Effects of Erector Spinae Plane Block and Paravertebral Block on Early Postoperative Pulmonary Function Test Parameters

August 23, 2026 updated by: Ozal Adiyeke, Başakşehir Çam & Sakura City Hospital

Effects of Erector Spinae Plane Block and Paravertebral Block on Early Postoperative Pulmonary Function Test Parameters in Patients Undergoing Video-assisted Thoracoscopic Surgery

The pain experienced by participants after minimally invasive chest surgery (VATS) can make it difficult for them to take deep breaths, which can lead to problems with lung function. This can cause serious problems such as lung collapse, low oxygen levels, and infections, making recovery longer and more difficult. Managing pain well after surgery is important to prevent these problems and speed up recovery. In this study, we aimed to compare two pain relief methods, Erector Spinae Plane Block (ESP) and Paravertebral Block (PVB), in participants who underwent VATS. We will look at which method causes the smallest change in lung function before and after surgery.

Study Overview

Detailed Description

Video-assisted Thoracoscopic surgery (VATS) is a minimally invasive surgical method used in the diagnosis and treatment of diseases in the chest area. Thoracoscopic surgery has many advantages, such as being less invasive, less risk of complications, shorter hospital stay, and better cosmetic results. However, these participants may experience severe pain in the postoperative period, although not as much as in surgeries performed with open surgical methods, that is, thoracotomy. This pain, which occurs in the postoperative period in VATS methods, which is one of the minimally invasive methods, may prevent the participants from taking deep breaths, as well as cause deterioration of respiratory functions, serious pulmonary complications such as atelectasis, hypoxia and infection, and prolonged postoperative patient stay. As the development of morbidity and mortality. Delay or deterioration in postoperative respiratory functions is one of the most troublesome complications of thoracic surgery. It was reported that acute pain in the postoperative period should be effectively controlled with effective analgesia methods in order to prevent postoperative pulmonary complications and accelerate the patient's well-being. Controlling pain with postoperative analgesia allows participants to breathe more deeply, perform breathing exercises more effectively, and therefore improves and helps preserve respiratory functions. Although thoracic epidural analgesia is the gold standard method in thoracic surgery, intravenous analgesic techniques and thoracic trunk nerve blocks are increasingly recommended for postoperative analgesia in less invasive VATS operations. Thoracic trunk blocks have effects on hemodynamics, respiratory functions, and consciousness; It has important advantages such as having fewer side effects than systemic analgesic techniques and being less invasive than thoracic epidural analgesia. Body blocks are recommended as a first-line analgesia program, especially in thoracic surgery, as they shorten postoperative recovery time, reduce the risk of pneumonia and provide early postoperative mobilization. The ease of application of the erector spinae plane block (ESP), its low risk of complications, and its ability to provide effective analgesia, especially in minimally invasive surgeries, have increased its use. Paravertebral block (PVB), one of the other blocks, is frequently used because it is more reliable and provides effective analgesia compared to thoracic epidural analgesia and conventional analgesia methods. Thoracic trunk plane blocks can significantly reduce intravenous opioid use and prevent side effects related to opioid use with the effective analgesia they provide in the early postoperative period, increase participants' comfort and painlessness, and accelerate recovery while preventing deterioration in respiratory function parameters. during rest and mobilization. Because; It is thought that by applying erector spinae plane block (ESP) or paravertebral block (PVB), postoperative pain scores and opioid consumption will decrease significantly and respiratory functions will return earlier. In this study, we aimed to evaluate the effects of ESP or PVB on respiratory functions in the early postoperative period in patients undergoing VATS, and in which block there would be less percentage change between preoperative and postoperative respiratory function test (PFT) parameters.

Pain is a symptom known to be subjective and will be queried with a standardized scale, the visual pain score scale (VAS), to minimize differences between participants. Postoperative rest and movement pain scores (VAS; 0, 1, 2, 4, 6, 12, 24 and pre-discharge scores), postoperative 6th hour, 12th hour and predischarge pulmonary function test (PFT) parameters, total Analgesic consumption will be recorded at 0, 1, 2, 4, 6, 12, 24 hours and before discharge.

Forced Vital Capacity (FVC), Forced Expiratory Volume in 1 Second (FEV1), FEV1/FVC, Peak Expiratory Flow (PEF) values will be recorded as Respiratory Function Test parameters.

The total narcotic analgesic needs of the participants who received the block will be recorded with the PCA device placed intravenously postoperatively and their total Morphine consumption will be recorded.

Participants' satisfaction after the procedure will be questioned with a Likert score before discharge.

Side effects such as nausea and vomiting that may occur in participants will be questioned with the simplified post-operative nausea and vomiting impact scale.

Participants' demographic characteristics, comorbidities, operation times and complications will be recorded and statistically analyzed.

Study Type

Interventional

Enrollment (Actual)

70

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Istanbul, Turkey (Türkiye)
        • Basaksehir Cam ve Sakura City Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Study Population

Participants aged 18-65 who will undergo video-assisted thorascopic surgery

Description

Inclusion Criteria:

  • Both genders
  • Being between the ages of 18 and 65
  • ASA(American Society of Anesthesiologists) I-II-III
  • Body mass index between 19 and 30kg/m2
  • Providing voluntary participation
  • Must be fully oriented and able to cooperate

Exclusion Criteria:

  • ASA(American Society of Anesthesiologists) IV-V
  • Patients who refuse to participate in the study
  • Patients under 18 years of age
  • Patients over 65 years of age
  • Presence of active infection in the area to be treated
  • Chronic pain and constant analgesic use
  • Patients with coagulation disorders
  • Patients who cannot cooperate with postoperative pain follow-ups
  • Cases taken urgently
  • Patients with severe renal failure (creatinine>2mg/dl)
  • Severe impairment of heart function (New York Heart Association Functional Classification III-IV)
  • Patients with known allergies to bupivacaine and other amide local anesthetic substances.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: ESP Group
Patients in this group received the erector spinae plane block (ESPB) as a method of postoperative pain management.
The erector spinae plane block (ESPB) was performed before the VATS procedure under ultrasound guidance for postoperative analgesia. The block was performed using a standardized technique, with local anesthetic administered into the erector spinae plane.
Active Comparator: Paravertebral Group
Patients in this group received the paravertebral block (PVB) before the VATS procedure under ultrasound guidance for postoperative analgesia.
The paravertebral block (PVB) was performed before the VATS procedure under ultrasound guidance for postoperative analgesia. The block was performed using a standardized technique.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Forced Vital Capacity(FVC)
Time Frame: Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Forced Vital Capacity (FVC) will be assessed using pulmonary function testing and reported in liters (L).
Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Change in Forced Expiratory Volume in 1 Second (FEV1)
Time Frame: Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Forced Expiratory Volume in 1 second (FEV1) will be assessed using pulmonary function testing and reported in liters (L).
Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Change in Peak Expiratory Flow (PEF)
Time Frame: Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Peak Expiratory Flow (PEF) will be assessed using pulmonary function testing and reported in liters per minute (L/min).
Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
Change in FEV1/FVC Ratio
Time Frame: Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.
The FEV1/FVC ratio will be assessed using pulmonary function testing and reported as a percentage (%).
Respiratory function tests will be performed 24 hours before surgery and at 0, 6, and 12 hours postoperatively, as well as before hospital discharge.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Total Postoperative Morphine Consumption
Time Frame: From the end of surgery to 24 hours postoperatively.
Total postoperative morphine consumption will be assessed as the cumulative dose of morphine administered during the 24-hour postoperative period and reported in milligrams (mg).
From the end of surgery to 24 hours postoperatively.
Number of Postoperative Morphine Boluses
Time Frame: From the end of surgery to 24 hours postoperatively.
The number of postoperative morphine boluses administered during the 24-hour postoperative period will be recorded and reported as the number of boluses.
From the end of surgery to 24 hours postoperatively.
Postoperative Pain at Rest
Time Frame: 0, 1, 4, 6, 12, and 24 hours after surgery.
Postoperative pain at rest will be assessed using the Visual Analog Scale (VAS) at 0, 1, 4, 6, 12, and 24 hours after surgery.
0, 1, 4, 6, 12, and 24 hours after surgery.
Postoperative Pain During Movement
Time Frame: 0, 1, 4, 6, 12, and 24 hours after surgery.
Postoperative pain during movement will be assessed using the Visual Analog Scale (VAS) at 0, 1, 4, 6, 12, and 24 hours after surgery.
0, 1, 4, 6, 12, and 24 hours after surgery.

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effectiveness on pain scores
Time Frame: 0, 1, 4, 6, 12 and 24 hours after surgery
Postoperative pain assessment is made using visual pain scoring. Participants are asked about their resting pain 0, 1, 4, 6, 12 and 24 hours after applying a postoperative peripheral nerve block. With this method, participants rate their pain with a precise numerical value from 0 to 10. While zero(0) represents "no pain"; Ten (10) represents the opposite end of the pain continuum (e.g., "The most intense pain imaginable," "As intense pain as possible," "unbearable pain").
0, 1, 4, 6, 12 and 24 hours after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 1, 2024

Primary Completion (Actual)

September 30, 2025

Study Completion (Actual)

September 30, 2025

Study Registration Dates

First Submitted

August 9, 2024

First Submitted That Met QC Criteria

September 1, 2024

First Posted (Actual)

September 4, 2024

Study Record Updates

Last Update Posted (Actual)

August 26, 2026

Last Update Submitted That Met QC Criteria

August 23, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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