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Bones, blood and steel: How bioelectrical impedance analysis is affected by hip fracture and surgical implants

Ole Martin Steihaug
Ole Martin Steihaug
, 
Bård Bogen
Bård Bogen
, 
Målfrid Holen Kristoffersen
Målfrid Holen Kristoffersen
 and 
Anette Hylen Ranhoff
Anette Hylen Ranhoff
   | Jul 06, 2017
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Article Category: Articles
Published Online: Jul 06, 2017
Page range: 54 - 59
Received: Jan 14, 2017
DOI: https://doi.org/10.5617/jeb.4104
Keywords
© 2017 Ole Martin Steihaug, Bård Bogen, Målfrid Holen Kristoffersen and Anette Hylen Ranhoff, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Surgical implants used for hip fracture repair. From left: hemiarthroplasty of the hip, two cannulated screws and a compression hip screw.
Surgical implants used for hip fracture repair. From left: hemiarthroplasty of the hip, two cannulated screws and a compression hip screw.

Fig. 2

Plain film X-rays of hip fractures treated with different surgical implants. From Gjertsen (15). Reproduced with permission.
Plain film X-rays of hip fractures treated with different surgical implants. From Gjertsen (15). Reproduced with permission.

Fig. 3

Bland-Altman plot of difference in resistance between fractured and unfractured hip postoperatively after hip fracture. Red lines are the mean, upper and lower limits of agreement (mean bias ±1.96 standard deviations).
Bland-Altman plot of difference in resistance between fractured and unfractured hip postoperatively after hip fracture. Red lines are the mean, upper and lower limits of agreement (mean bias ±1.96 standard deviations).

Fig. 4

Bland-Altman plot of difference in resistance between fractured and unfractured hip 3 months after hip fracture. Red lines are the mean, upper and lower limits of agreement (mean bias ± 1.96 standard deviations).
Bland-Altman plot of difference in resistance between fractured and unfractured hip 3 months after hip fracture. Red lines are the mean, upper and lower limits of agreement (mean bias ± 1.96 standard deviations).

Fig. 5

Change in difference between fractured and unfractured hip from hospital to follow-up. Symbols indicates type of surgical implant and difference between fractured and unfractured hip in hospital. The vertical line indicates the magnitude of the change in difference between fractured and unfractured hip from hospital to follow-up.
Change in difference between fractured and unfractured hip from hospital to follow-up. Symbols indicates type of surgical implant and difference between fractured and unfractured hip in hospital. The vertical line indicates the magnitude of the change in difference between fractured and unfractured hip from hospital to follow-up.

Pairwise comparisons of BIA readings on fractured and unfractured hips.

FracturedUnfracturedP-valueN
Resistance
Hospital496(98)527(101)0.000781
Follow-up553(98)550(92)0.4134
Reactance
Hospital45(20)56(64)0.06881
Follow-up49(14)52(23)0.061134

Characteristics of the participants.

Age, years (SD)80(8)
Female, n (%)151109(76)
Right sided fracture, n (%)109(54)
Type of surgical implant, n (%)
Cannulated screws44(22)
Hemiarthroplasty62(31)
Hip compression screw83(41)
Total hip arthroplasty8(4)
Femoral nail6(3)
In hospitalAt follow-up
Height (SD), cm166(10)n=136164(9)n=162
Weight (SD), kg66(16)n=13664(14)n=162
Fractured hip
Resistance (SD), Ohm491(95)n=134555(95)n=157
Reactance (SD), Ohm46(31)n=13449(13)n=157
Unfractured hip
Resistance (SD), Ohm527(99)n =131552(89)n =158
Reactance (SD), Ohm53(51)n =13153(23)n =158
eISSN:
1891-5469
Language:
English
Publication timeframe:
Volume Open
Journal Subjects:
Engineering, Bioengineering and Biomedical Engineering, Biomedical Electronics, Life Sciences, Biophysics, Medicine, Biomedical Engineering, Physics, Spectroscopy and Metrology
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