scholarly journals Epidural pressure waveforms

Anaesthesia ◽  
2017 ◽  
Vol 72 (10) ◽  
pp. 1284-1285
Author(s):  
C. L. Gwinnutt
Keyword(s):  
Epidural Pressure

Some principles of postoperative epidural pressure monitoring

1981 ◽  
Vol 55 (3-4) ◽  
pp. 227-245 ◽  
Author(s):  
M. Belopavlovic ◽  
A. Buchthal ◽  
J. W. F. Beks ◽  
H. L. Journée
Keyword(s):  
Pressure Monitoring ◽  
Epidural Pressure

A New Miniaturized System for Monitoring the Epidural Pressure in Children and Adults

1977 ◽  
Vol 8 (01) ◽  
pp. 21-28 ◽  
Author(s):  
K. Dietrich ◽  
M. Gaab ◽  
O. Knoblich ◽  
J. Schupp ◽  
B. Ott
Keyword(s):  
Epidural Pressure

Some pressure and fluid dynamic characteristics of the canine epidural space

1977 ◽  
Vol 232 (3) ◽  
pp. H255-H259
Author(s):  
R. G. Bengis ◽  
A. C. Guyton
Keyword(s):  
Epidural Space ◽  
Fluid Dynamic ◽  
Fluid Pressure ◽  
Simultaneous Recording ◽  
Positive Pressure ◽  
Pressure Curve ◽  
Epidural Pressure ◽  
Volume Depletion ◽  
Significant Drop ◽  
Epidural Catheters

Pressure measured in teh epidural space of 50 dogs was consistently negative (subatmospheric). Acutely implanted epidural catheters gave an average reading of -2.72 mmHg (n = 44, SE = 0.18), whereas chronically implanted catheters gave more negative readings, averaging -5.8 mmHg (n = 6, SE = 0.49). Since the chronically implanted catheters permit healing, resolution of hemorrhage, and resealing of the epidural space to take place, resulting in equilibration of microcirulatory forces, these readings are believed to represent more closely the true epidural pressure. Also these results approximate closely the calculated and measured interstitial fluid pressures obtained by different techniques in other loose areolar connective tissue systems. Compliance studies, using a double-lumen catheter for simultaneous recording and infusing in the epidural space, showed increasing compliance as the pressure rose into the positive pressure range, with an eventual plateau of the volume-pressure curve at the level of the concomitantly measured cerebrospinal fluid pressure (avg = +5.73 mmHg, n = 10, SE = 0.48). Intravenous volume loading using Tyrode solution caused a large rise in epidural pressure, and volume depletion with diuretics caused a significant drop in epidural pressure.

scholarly journals Comparison of Epidural Pressure Decrease Pattern According to Different Lumbar Epidural Approaches

2020 ◽  
Vol 2;23 (4;2) ◽  
pp. E202-E210
Author(s):  
Jihee Hong
Keyword(s):  
Epidural Space ◽  
Management Practice ◽  
Epidural Injection ◽  
Epidural Pressure ◽  
Abrupt Decrease ◽  
Interspinous Ligament ◽  
Pressure Decrease ◽  
Significant Difference ◽  
Key Words Epidural ◽  
Midline Approach

Background: During lumbar epidural injection (LEI) using a midline approach, we might encounter failure of identifying the epidural space owing to an equivocal or absent loss of resistance (LOR) sensation. The reason for such absence of LOR sensation has been suggested as paucity of midline ligamentum flavum, paravertebral muscle, and cyst in the interspinous ligament of the lumbar spine. Despite its low specificity, LOR is the most commonly used method to identify the epidural space. Objectives: The purpose of this study was to analyze lumbar epidural pressure decrease patterns and identify factors contributing to this pressure decrease. Study Design: Prospective randomized trial. Setting: An interventional pain management practice in South Korea. Methods: This prospective study included 104 patients receiving LEI due to lumbar radiculopathy. A midline or paramedian approach of LEI was determined with randomization. Among various factors, gender, age, body mass index (BMI), and diagnosis were analyzed using a subgroup that included 60 cases of only a paramedian approach. Results: Grades I, II (abrupt decrease), and III (gradual decrease) were found as patterns of epidural pressure decrease. Abrupt pressure decrease was more frequently observed in the paramedian group (P < 0.001). Age, gender, BMI, and diagnosis did not show any significant difference in frequencies between abrupt and gradual pressure decrease. Limitations: We could not match LOR sensation with epidural pressure decrease shown in the monitor. Conclusions: This study demonstrates that abrupt pressure decrease occurs more frequently with the paramedian approach. However, age, gender, BMI, or diagnosis did not affect the incidence of epidural pressure decrease. Key words: Epidural, paramedian, midline, pressure decrease

An Indwelling Epidural Pressure Sensor with Integrated Circuits for Biotelemetry

1983 ◽  
pp. 90-94
Author(s):  
M. Furuse ◽  
M. Hasuo ◽  
H. Kuchiwaki ◽  
A. Ikeyama ◽  
H. Inagaki ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Pressure Sensor ◽  
Epidural Pressure

Development of a Fully Implantable Epidural Pressure (EDP) Sensor

1989 ◽  
pp. 48-51
Author(s):  
T. Ohta ◽  
H. Miyake ◽  
M. Yamashita ◽  
S. Tsuzawa ◽  
H. Tanabe ◽  
...  
Keyword(s):  
Epidural Pressure

The Effects of the Amount of Fluid Used in Epiduroscopic Laser Neural Discectomy Procedures on Intraocular Pressure and an Evaluation of the Ocular Findings

Pain Medicine ◽  
2020 ◽  
Vol 21 (7) ◽  
pp. 1357-1361
Author(s):  
Serbülent Gökhan Beyaz ◽  
Ali Metin Ülgen ◽  
Burçin Çakir
Keyword(s):  
Intraocular Pressure ◽  
Macular Thickness ◽  
Optic Disk ◽  
Increased Intracranial Pressure ◽  
Epidural Pressure ◽  
Fiber Layer ◽  
Hospital System ◽  
Rnfl Thickness ◽  
Ocular Findings ◽  
Significant Difference

Abstract Introduction During epiduroscopic laser neural discectomy (ELNP) procedures, the amount of fluid used in the epidural area may cause increased intracranial pressure. This study aimed to investigate the effect of increased epidural pressure on intraocular pressure and other ocular findings due to the amount of fluid delivered to the epidural area and the rate of delivery of the fluid. Material and Methods After obtaining approval from the Ethics Committee of Sakarya University Faculty of Medicine, patients who underwent ELNP in the Department of Anesthesiology and Reanimation Department, Algology Clinic, between January 2017 and May 2017 were included in this retrospective study. To evaluate the ocular findings after the operation, measurements obtained using an optical coherence tomography device were retrieved from the patient files and evaluated. Results Data from the medical files of 52 patients from the hospital system were evaluated. There was no significant difference between preoperative and postoperative retinal nerve fiber layer (RNFL) thickness, mean central macular thickness, optic disk area, and vertical cup-to-disk ratio (P &gt; 0.05). Conclusions Epiduroscopy procedures include intermittent or continuous infusion of saline into the epidural area. Currently, the volume of fluid that should be given to the epidural area in epiduroscopy procedures is very controversial. As a result of this study, we concluded that the amount of fluid used during ELNP, at 107.25 mL and 8.33 mL/min, had no effect on the intraocular pressure, optic disk diameter, macular thickness, or peripapillary RNFL thickness; thus, it was safe for ELNP.

scholarly journals The Usefulness of Lumbar Epidural Pressure as an Index of Intracranial Pressure

1989 ◽  
Vol 29 (6) ◽  
pp. 484-489 ◽  
Author(s):  
Shodo FUJIOKA ◽  
Motoyuki KAKU ◽  
Jun-ichiro HAMADA ◽  
Akira YOKOTA ◽  
Yukitaka USHIO
Keyword(s):  
Intracranial Pressure ◽  
Epidural Pressure
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