Drop Tube
Drop Tube - Related Videos
10:56
Tube Thoracostomy
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2023
Source: Rachel Liu, BAO, MBBCh, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA Tube thoracostomy (chest tube placement) is a procedure during which a hollow tube is inserted into the thoracic cavity for drainage of fluid or air. Emergency chest tube insertion is performed for definitive treatment of tension pneumothorax, traumatic hemothorax, large-volume pleural effusions, and empyemas. Irrespective of the cause of air and fluid accumulation in the pleural space, the...
09:20
Picoinjection of Microfluidic Drops Without Metal Electrodes
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Cited by 2 •
2014
We have developed a technique for picoinjecting microfluidic drops that does not require metal electrodes. As such, devices incorporating our technique are simpler to fabricate and to use.
01:13
Excess Pressure Inside a Drop and a Bubble
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2023
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops. where γ corresponds to the surface tension. Recalling that the force per...
01:16
Uterine Tubes
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2024
The uterine or fallopian tubes function as the conduit through which oocytes travel from the ovaries to the uterus. Each fallopian tube measures approximately 10 to 13 cm long and is anatomically divided into the infundibulum, ampulla, isthmus, and interstitial part (or intramural segment). The infundibulum is characterized by its funnel shape and features extensions called fimbriae which reach towards the peritoneal cavity. These fimbriae play a critical role during ovulation as they extend...
01:24
Endotracheal Tube Extubation
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2025
Endotracheal tube extubation is a critical procedure in weaning patients from mechanical ventilation. It involves physically removing the oral or nasal endotracheal (ET) tube, marking the final step in liberating a patient from ventilatory support. Procedure Extubation removes the endotracheal tube (ETT) from the patient on mechanical ventilation. It requires a well-coordinated, multidisciplinary approach involving physicians, nurses, respiratory therapists, and other healthcare professionals.
FAQs
Gravity can move liquid through the narrow tube when the device is held for dispensing, while a bulb provides additional pressure to drive the liquid outward. Changing the dispensing force affects how quickly liquid emerges and can influence the amount delivered in each drop. Gentle, consistent pressure therefore supports more controlled addition during biological procedures.
The tube opening and the force applied during dispensing are the main factors identified for controlling drop size and delivery rate. A narrow opening helps regulate how liquid exits, while inconsistent pressure can change the amount released. Keeping the dispensing action steady helps produce more uniform drops when a procedure depends on repeatable liquid addition.
A drop tube is appropriate when a biological procedure needs small, controlled additions but does not require precise micropipette measurements. It offers a simpler way to dispense individual drops, can limit unnecessary liquid waste, and supports routine handling of solutions. Its use is therefore best suited to tasks where approximate dropwise control meets the experimental need.
Place the liquid in the tube and dispense it gradually, using gravity or controlled bulb pressure to release individual drops. The operator can regulate the addition by adjusting the dispensing force and observing the delivery rate. This approach helps add a reagent in small amounts while reducing waste, especially when exact micropipette measurement is unnecessary.
For staining, a drop tube can deliver small amounts of solution onto a biological preparation without requiring micropipette-level measurement. It can also place liquid specimens on microscope slides as individual drops. These applications make the device useful for distributing solutions or specimens in a manageable way before observation or further biological handling.
Dropwise dispensing allows users to add liquids gradually rather than releasing an uncontrolled larger volume. In biological work, that supports reagent addition, sample preparation, staining, and placement of specimens on slides. The simple design also helps reduce waste and provides practical control when the procedure requires small volumes but not the precision associated with micropipette measurements.