Failure of medullary tubes: A materials analysis
The objective of this study is to determine the effects of autoclaving on the stress, strain, ultimate tensile strength (UTS), fracture strain, modulus, and yield stress of nylon medullary tubes. There are three reports describing nylon medullary tube failure in the literature. All cases involved th...
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Published in | Injury Vol. 35; no. 9; pp. 878 - 882 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
01.09.2004
Elsevier |
Subjects | |
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Abstract | The objective of this study is to determine the effects of autoclaving on the stress, strain, ultimate tensile strength (UTS), fracture strain, modulus, and yield stress of nylon medullary tubes. There are three reports describing nylon medullary tube failure in the literature. All cases involved the use of nylon medullary tubes during open reduction internal fixation of fractured long bones. We demonstrated increased brittleness and decreased strength with increased exposure of medullary tubes to autoclaving, most dramatically after 100 autoclave cycles. Visual inspection of tubes is a clear indication of material degradation after repeated autoclaving. Furthermore, there is a significant difference in ultimate tensile strength (
P<0.0001) between tubes exposed to less than 100 sterilization cycles compared to tubes exposed to greater than 100 cycles. Likewise, there is a significant decrease in yield stress (
P<0.0004) between the same groups. We recommend disposal and replacement of nylon medullary tubes before they are exposed to 100 autoclaving cycles in order to avoid failure of the device. |
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AbstractList | The objective of this study is to determine the effects of autoclaving on the stress, strain, ultimate tensile strength (UTS), fracture strain, modulus, and yield stress of nylon medullary tubes. There are three reports describing nylon medullary tube failure in the literature. All cases involved the use of nylon medullary tubes during open reduction internal fixation of fractured long bones. We demonstrated increased brittleness and decreased strength with increased exposure of medullary tubes to autoclaving, most dramatically after 100 autoclave cycles. Visual inspection of tubes is a clear indication of material degradation after repeated autoclaving. Furthermore, there is a significant difference in ultimate tensile strength (P < 0.0001) between tubes exposed to less than 100 sterilization cycles compared to tubes exposed to greater than 100 cycles. Likewise, there is a significant decrease in yield stress (P < 0.0004) between the same groups. We recommend disposal and replacement of nylon medullary tubes before they are exposed to 100 autoclaving cycles in order to avoid failure of the device. The objective of this study is to determine the effects of autoclaving on the stress, strain, ultimate tensile strength (UTS), fracture strain, modulus, and yield stress of nylon medullary tubes. There are three reports describing nylon medullary tube failure in the literature. All cases involved the use of nylon medullary tubes during open reduction internal fixation of fractured long bones. We demonstrated increased brittleness and decreased strength with increased exposure of medullary tubes to autoclaving, most dramatically after 100 autoclave cycles. Visual inspection of tubes is a clear indication of material degradation after repeated autoclaving. Furthermore, there is a significant difference in ultimate tensile strength (P < 0.0001) between tubes exposed to less than 100 sterilization cycles compared to tubes exposed to greater than 100 cycles. Likewise, there is a significant decrease in yield stress (P < 0.0004) between the same groups. We recommend disposal and replacement of nylon medullary tubes before they are exposed to 100 autoclaving cycles in order to avoid failure of the device. The objective of this study is to determine the effects of autoclaving on the stress, strain, ultimate tensile strength (UTS), fracture strain, modulus, and yield stress of nylon medullary tubes. There are three reports describing nylon medullary tube failure in the literature. All cases involved the use of nylon medullary tubes during open reduction internal fixation of fractured long bones. We demonstrated increased brittleness and decreased strength with increased exposure of medullary tubes to autoclaving, most dramatically after 100 autoclave cycles. Visual inspection of tubes is a clear indication of material degradation after repeated autoclaving. Furthermore, there is a significant difference in ultimate tensile strength ( P<0.0001) between tubes exposed to less than 100 sterilization cycles compared to tubes exposed to greater than 100 cycles. Likewise, there is a significant decrease in yield stress ( P<0.0004) between the same groups. We recommend disposal and replacement of nylon medullary tubes before they are exposed to 100 autoclaving cycles in order to avoid failure of the device. |
Author | Wera, Glenn Taub, Marc Mohler, David G. Dauskardt, Reinhold H. |
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Keywords | Biomechanics Nylon Material science Trauma Medullary tubes Orthopaedic Hardware failure Tube Analysis Orthopedics Materials Anesthesia Failure Resuscitation |
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References | Vakharia, Lehto, Mohler (BIB3) 2000; 14 Ip D, Wu WC, Wong SH. Rare complication of segmental breakage of plastic medullary tube in crossed intramedullary nailing. Injury 2001;32(9):730–1. Godsiff, Heywood-Waddington (BIB2) 1993; 24 |
References_xml | – volume: 14 start-page: 514 year: 2000 end-page: 517 ident: BIB3 article-title: Multiple fracture of medullary tube during intramedullary nailing of long bone fractures publication-title: J. Orthop. Trauma contributor: fullname: Mohler – volume: 24 start-page: 136 year: 1993 end-page: 137 ident: BIB2 article-title: Closed intramedullary nailing complicated by breakage of plastic medullary tube publication-title: Injury contributor: fullname: Heywood-Waddington |
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SubjectTerms | Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy Biological and medical sciences Biomechanics Diseases of the osteoarticular system Equipment Failure Fracture Fixation - instrumentation Hardware failure Humans Material science Materials Testing Medical sciences Medullary tubes Nylon Nylons Orthopaedic Orthopedic Equipment Stress, Mechanical Trauma Traumas. Diseases due to physical agents |
Title | Failure of medullary tubes: A materials analysis |
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