Correlation of Intravascular Injection Rate and Severity of Cervical Neural Foraminal Stenosis

2019 ◽  
Author(s):  
Keyword(s):  
Injection Rate ◽  
Foraminal Stenosis ◽  
Intravascular Injection

Comparison of Touhy and Quincke needles on intravascular injection rate in lumbar transforaminal epidural block: a randomized prospective trial

2021 ◽  
pp. rapm-2021-102504
Author(s):  
Hyojung Soh ◽  
Yujin Jeong ◽  
Eung Don Kim
Keyword(s):  
Steroid Injection ◽  
Prospective Trial ◽  
Injection Rate ◽  
Epidural Steroid Injection ◽  
Tuohy Needle ◽  
Spinal Cord Infarction ◽  
Procedure Time ◽  
Intravascular Injection ◽  
Transforaminal Epidural Steroid Injection ◽  
Epidural Steroid

BackgroundTransforaminal epidural steroid injection is widely used in clinical practice to effectively deliver injectate into the ventral epidural space. Complications associated with intravascular injection such as spinal cord infarction and paraplegia can occur during transforaminal epidural steroid injection. To improve the safety of the procedure, avoidance of intravascular injection is crucial, for which appropriate needle selection is important. The primary aim of this study was to compare intravascular injection rates during transforaminal epidural steroid injection between commonly used Quincke and Tuohy needles.MethodTwo hundred and four transforaminal epidural steroid injection cases were randomly assigned to one of two needle groups (22-gage Quincke needle or 22-gage Tuohy needle). Intravascular injection was evaluated using digital subtraction angiography. Spread of contrast medium to the ventral and medial epidural spaces was evaluated. Procedure time was compared between the two needle types.ResultsThe overall incidence of intravascular injection was 7.8%. The rate of intravascular injection was significantly lower in the Tuohy needle group than the Quincke needle group (2.9% vs 12.7%, p=0.009). The ventral and medial epidural spread rates of the Tuohy needle group were 92.2% and 95.1%, respectively, significantly higher than those of the Quincke needle group. The procedure time was shorter in the Tuohy needle group than in the Quincke needle group (97.4 (19.3) seconds vs 117.8 (31.9) s; mean difference −20.40 (95% CI −34.35 to −6.45), p=0.005).ConclusionsIn conclusion, Tuohy needles had a lower intravascular injection rate and higher medial and ventral epidural spreading rates than Quincke needles.Trial registration numberKCT0002095.

scholarly journals Comparison of Intravascular Injection Rate Between Blunt and Sharp Needles During Cervical Transforaminal Epidural Block

2019 ◽  
Vol 3 (22;3) ◽  
pp. 265-270
Author(s):  
Saeyoung Kim
Keyword(s):  
Contrast Medium ◽  
Tertiary Hospital ◽  
Radicular Pain ◽  
Injection Rate ◽  
Epidural Block ◽  
Procedure Time ◽  
Intravascular Injection ◽  
Needle Position ◽  
Blunt Needle ◽  
Sharp Needle

Background: Cervical transforaminal epidural block (CTEB) is a useful option in the diagnosis and treatment of cervical radicular pain. However, inadvertent intravascular injection can lead to severe neurologic complications. Blunt needles are considered to displace instead of penetrate vessels because of their dull needle tip. Objectives: To investigate whether there is a difference between blunt and sharp needles in intravascular injection rates during CTEB. Study Design: Prospective, randomized, clinical trial. Setting: A tertiary hospital in South Korea. Methods: After institutional review board approval, 108 patients undergoing CTEB for treatment of radicular pain resulting from spinal stenosis and herniated nucleus pulposus were randomly assigned to one of 2 needle groups (blunt needle or sharp needle). The needle position was confirmed using biplanar fluoroscopy, and 2 mL of nonionic contrast medium was injected to detect intravascular injection. Intravascular injection was defined as the contrast medium spreading out through the vascular channel during injection under realtime fluoroscopy. This study was registered in ClinicalTrials.gov. Results: The intravascular injection rate was not significantly different between the blunt needle and sharp needle groups (35.2% vs. 33.3%, P > 0.05). The procedure time was longer in the blunt needle group than in the sharp needle group (101.00 ± 12.4 seconds vs. 56.67 ± 8.3 seconds, P < 0.001). Limitations: This was a single-center study. Additionally, the physicians could not be blinded to the type of needle used. Conclusions: In the present study, use of a blunt needle did not reduce the rate of intravascular injection during CTEB compared to use of a sharp needle. In addition, procedure time significantly increased with blunt needle use compared to sharp needle use. Key words: Analgesia, bleeding, blunt needle, cervical spine, clinical trials, complications, intravascular injection, radiculopathy, sharp needle, transforaminal epidural block

Permeability of Endometrial Blood Vessels to Exogenous Horse Radish Peroxidase in Mice. Electron Microscope Study

1973 ◽  
Vol 31 ◽  
pp. 562-563
Author(s):  
M.C. Castillo-Jessen ◽  
A. González-Angulo
Keyword(s):  
Electron Microscopy ◽  
Blood Vessels ◽  
Electron Microscope Study ◽  
Ultrastructural Level ◽  
Low Molecular Weight ◽  
Horse Radish Peroxidase ◽  
Intravascular Injection ◽  
Normal Morphology ◽  
Functional Implications ◽  
Low Molecular Weight Proteins

Information regarding the normal morphology of uterine blood vessels at ultrastructural level in mammals is scarce Electron microscopy studies dealing with endometrial vasculature despite the functional implications due to hormone priming are not available. Light microscopy observations with combined injection of dyes and microradiography along with histochemical studies does not enable us to know the detailed fine structure of the possible various types of blood vessels in this tissue. The present work has been designed to characterize the blood vessels of endometrium of mice as well as the behavior of the endothelium to injection of low molecular weight proteins during the normal estrous cycle in this animal. One hundred and forty female albino mice were sacrificed after intravascular injection of horse radish peroxidase (HRP) at 30 seconds, 5, 15, 30 and 60 minutes.

PULMONARY TALCOSIS: A Foreign body granulomatous lung disease

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Olufisayo Otusanya
Keyword(s):  
Foreign Body ◽  
Lung Biopsy ◽  
Granulomatous Disease ◽  
Mycobacterial Disease ◽  
Intravascular Injection ◽  
Radiological Findings ◽  
Atypical Mycobacterium ◽  
Mycobacterium Infection ◽  
Granulomatous Lung Disease ◽  
High Index Of Suspicion

Pulmonary Talcosis is a rare foreign body granulomatous disease that occurs as a result of exposure to talc either by inhalation of talc particles or via intravascular injection of talc containing medications. Pulmonary Talcosis is often misdiagnosed as pulmonary tuberculosis, atypical mycobacterium infection or sarcoidosis as many of their clinical and radiological findings overlap. We report a case of talcosis mimicking mycobacterial disease which was eventually diagnosed via lung biopsy. A detailed history and high index of suspicion is required for timely diagnosis and appropriate management.

Determination of Optimum Parameters for Anaerobic Thermophilic Bacterium Injection using Commercial Simulator: Core Flooding Validation and Sensitivity

2020 ◽  
Author(s):  
A. Koto
Keyword(s):  
Oil Recovery ◽  
Simulation Experiment ◽  
Previous Experiment ◽  
Core Sample ◽  
Thermophilic Bacterium ◽  
Injection Rate ◽  
Core Flooding ◽  
Optimum Parameters ◽  
Result Show

The objective of this paper is to determine the optimum anaerobic-thermophilic bacterium injection (Microbial Enhanced Oil Recovery) parameters using commercial simulator from core flooding experiments. From the previous experiment in the laboratory, Petrotoga sp AR80 microbe and yeast extract has been injected into core sample. The result show that the experiment with the treated microbe flooding has produced more oil than the experiment that treated by brine flooding. Moreover, this microbe classified into anaerobic thermophilic bacterium due to its ability to live in 80 degC and without oxygen. So, to find the optimum parameter that affect this microbe, the simulation experiment has been conducted. The simulator that is used is CMG – STAR 2015.10. There are five scenarios that have been made to forecast the performance of microbial flooding. Each of this scenario focus on the injection rate and shut in periods. In terms of the result, the best scenario on this research can yield an oil recovery up to 55.7%.

CALCULATION OF OPTIMAL INJECTION RATE FOR DISPERSED WATERFLOODING SYSTEM

2017 ◽  
pp. 63-67
Author(s):  
L. A. Vaganov ◽  
A. Yu. Sencov ◽  
A. A. Ankudinov ◽  
N. S. Polyakova
Keyword(s):  
Injection Rate ◽  
Oil Field ◽  
Injection Well ◽  
Water Migration ◽  
Mutual Location ◽  
Optimal Injection ◽  
Technical Measures ◽  
Injection Rates

The article presents a description of the settlement method of necessary injection rates calculation, which is depended on the injected water migration into the surrounding wells and their mutual location. On the basis of the settlement method the targeted program of geological and technical measures for regulating the work of the injection well stock was created and implemented by the example of the BV7 formation of the Uzhno-Vyintoiskoe oil field.

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