Related Experiment Video
Updated: Dec 18, 2025

Improving High Viscosity Extrusion of Microcrystals for Time-resolved Serial Femtosecond Crystallography at X-ray Lasers
Published on: February 28, 2019
The relationship between the tympanostomy tube extrusion time and viscosity
Nazan Degirmenci1, Selahattin Tugrul1, Seda Sezen Goktas2
1Bezmialem Vakif University, Department of Otorhinolaryngology and Head and Neck Surgery, Istanbul, Turkey.
Objective:
The purpose of the study was to assess the correlation between the tympanostomy tube extrusion time and the viscosity of the middle ear fluid.
Methods:
Thirty-three patients who were scheduled for a tympanostomy tube (TT) insertion were included in the study. During the paracentesis procedure, fluid from the middle ear was obtained, and the viscosity was measured with a viscometer. Patients with effusion values below and above the median viscosity value of 439 cP (cP) were assigned to Group 1 and Group 2, respectively. After the surgery, the patients were followed up monthly until the tubes were observed to be extruded.
Results:
The analysis of the correlation between the tube extrusion time and the viscosity was statistically insignificant (p > 0.05). The mean tube extrusion time of Group 1 (12.65 ± 4.152 months) was slightly lower than that of Group 2 (13.81 ± 4.43 months); however, the difference was not statistically significant.
Conclusion:
The tube extrusion time can be longer or shorter and is independent of the effusion viscosity. Further studies are needed to clarify the factors that affect the TT extrusion time.
Trial Registration Number:
NCT03848026.
More Related Videos
10:36Prescribed 3-D Direct Writing of Suspended Micron/Sub-micron Scale Fiber Structures via a Robotic Dispensing System
Published on: June 12, 2015
06:24Author Spotlight: Advancements in the Fabrication of Synthetic Vocal Fold Models for Phonetic and Robotic Applications
Published on: January 5, 2024
Related Concept Videos
Viscosity
The SI unit of viscosity is...
Viscosity of Fluid
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Design Example: Deciding Thickness of Lubricating Fluid in a Shaft
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular velocity...
Setting Time of Cement
Deriving the Speed of Sound in a Liquid
The speed of sound in fluids can be derived by considering a mechanical wave...