Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound MidlineNCT07248683
Application of Intermittent Training in Radial Artery Puncture and Catheterization Skills Under Ultrasound-Guided Line Guidance
A study testing Intermittent Retraining and Non-interval retraining in people with Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound Midline, run by General Hospital of Ningxia Medical University.
Trial summary
This study aims to investigate medical students' mastery of radial artery puncture and catheterization skills guided by the midline on ultrasound when using scenario simulation combined with intermittent training, and to compare this approach with traditional teaching methods. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound Midline
- What is being tested?
- Intermittent Retraining and Non-interval retraining
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 30 participants
- Where
- No sites listed yet
- Study dates
- 20 Nov 2025to 28 Feb 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Inclusion and Exclusion Criteria for Study Participants (Resident Trainees) I. Inclusion Criteria Identity and Qualifications: Resident physicians undergoing standardized training in this department.
Training Stage: Resident physicians who have not yet independently performed ultrasound-guided radial artery puncture and catheterization procedures.
Willingness to Learn: Voluntary participation in this "Ultrasound-Guided Radial Artery Catheterization" training program with full understanding of the research content.
Informed Consent: Have signed a written informed consent form agreeing to participate in this study and comply with protocol requirements.
Basic Requirements: Possess good hand-eye coordination and learning ability, capable of cooperating to complete the entire training course and data collection.
II. Exclusion Criteria Prior Experience: Residents who have previously independently completed more than 5 cases or have systematically studied ultrasound-guided radial artery puncture and catheterization techniques.
Skill Level: Residents who achieved a high pre-test performance score or demonstrated consistent success in performing ultrasound-guided radial artery catheterization prior to the study.
Cognitive or Motor Impairment: Residents with severe cognitive dysfunction, motor impairment, or a history of psychiatric disorders that may compromise training efficacy assessment.
Time Commitment and Compliance: Individuals unable to guarantee completion of the prescribed training program, practical exercises, and follow-up evaluations.
Other Conditions: Participants deemed unsuitable for this study by the investigator due to other reasons (e.g., rotation schedule conflicts, inability to coordinate personal time, etc.).
Inclusion and Exclusion Criteria for Study Subjects (Patients Undergoing Radial Artery Catheterization)
- Inclusion Criteria
Age: Generally ≥18 years old. Clinical Indications: Patients requiring invasive arterial pressure monitoring via radial artery puncture and catheterization due to surgical procedures, critical condition monitoring, or blood gas analysis.
Vascular Criteria: Palpable radial artery pulse on the puncture side, negative modified Allen test (or adequate ulnar artery compensation as determined by current guidelines).
Informed Consent: Patient or authorized family member fully understands the study purpose and procedures, and has signed a written informed consent form.
Cooperation Capacity: Able to cooperate throughout the radial artery puncture and catheterization procedure.
II. Exclusion Criteria Contraindications for Puncture: History of thrombosis, aneurysm, or arteriovenous fistula at the puncture site; skin infection, laceration, burn, or severe scar tissue at the puncture site.
Circulatory Impairment: Severe shock, hypovolemic state, or anticipated difficulty with radial artery puncture.
Coagulation Abnormalities: Significant bleeding tendency, marked thrombocytopenia, or ongoing anticoagulant/antiplatelet therapy without discontinuation.
Abnormal vascular anatomy: Preliminary ultrasound assessment indicates severe tortuosity, malformation, excessively narrow diameter, or other significant anatomical variations in the radial artery that may compromise puncture success or safety.
Special circumstances: Requirement for simultaneous bilateral radial artery catheterization; or other situations deemed unsuitable for this teaching procedure by the investigator.
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Application of Ultrasound-Guided Midline Combined With Spaced Retrieval Training in Radial Artery Puncture and Catheterization for Standardized-Trained Residents：A Randomized Sequential Allocation Study
This study aims to investigate medical students' mastery of radial artery puncture and catheterization skills guided by the midline on ultrasound when using scenario simulation combined with intermittent training, and to compare this approach with traditional teaching methods.
Read the detailed description
With the continuous advancement of modern anesthesiology and critical care medicine, arterial monitoring has become an integral part of clinical anesthesia management. During anesthesia, functions such as arterial blood pressure monitoring and arterial blood gas analysis enable real-time surveillance of vital signs, playing a crucial role particularly in the anesthesia management and postoperative monitoring of high-risk patients. The radial artery, being a superficial and easily accessible vessel, has become one of the commonly used arterial puncture sites in clinical practice. Furthermore, this technique is a mandatory skill for residents in standardized training programs within anesthesiology departments. However, as an invasive procedure, it demands high proficiency from the operator and carries significant risks of complications such as infection, hematoma, thrombosis, and arterial spasm. Radial artery catheterization poses a challenge for residents, making it essential to establish a straightforward and clear teaching strategy.The success rate of ultrasound-guided radial artery puncture is influenced by operator experience, particularly among resident physicians. Although ultrasound with a "midline" feature can assist in puncture, catheter placement remains challenging, and the effectiveness of their mastery requires further study. Current training programs exhibit gaps, with clinical settings predominantly relying on intensive learning sessions that yield poor skill retention. Interval learning, despite its advantages, is underutilized. Given the clinical workload constraints of residents, sustained practice after intensive training is challenging. Therefore, designing and implementing an intermittent training program for ultrasound-guided radial artery catheterization is highly significant. This approach aims to combine the strengths of both intensive and intermittent training to enhance residents' skills, reduce complications, ensure patient safety, and provide departments with a new, effective training method.
- Conditions
- Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound Midline
- Being tested
- Intermittent Retraining, Non-interval retraining
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Intermittent RetrainingOther
Through basic skills training and testing, it was confirmed that all trainees had mastered the procedural steps for radial artery puncture and catheterization guided by ultrasound midline imaging. Testing also validated the students' proficiency in performing this procedure. The intermittent retraining group underwent repeated training at fixed intervals, performing the same tasks daily on days 3, 7, and 14.
Non-interval retrainingOther
Through basic skills training and testing, it was confirmed that all trainees had mastered the procedural steps for radial artery puncture and catheterization guided by ultrasound midline imaging. Testing also validated the students' proficiency in performing this procedure. The non-intermittent retraining group did not repeat the same tasks.
| Study group | Role | What they receive |
|---|---|---|
| Interval Training Group | Experimental | All participants underwent centralized training. The intermittent retraining group performed fixed-interval repeated training, executing the same tasks daily on days 3, 7, and 14. Receives: Other: Intermittent Retraining |
| Non-interval retraining | Experimental | Through centralized training, it was confirmed that all trainees had mastered the steps of radial artery puncture and catheterization guided by the midline ultrasound. A test validated the students' proficiency in this procedure. The non-intermittent retraining group will not undergo intermittent training during the following week. Receives: Other: Non-interval retraining |
What is being measured
The primary outcome is the main question the study is designed to answer.
First Attempt Catheterization Success Rate
The percentage of cases where the operator successfully punctures the target vessel (specifically the radial artery in my study) on the first attempt and advances the catheter to the desired position. This process requires no additional puncture attempts, catheter adjustments, or encounters procedural failure (such as unsuccessful vessel entry, guidewire/catheter entanglement, abnormal positioning, or immediate complications like hematoma formation).
Measured: The fourteenth day after the unified training
First-Attempt Radial Artery Catheterization Success Rate
First-Attempt Success Rate of Radial Artery Catheterization Guided by Ultrasound Median Line
Measured: The 14th day after training
Incidence of complications
Incidence of Complications in Radial Artery Puncture and Catheterization Guided by Ultrasound Midline
Measured: The 14th day after training
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Nov 2025
- Study start20 Nov 2025 (estimated)
- Primary completion28 Feb 2026 (estimated)
- Study completion28 Feb 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound MidlineStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 30 participants (estimated)
Sponsor and investigators
- Lead sponsor
- General Hospital of Ningxia Medical University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07248683
- Sponsor's protocol ID
- Haoyao Ren--2025-11
- Status last verified
- Aug 2025
- First submitted
- 18 Nov 2025
- Last updated
- 25 Nov 2025
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 25 Nov 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Application of Ultrasound-Guided Midline Combined With Spaced Retrieval Training in Radial Artery Puncture and Catheterization for Standardized-Trained Residents：A Randomized Sequential Allocation Study
- ClinicalTrials.gov ID
- NCT07248683
- Acronym / sponsor ID
- Haoyao Ren--2025-11
- Conditions
- Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound Midline
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 30 participants (estimated)
- Lead sponsor
- General Hospital of Ningxia Medical UniversityUniversity, hospital or other
- Study start
- 20 Nov 2025 (estimated)
- Primary completion
- 28 Feb 2026 (estimated)
- Study completion
- 28 Feb 2026 (estimated)
- First posted
- 25 Nov 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to investigate medical students' mastery of radial artery puncture and catheterization skills guided by the midline on ultrasound when using scenario simulation combined with intermittent training, and to compare this approach with traditional teaching methods.
Detailed description
With the continuous advancement of modern anesthesiology and critical care medicine, arterial monitoring has become an integral part of clinical anesthesia management. During anesthesia, functions such as arterial blood pressure monitoring and arterial blood gas analysis enable real-time surveillance of vital signs, playing a crucial role particularly in the anesthesia management and postoperative monitoring of high-risk patients. The radial artery, being a superficial and easily accessible vessel, has become one of the commonly used arterial puncture sites in clinical practice. Furthermore, this technique is a mandatory skill for residents in standardized training programs within anesthesiology departments. However, as an invasive procedure, it demands high proficiency from the operator and carries significant risks of complications such as infection, hematoma, thrombosis, and arterial spasm. Radial artery catheterization poses a challenge for residents, making it essential to establish a straightforward and clear teaching strategy.The success rate of ultrasound-guided radial artery puncture is influenced by operator experience, particularly among resident physicians. Although ultrasound with a "midline" feature can assist in puncture, catheter placement remains challenging, and the effectiveness of their mastery requires further study. Current training programs exhibit gaps, with clinical settings predominantly relying on intensive learning sessions that yield poor skill retention. Interval learning, despite its advantages, is underutilized. Given the clinical workload constraints of residents, sustained practice after intensive training is challenging. Therefore, designing and implementing an intermittent training program for ultrasound-guided radial artery catheterization is highly significant. This approach aims to combine the strengths of both intensive and intermittent training to enhance residents' skills, reduce complications, ensure patient safety, and provide departments with a new, effective training method.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Interval Training Group | Experimental | Other: Intermittent RetrainingAll participants underwent centralized training. The intermittent retraining group performed fixed-interval repeated training, executing the same tasks daily on days 3, 7, and 14. |
| Non-interval retraining | Experimental | Other: Non-interval retrainingThrough centralized training, it was confirmed that all trainees had mastered the steps of radial artery puncture and catheterization guided by the midline ultrasound. A test validated the students' proficiency in this procedure. The non-intermittent retraining group will not undergo intermittent training during the following week. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Intermittent RetrainingThrough basic skills training and testing, it was confirmed that all trainees had mastered the procedural steps for radial artery puncture and catheterization guided by ultrasound midline imaging. Testing also validated the students' proficiency in performing this procedure. The intermittent retraining group underwent repeated training at fixed intervals, performing the same tasks daily on days 3, 7, and 14. | Other | Interval Training Group |
| Non-interval retrainingThrough basic skills training and testing, it was confirmed that all trainees had mastered the procedural steps for radial artery puncture and catheterization guided by ultrasound midline imaging. Testing also validated the students' proficiency in performing this procedure. The non-intermittent retraining group did not repeat the same tasks. | Other | Non-interval retraining |
Primary outcome
First Attempt Catheterization Success Rate
Time frame: The fourteenth day after the unified training
The percentage of cases where the operator successfully punctures the target vessel (specifically the radial artery in my study) on the first attempt and advances the catheter to the desired position. This process requires no additional puncture attempts, catheter adjustments, or encounters procedural failure (such as unsuccessful vessel entry, guidewire/catheter entanglement, abnormal positioning, or immediate complications like hematoma formation).
First-Attempt Radial Artery Catheterization Success Rate
Time frame: The 14th day after training
First-Attempt Success Rate of Radial Artery Catheterization Guided by Ultrasound Median Line
Incidence of complications
Time frame: The 14th day after training
Incidence of Complications in Radial Artery Puncture and Catheterization Guided by Ultrasound Midline
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 25 Nov 2025.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Questions about this trial
What is this clinical trial studying?
A study testing Intermittent Retraining and Non-interval retraining in people with Learning and Memorization of Radial Artery Puncture and Catheterization Guided by Ultrasound Midline, run by General Hospital of Ningxia Medical University.
The full registered description is in the About this study section and the official record.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 25 Nov 2025. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Zhihua Wang, PhD (86-0951-18295111380, 846522050@qq.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
First Attempt Catheterization Success Rate (time frame: The fourteenth day after the unified training). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Nov 2025.