osinga-de Jong M, Rutten HR, Hulsewe KW, de Jonge WJ, Buurman WA, Luyer MD. Randomized clinical trial of the effect of gum chewing on postoperative ileus and inflammation in colorectal surgery. Br J Surg. 2015 Feb;102(3):202-11. doi: 10.1002/bjs.9691. Epub 2014 Dec 18. PubMed 25524125 ↗
  • Atkinson C, Penfold CM, Ness AR, Longman RJ, Thomas SJ, Hollingworth W, Kandiyali R, Leary SD, Lewis SJ. Randomized clinical trial of postoperative chewing gum versus standard care after colorectal resection. Br J Surg. 2016 Jul;103(8):962-70. doi: 10.1002/bjs.10194. Epub 2016 May 5. PubMed 27146793 ↗
  • Karmali S, Jenkins N, Sciusco A, John J, Haddad F, Ackland GL; POM-X Study Investigators. Randomized controlled trial of vagal modulation by sham feeding in elective non-gastrointestinal (orthopaedic) surgery. Br J Anaesth. 2015 Nov;115(5):727-35. doi: 10.1093/bja/aev283. Epub 2015 Aug 30. PubMed 26323293 ↗
  • Asao T, Kuwano H, Nakamura J, Morinaga N, Hirayama I, Ide M. Gum chewing enhances early recovery from postoperative ileus after laparoscopic colectomy. J Am Coll Surg. 2002 Jul;195(1):30-2. doi: 10.1016/s1072-7515(02)01179-1. PubMed 12113542 ↗
  • Noble EJ, Harris R, Hosie KB, Thomas S, Lewis SJ. Gum chewing reduces postoperative ileus? A systematic review and meta-analysis. Int J Surg. 2009 Apr;7(2):100-5. doi: 10.1016/j.ijsu.2009.01.006. Epub 2009 Jan 31. PubMed 19261555 ↗
  • Hasan O, Mazhar L, Jiwani A, Begum D, Lakdawala R, Noordin S. Gum Chewing, Added to Conventional Feeding, Reduces Risk of Post-Operative Ileus after Elective Hip and Knee Arthroplasty Procedures in Elderly Population: A Protocol for a Parallel Design, Open-Label, Randomized Controlled Trial. Int J Surg Protoc. 2021 Aug 9;25(1):165-170. doi: 10.29337/ijsp.158. eCollection 2021. PubMed 34435165 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 30, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04489875
Lead sponsor
Indus Hospital and Health Network
Collaborators
Aga Khan University
Responsible party
Ahsun Jiwani (Junior Biostatistician, Indus Hospital and Health Network) — Principal investigator
First posted
Jul 28, 2020
Start date
Sep 2020 (estimated)
Primary completion
Jun 2021 (estimated)
Completion
Sep 2021 (estimated)
Last update
Jul 30, 2020

Study contacts

Shahryar Noordin, MBBS
Contact
shahryar.noordin@aku.edu
+922134864350 ext. 4350
Dilshad Begum
Contact
dilshad.begum@aku.edu
+922134862303 ext. 2303
Obada Hassan, MSc. Epibio
principal investigator · Aga Khan University

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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