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Vital Signs-Integrated Patient-Assisted Intravenous Opioid Analgesia for Post Surgical Pain (VPIA)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04011163
Recruitment Status : Not yet recruiting
First Posted : July 8, 2019
Last Update Posted : November 24, 2020
Information provided by (Responsible Party):
KK Women's and Children's Hospital

Brief Summary:

To meet the unmet need of better and safer pain relief for acute pain in the post-operative setting, a Vital-signs-integrated Patient-assisted Intravenous opioid Analgesia ("VPIA") Delivery System, with novel and intelligent software algorithms and specialised hardware was developed. In the previous project, the investigators have shown that this system has the potential to increase the safety and patient satisfaction with intravenous opioid analgesia. However, opportunities to develop more robust vital signs monitoring with the goal of ensuring continual and effective analgesia are identified.

The primary aim of this proposal is to advance the development of technology (through new features and functionality) and perform clinical evaluation of the VPIA system with a larger sample size to show improvements in patient's satisfaction (pain relief) and robustness of system in terms of vital signs integration. Novel technology using adaptive vital signs controller, integrated with an infusion pump and single finger probe vital signs monitor system will be developed with the aim for commercialisation.

Condition or disease Intervention/treatment Phase
Pain Respiratory Depression Device: VPIA pump Drug: Morphine Phase 2 Phase 3

Detailed Description:

The investigators will conduct a prospective cohort study in 150 adult female subjects that undergo major surgery that require postoperative patient controlled morphine analgesia so as to examine the monitoring performance of oxygen desaturation, respiratory depression and patient satisfaction and user feedback.

Patients who are undergoing elective surgery with plan to use postoperative patient controlled analgesia with morphine will receive study information either at pre-operative assessment clinic or upon admission for surgery if they have not attended the pre-operative assessment clinic. They will be screened for eligibility using the inclusion and exclusion criteria. If eligible for recruitment, the patients will be approached by the investigators for recruitment. Upon successful recruitment of the study, patients will be asked to complete two questionnaires and rate their pre-surgical pain on the numerical rating scale in the pre-anaesthetic evaluation clinic. The general anaesthesia technique and type of analgesia administered intra-operatively will be according to standard practice and is at the discretion of the attending anaesthesiologist. After surgery, patients will be reviewed daily (up to 3 days) in the post-operative wards. They will be asked on questionnaire scoring, pain score, and analgesia information and adverse event, if any.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 150 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Vital Signs-Integrated Patient-Assisted Intravenous Opioid Analgesia for Post Surgical Pain
Estimated Study Start Date : January 31, 2021
Estimated Primary Completion Date : August 31, 2021
Estimated Study Completion Date : December 31, 2021

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: VPIA analgesia
VPIA pump will be connected to patients after surgery for up to three days. The vital signs (oxygen saturation, respiratory rate, heart rate) will be closely monitored when patients are using VPIA pump. Intravenous medication (morphine) will be given intravenously.
Device: VPIA pump
The pump is a specially designed and manufactured infusion syringe pump for intravenous analgesia. It incorporates the VPIA study regimen to meet the specific requirements of the clinical trial. It is intended to be used only for delivering drugs intravenously.
Other Name: VPIA delivery system

Drug: Morphine
Intravenous medication used is morphine diluted in normal saline to a concentration of 1mg/ml. This is a standard dilution and are routine drugs used as standard of care.
Other Name: Morphine Sulphate

Primary Outcome Measures :
  1. Incidence of a clinically significant bradypnoea [ Time Frame: Postoperative period (1 - 3 days) ]
    The number of events of respiratory rate less than 8 per minute throughout the study period (when the patient is connected to the pump)

Secondary Outcome Measures :
  1. Postoperative pain score [ Time Frame: Postoperative period (1 - 3 days) ]
    Pain scores (Numeric Rating Scale 0-10) will be asked, with zero being no pain, and 10 being the worst pain possible.

  2. Patient satisfaction [ Time Frame: Postoperative period (1 day, after the use of pump) ]
    Patient will be asked about their satisfaction level on the pump based on ordinal scale (Strongly disagree, disagree, neutral, agree, strongly agree).

  3. Changes in Hospital Anxiety and Depression Scale (HADS) score [ Time Frame: Before surgery (1 day) and postoperative period (1-3 days) ]
    HADS Anxiety and Depression score before and after surgery. HADS is commonly used by doctors to determine the levels of anxiety and depression that a patient is experiencing. Each item on the questionnaire is scored from 0-3 and this means that a person can score between 0 and 21 for either anxiety or depression. The HADS uses a scale and therefore the data returned from the HADS is ordinal. For each subscore (anxiety/depression), 0-7 = Normal; 8-10 = Borderline abnormal (borderline case); and 11-21 = Abnormal (case).

  4. EQ-5D-3L score [ Time Frame: Before surgery (1 day) ]
    EQ-5D-3L score before surgery. EQ-5D-3L is a standardized instrument for measuring generic health status. It is made up for two components; health state description and evaluation. The health status is measured in terms of five dimensions (5D); mobility, self-care, usual activities, pain/discomfort, and anxiety/depression; each dimension ranging from 1-3. From these five dimensions, EQ-5D index is calculated, having a value between 0-1. The evaluation part involves an analogue scale, asking to mark health status on the day of the interview on a 20 cm vertical scale with end points of 0 and 100. Zero corresponds to " the worst health you can imagine", and hundred corresponds to "the best health you can imagine".

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   21 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Gender Based Eligibility:   Yes
Gender Eligibility Description:   Only females undergoing gynecologic surgery in KKH will be recruited.
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • American Society of Anaesthesiologist (ASA) physical status I-III;
  • Age 21-70 years;
  • Receiving patient controlled analgesia of morphine for postoperative analgesia.

Exclusion Criteria:

  • Allergy to study drug;
  • With significant respiratory disease and obstructive sleep apnea;
  • Unwilling to place oxygen saturation and respiratory rate monitoring during study period;
  • Unable to comprehend the use of patient controlled analgesia;
  • Obstetric patients.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04011163

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Contact: Ban Leong Sng, MBBS, MMED +6563941081

Sponsors and Collaborators
KK Women's and Children's Hospital
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Principal Investigator: Ban Leong Sng, MBBS, MMED KK Women's and Children's Hospital
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Responsible Party: KK Women's and Children's Hospital Identifier: NCT04011163    
Other Study ID Numbers: NHIC-I2I-1812002
First Posted: July 8, 2019    Key Record Dates
Last Update Posted: November 24, 2020
Last Verified: November 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by KK Women's and Children's Hospital:
Postoperative pain
Respiratory depression
Infusion pump
Additional relevant MeSH terms:
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Respiratory Insufficiency
Behavioral Symptoms
Respiration Disorders
Respiratory Tract Diseases
Analgesics, Opioid
Central Nervous System Depressants
Physiological Effects of Drugs
Sensory System Agents
Peripheral Nervous System Agents