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Clinical analysis of the rap stress stimulator applied for crus fracture after skeletal external fixation.

Zhuang P, Hong J, Chen W, Wu J, Ding Z - Arch Med Sci (2015)

Bottom Line: One hundred and sixty-five patients (183 limbs) who suffered from open tibia and fibula fracture received skeletal external fixation, of which 108 limbs were treated with the rap stress stimulator after external fixation and 75 limbs were treated with regular functional exercises of muscle contraction and joint activity only.Then the fracture healing time and rate of nonunion were compared between the two groups.The rap stress stimulator significantly shortened the fracture healing time and reduced the rate of nonunion for treating open tibia and fibula fractures.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, the 175 Hospital of PLA, Orthopaedic Center of PLA, Southeast Hospital of Xiamen University, Zhangzhou, China.

ABSTRACT

Introduction: Open crus fracture is still difficult in clinical treatment because of the delayed fracture union and high rate of nonunion after the operation. A consensus has been reached that mechanical stress can promote fracture healing. We independently developed a stress stimulator, which can provide longitudinal pressure for the fixed fracture end of the lower legs to promote fracture healing. The purpose of this study is to explore the advantages and clinical effect of the rap stress stimulator applied for open crus fracture after skeletal external fixation.

Material and methods: One hundred and sixty-five patients (183 limbs) who suffered from open tibia and fibula fracture received skeletal external fixation, of which 108 limbs were treated with the rap stress stimulator after external fixation and 75 limbs were treated with regular functional exercises of muscle contraction and joint activity only. Then the fracture healing time and rate of nonunion were compared between the two groups.

Results: The mean fracture healing time and rate of nonunion in the group treated with the rap stress stimulator were 138.27 ±4.45 days and 3.70% respectively, compared to 153.43 ±4.89 days and 10.67% in the group treated without the stimulator.

Conclusions: The rap stress stimulator significantly shortened the fracture healing time and reduced the rate of nonunion for treating open tibia and fibula fractures.

No MeSH data available.


Related in: MedlinePlus

The rap stress stimulator is showna – Control panel, b – hammer, c – bracket, d – remote control, e – power switch, f – controlling button of strength of hammer acting force, g – controlling button of frequency of hammer acting force.
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Figure 0001: The rap stress stimulator is showna – Control panel, b – hammer, c – bracket, d – remote control, e – power switch, f – controlling button of strength of hammer acting force, g – controlling button of frequency of hammer acting force.

Mentions: The self-developed rap stress stimulator (patent number: CN803117.5) is composed of a shell, horizontal-trench bracket, hammer, and control plane for driving the electric motor. The hammer rapped the heel to produce an intermittent rap force, causing the micromovement of the fracture end and generating the pressure. The control plane regulates the rap frequency and strength with a range of 0.1–10 Hz and 20 Newtons (N) – 350 N respectively (Figure 1).


Clinical analysis of the rap stress stimulator applied for crus fracture after skeletal external fixation.

Zhuang P, Hong J, Chen W, Wu J, Ding Z - Arch Med Sci (2015)

The rap stress stimulator is showna – Control panel, b – hammer, c – bracket, d – remote control, e – power switch, f – controlling button of strength of hammer acting force, g – controlling button of frequency of hammer acting force.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495157&req=5

Figure 0001: The rap stress stimulator is showna – Control panel, b – hammer, c – bracket, d – remote control, e – power switch, f – controlling button of strength of hammer acting force, g – controlling button of frequency of hammer acting force.
Mentions: The self-developed rap stress stimulator (patent number: CN803117.5) is composed of a shell, horizontal-trench bracket, hammer, and control plane for driving the electric motor. The hammer rapped the heel to produce an intermittent rap force, causing the micromovement of the fracture end and generating the pressure. The control plane regulates the rap frequency and strength with a range of 0.1–10 Hz and 20 Newtons (N) – 350 N respectively (Figure 1).

Bottom Line: One hundred and sixty-five patients (183 limbs) who suffered from open tibia and fibula fracture received skeletal external fixation, of which 108 limbs were treated with the rap stress stimulator after external fixation and 75 limbs were treated with regular functional exercises of muscle contraction and joint activity only.Then the fracture healing time and rate of nonunion were compared between the two groups.The rap stress stimulator significantly shortened the fracture healing time and reduced the rate of nonunion for treating open tibia and fibula fractures.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, the 175 Hospital of PLA, Orthopaedic Center of PLA, Southeast Hospital of Xiamen University, Zhangzhou, China.

ABSTRACT

Introduction: Open crus fracture is still difficult in clinical treatment because of the delayed fracture union and high rate of nonunion after the operation. A consensus has been reached that mechanical stress can promote fracture healing. We independently developed a stress stimulator, which can provide longitudinal pressure for the fixed fracture end of the lower legs to promote fracture healing. The purpose of this study is to explore the advantages and clinical effect of the rap stress stimulator applied for open crus fracture after skeletal external fixation.

Material and methods: One hundred and sixty-five patients (183 limbs) who suffered from open tibia and fibula fracture received skeletal external fixation, of which 108 limbs were treated with the rap stress stimulator after external fixation and 75 limbs were treated with regular functional exercises of muscle contraction and joint activity only. Then the fracture healing time and rate of nonunion were compared between the two groups.

Results: The mean fracture healing time and rate of nonunion in the group treated with the rap stress stimulator were 138.27 ±4.45 days and 3.70% respectively, compared to 153.43 ±4.89 days and 10.67% in the group treated without the stimulator.

Conclusions: The rap stress stimulator significantly shortened the fracture healing time and reduced the rate of nonunion for treating open tibia and fibula fractures.

No MeSH data available.


Related in: MedlinePlus