Free-Falling Hammer (TBI Model Instrument)
The Free-Fall Hammer strikes animals in the way of free-fall of heavy objects. This equipment is mainly used to make the model of brain and spinal cord injury in small animals.
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- Introduction
- Features
- More Recommendations
Introduction
Free-Falling Hammer adopts the Allen’s weight-drop method. A free-falling weight strikes an firing pin, transmitting energy to a targeted anatomical site to establish injury model. The injury mechanism closely mimics clinical mechanical trauma, with a precisely definable impact site and controllable force.Free-Falling Hammer has a high cost performance, and is widely used in the model design of spinal cord injury(SCI) and traumatic brain injury (TBI) in small animals.
Features
Large impact coverage:Impact sleeve is fixed on bracket and can move freely in three-dimensional space. By adjusting the bracket, the impact sleeve can be aligned with the impact area.
Large impact strength range:Maximum impact height is 26 cm, and there are many specifications for weights and firing pins to meet different experimental needs.
Height does not need to be measured:The impact sleeve comes with scales and pins, so it is unnecessary to measure the impact height manually, which reduces the manual measurement error.
Sturdy and durable material:The impact sleeve is made of aluminum alloy with wear-resistant coating. The bracket and firing pin are made of stainless steel, which is corrosion-resistant and easy to clean.
This method was later applied to the construction of various brain injury and spinal cord injury models. These models usually need to expose a specific area of the brain or spinal cord through surgery, and use a brain stereotactic instrument to locate the hit area. Then, choose the appropriate firing pin, weight and impact height to realize a more stable damage model.
YAN-D-032: Free-falling hammer + Standard base
YAN-D-034: Free-falling hammer + Base of brain stereotaxic instrument (including AP axis)
YAN-D-036: Free-falling hammer + Base of brain stereotaxic instrument (including AP axis, adapter and ear bars of rats)
Large impact strength range:Maximum impact height is 26 cm, and there are many specifications for weights and firing pins to meet different experimental needs.
Height does not need to be measured:The impact sleeve comes with scales and pins, so it is unnecessary to measure the impact height manually, which reduces the manual measurement error.
Sturdy and durable material:The impact sleeve is made of aluminum alloy with wear-resistant coating. The bracket and firing pin are made of stainless steel, which is corrosion-resistant and easy to clean.
Technical Principles
Apply and measure the impact energy according to the principle of free fall. The weight falls vertically from a certain height in the impact sleeve and strikes the firing pin, thus giving measurable impact energy to a specific area. The impact energy is measured by the weight's mass and falling height.This method was later applied to the construction of various brain injury and spinal cord injury models. These models usually need to expose a specific area of the brain or spinal cord through surgery, and use a brain stereotactic instrument to locate the hit area. Then, choose the appropriate firing pin, weight and impact height to realize a more stable damage model.
Composition
Impact sleeve and Bracket
Weights
Firing pins
Brain Injury Recommendation
YAN-D-030 does not contain a base, and it can be assembled with brain stereotaxic instrument. The other three models include the base, details are as follows.
YAN-D-032
YAN-D-034
YAN-D-036
YAN-D-032: Free-falling hammer + Standard base
YAN-D-034: Free-falling hammer + Base of brain stereotaxic instrument (including AP axis)
YAN-D-036: Free-falling hammer + Base of brain stereotaxic instrument (including AP axis, adapter and ear bars of rats)
Spinal Cord Injury Recommendation
In addition to the recommendations of brain injury, spinal cord fixator (YAN-3110) is needed to fix the spinal cord of animals.
YAN-D-032
YAN-3110
Specifications
| Parameter | Specification |
|---|---|
| Horizontal adjustment range | 0-20 cm |
| Height adjustment range | 0-20 cm |
| Impact sleeve length | 30 cm |
| Impact sleeve diameter | 16 mm |
| Weight height adjustment | 1-26 cm |
| Firing pin tip diameter | 4.5 mm, 3.0 mm, 1.2 mm (Select one as needed) |
| Weights | 40 g, 20 g (Support for customization) |
