Data from: Fluoroscopy-guided catheter tip positioning optimization: 10–30 mm beyond landmarks is associated with reduced intrathoracic central venous stenosis risk in hemodialysis patients
Data files
Aug 03, 2026 version files 24.54 KB
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README.md
10.33 KB
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tip_in_ra.csv
7.80 KB
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tip_in_svc_lower.csv
4.80 KB
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tip_in_svc_upper.csv
1.60 KB
Abstract
This study examined how dialysis catheters are positioned using fluoroscopy guidance. Researchers found that the standard fluoroscopy method often places the catheter tip too high, increasing risks of vein blockages. By comparing X-rays with more precise imaging, digital subtraction angiography (DSA), they determined the catheter should be placed 10–30 mm lower than usual. This adjustment significantly reduced complications. The results suggest a simple change to improve catheter placement safety for dialysis patients.
Description of the data and file structure
The dataset contains clinical and imaging data of hemodialysis patients with central venous catheter (CVC) placement, to analyze the correlation between catheter tip position and central venous stenosis risk.
The dataset contains 3 worksheets, each corresponding to a different catheter tip position group:
File: tip_in_svc_upper.csv
Description: Dataset of patients with catheter tip located in the upper segment of the superior vena cava (SVC)
File: tip_in_svc_lower.csv
Description: Dataset of patients with catheter tip located in the lower segment of the superior vena cava (SVC)
File: tip_in_ra.csv
Description: Dataset of patients with catheter tip located in the right atrium (RA)
Variables across all files:
| Column Name | Description | Abbreviation Explanation | Unit |
|---|---|---|---|
| Number | Unique patient identifier | - | - |
| sex | Patient gender | M=Male, F=Female | - |
| age | Patient age | - | years |
| Etiology of renal failure | Underlying cause of renal failure | HTN=Hypertension, DM=Diabetes Mellitus, DCM=Dilated Cardiomyopathy, PKD=Polycystic Kidney Disease, AD=Aortic Dissection, Gout=Gout, CKD=Chronic Kidney Disease, RCC=Renal Cell Carcinoma, Bladder Ca=Bladder Cancer, SLE=Systemic Lupus Erythematosus | - |
| Number of CVC placements | Total number of CVC placements | CVC=Central Venous Catheter | times |
| reason | Indication for CVC placement | 1=blood flow decrease, 2=Facial/extremity edema/Varicose veins, 3=Infection or other | - |
| BMI | Body Mass Index | Calculated as weight(kg)/(height(m))² | kg/m² |
| Systolic pressure | Systolic blood pressure | - | mmHg |
| Diastolic pressure | Diastolic blood pressure | - | mmHg |
| Hemodialysis Duration (month) | Total duration of hemodialysis | - | month |
| Total duration of CVC catheterization (month) | Total cumulative duration of CVC indwelling | - | month |
| Indwelling time of current in-situ CVC (month) | Indwelling time of the current CVC | - | month |
| Peres’ formula | Peres' formula for catheter tip position calculation | Calculated as height(cm)/10 | mm |
| a vertical distance -the fluoroscopy-defined CAJ | Vertical distance from catheter tip to cavoatrial junction | CAJ=Cavoatrial Junction | mm |
| Tracheal Carina (mm) | Distance from catheter tip to tracheal carina | - | mm |
| CAJ-Intercostal Space | Intercostal space where CAJ is located | t4=4th intercostal space, t5=5th intercostal space, t6=6th intercostal space, t7=7th intercostal space | - |
| The right sternoclavicular joint-the right internal jugular vein | Distance from right sternoclavicular joint to right internal jugular vein | - | mm |
| Superior margin of the right sternoclavicular joint-CAJ | Distance from superior margin of right sternoclavicular joint to CAJ | - | mm |
| DSA-CVT | Digital subtraction angiography findings of central venous thrombosis | DSA=Digital Subtraction Angiography, CVT=Central Venous Thrombosis | - |
| DSA-CVT (right innominate vein1, SVC 2,RA 3) | Location of central venous thrombosis | 1=right innominate vein, 2=superior vena cava, 3=right atrium | - |
Data Format
- The revised dataset is provided in the following format:
Comma-Separated Values files (.csv) for each worksheet, fully compatible with downstream analysis tools
Human subjects data
This retrospective study was approved by the Ethics Committee of Wuhan Central Hospital (No. WHZXKYL2025-094) and conducted in accordance with the principles of the Declaration of Helsinki. The ethics committee waived informed consent due to the retrospective nature and anonymized data.