---
title: An Innovative Approach for Uniblocker Intubation
nct_id: NCT03392818
overall_status: UNKNOWN
phase: NA
sponsor: The First Hospital of Qinhuangdao
study_type: INTERVENTIONAL
primary_condition: Therapeutic Procedural Complication
countries: China
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT03392818.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT03392818"
ct_last_update_post_date: 2018-01-09
last_seen_at: "2026-05-12T06:53:04.585Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# An Innovative Approach for Uniblocker Intubation

**Official Title:** An Innovative Approach for Accurately Predicting the Optimal Insertion Depth of Uniblocker Without Fiberoptic Bronchoscope Assistance

**NCT ID:** [NCT03392818](https://clinicaltrials.gov/study/NCT03392818)

## Key Facts

- **Status:** UNKNOWN
- **Phase:** NA
- **Study Type:** INTERVENTIONAL
- **Target Enrollment:** 90
- **Lead Sponsor:** The First Hospital of Qinhuangdao
- **Conditions:** Therapeutic Procedural Complication
- **Start Date:** 2018-01-07
- **Completion Date:** 2018-06
- **CT.gov Last Update:** 2018-01-09

## Brief Summary

To measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina was calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of FOB.

## Detailed Description

In previous study, the investigators found Chest computed tomography (CT) image can accurately predicting the optimal insertion depth of Uniblocker,however in some hospital the CT scan performed for the preoperative surgical evaluation without the vocal cords slices. If a more extensive CT scan was needed for obtaining a more reliable image of the vocal cords,the additional exposure dose would be a major disadvantage of the method.So the investigators measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of FOB.

## Eligibility

- **Minimum age:** 18 Years
- **Maximum age:** 70 Years
- **Sex:** ALL
- **Healthy Volunteers:** No

```
Inclusion Criteria:

1. Adult patients undergoing left side thoracic surgery
2. The thoracic surgery requiring a Uniblocker for one-lung ventilation

Exclusion Criteria:

1. Age\>70 or \<18 years
2. ASA classifications \>III
3. BMI \>35kg/m2
4. Modified Mallampati classification ≥III
5. Thoracic surgery within the last one month
6. Severe cardiopulmonary disease
```

## Arms

- **formula** (EXPERIMENTAL) — Calculate the depth of intubation according to the formula of 0.1977\* patient's height - 4.2423
- **Fiberoptic bronchoscope** (EXPERIMENTAL) — intubation of Uniblocker under the Under the guidance of Fiberoptic bronchoscope
- **The measured distance** (EXPERIMENTAL) — To measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of FOB.

## Interventions

- **The measured distance** (OTHER) — To measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of Fiberoptic bronchoscope.
- **formula** (OTHER) — Calculate the depth of intubation according to the formula of 0.1977\* patient's height - 4.2423
- **Fiberoptic bronchoscope** (DEVICE) — The intubation of Uniblocker under the guidance of Fiberoptic bronchoscope

## Primary Outcomes

- **The intubation time** _(time frame: 1 year)_ — The intubation time defined as the time from the anesthesiologist inserted the video laryngoscope between the teeth of patients until Uniblocker at the optimal position and this was done using a stopwatch.

## Locations (1)

- The first hospital of Qinhuangdao, Qinhuangdao, Hebei, China — _RECRUITING_

## Recent Field Changes (last 30 days)

- `status.overallStatus` — added _(2026-05-12)_
- `status.primaryCompletionDate` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.phases` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `eligibility.minAge` — added _(2026-05-12)_
- `eligibility.maxAge` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `outcomes.primary` — added _(2026-05-12)_
- `armsInterventions.arms` — added _(2026-05-12)_
- `armsInterventions.interventions` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.the first hospital of qinhuangdao|qinhuangdao|hebei|china` — added _(2026-05-12)_

---

*Canonical: https://parkinsonspathways.com/agent/trials/NCT03392818.md*  
*Source data (authoritative): https://clinicaltrials.gov/study/NCT03392818*  
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