{"id":{"repo_id":"auckland-ms","oai_identifier":"oai:researchspace.auckland.ac.nz:2292/48874"},"canonical_url":"https://search.dev.ndltd.org/etd/auckland-ms/oai:researchspace.auckland.ac.nz:2292/48874","repository":{"repo_id":"auckland-ms","name":"University of Auckland","base_url":"https://researchspace.auckland.ac.nz/server/oai/request"},"display":{"title":"Long Range Wireless Power Transfer for Application in Chronic Hydrocephalus Monitoring","abstract":"Long-range wireless power transfer has the potential to serve as a platform for energising long-term medical implants. Current implementations of wireless power transfer require deliberate patient action to deliver power. Long-range wireless power transfer can supply power reliably and deliver it from a distance hence reducing the need for patient interaction. Chronic hydrocephalus is a condition where patients suffer a build-up of excessive cerebrospinal fluid in the brain. This is commonly treated with the installation of a drainage shunt to drain this excess fluid. These shunts have high levels of failure with 50% of all shunts having failed within 2 years after deployment. The issue for patients is that symptoms of shunt failure are non-specific. The issue for clinicians is that methods for diagnosing failure require exposing the patient to ionizing radiation or are surgical in nature. A proposed implant deployed alongside these shunts to measure the pressure within the brain would be of great clinical value for both parties. This device would have to last the lifetime of the patient. Batteries which are commonly used to power implants have a finite supply of energy and replacement of the implant would require surgery. A long-range wireless power system is not constrained in the same manner and can supply energy so long as the device can receive it. The purpose of this thesis is the quantification of the performance of this wireless power system and the challenges and effects associated with implantation of the system. A proof-of-concept device was built and powered using this system to demonstrate its ability to deliver sufficient power to a circuit to perform pressure measurements and transmit them wirelessly to an external device. The effects of encapsulation and implantation on the wireless power transfer system were studied and quantified. A combination of simulation work and physical experiments using phantoms as substitutes for human tissue was done. Considering the results obtained, the wireless power transfer system was shown to transfer sufficient power to collect several measurements of high fidelity pressure data each day. For the patient, it is the promise of a reliable measurement with can accurately detect shunt failure. For the clinician, this device promises collection of pressure data which can be used to study the long-term progression of hydrocephalus.","abstract_html":"Long-range wireless power transfer has the potential to serve as a platform for energising long-term medical implants. Current implementations of wireless power transfer require deliberate patient action to deliver power. Long-range wireless power transfer can supply power reliably and deliver it from a distance hence reducing the need for patient interaction. Chronic hydrocephalus is a condition where patients suffer a build-up of excessive cerebrospinal fluid in the brain. This is commonly treated with the installation of a drainage shunt to drain this excess fluid. These shunts have high levels of failure with 50% of all shunts having failed within 2 years after deployment. The issue for patients is that symptoms of shunt failure are non-specific. The issue for clinicians is that methods for diagnosing failure require exposing the patient to ionizing radiation or are surgical in nature. A proposed implant deployed alongside these shunts to measure the pressure within the brain would be of great clinical value for both parties. This device would have to last the lifetime of the patient. Batteries which are commonly used to power implants have a finite supply of energy and replacement of the implant would require surgery. A long-range wireless power system is not constrained in the same manner and can supply energy so long as the device can receive it. The purpose of this thesis is the quantification of the performance of this wireless power system and the challenges and effects associated with implantation of the system. A proof-of-concept device was built and powered using this system to demonstrate its ability to deliver sufficient power to a circuit to perform pressure measurements and transmit them wirelessly to an external device. The effects of encapsulation and implantation on the wireless power transfer system were studied and quantified. A combination of simulation work and physical experiments using phantoms as substitutes for human tissue was done. Considering the results obtained, the wireless power transfer system was shown to transfer sufficient power to collect several measurements of high fidelity pressure data each day. For the patient, it is the promise of a reliable measurement with can accurately detect shunt failure. For the clinician, this device promises collection of pressure data which can be used to study the long-term progression of hydrocephalus.","abstract_has_math":false,"creators":["Tan, Perry"],"institution":"ResearchSpace@Auckland","degree_name":"PhD","degree_level":"Doctoral","degree_discipline":"Bioengineering","degree_department":null,"school":null,"contributors":[],"advisors":["Budgett, D","McCormick, D","Leung, A"],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019","date_published":"2019","updated_at":"2026-07-24T01:05:30Z","subjects":[],"languages":[],"rights":["Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher."],"rights_urls":["https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2292/48874","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Budgett, D","McCormick, D","Leung, A"]},{"key":"dc:creator","label":"Author","values":["Tan, Perry"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-11-06T22:55:28Z"]},{"key":"dc:date.issued","label":"Date","values":["2019"]},{"key":"dc:publisher","label":"Institution","values":["ResearchSpace@Auckland"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["UoA99265207413702091"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Bioengineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["PhD"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["The University of Auckland"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. 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This is commonly treated with the installation of a drainage shunt to drain this excess fluid. These shunts have high levels of failure with 50% of all shunts having failed within 2 years after deployment. The issue for patients is that symptoms of shunt failure are non-specific. The issue for clinicians is that methods for diagnosing failure require exposing the patient to ionizing radiation or are surgical in nature. A proposed implant deployed alongside these shunts to measure the pressure within the brain would be of great clinical value for both parties. This device would have to last the lifetime of the patient. Batteries which are commonly used to power implants have a finite supply of energy and replacement of the implant would require surgery. A long-range wireless power system is not constrained in the same manner and can supply energy so long as the device can receive it. The purpose of this thesis is the quantification of the performance of this wireless power system and the challenges and effects associated with implantation of the system. A proof-of-concept device was built and powered using this system to demonstrate its ability to deliver sufficient power to a circuit to perform pressure measurements and transmit them wirelessly to an external device. The effects of encapsulation and implantation on the wireless power transfer system were studied and quantified. A combination of simulation work and physical experiments using phantoms as substitutes for human tissue was done. Considering the results obtained, the wireless power transfer system was shown to transfer sufficient power to collect several measurements of high fidelity pressure data each day. For the patient, it is the promise of a reliable measurement with can accurately detect shunt failure. For the clinician, this device promises collection of pressure data which can be used to study the long-term progression of hydrocephalus."]},{"key":"dc:title","label":"Title","values":["Long Range Wireless Power Transfer for Application in Chronic Hydrocephalus Monitoring"]}]}],"canonical_facts":{"dc:contributor.advisor":["Budgett, D","McCormick, D","Leung, A"],"dc:creator":["Tan, Perry"],"dc:date.accessioned":["2019-11-06T22:55:28Z"],"dc:date.issued":["2019"],"dc:description.abstract":["Long-range wireless power transfer has the potential to serve as a platform for energising long-term medical implants. Current implementations of wireless power transfer require deliberate patient action to deliver power. Long-range wireless power transfer can supply power reliably and deliver it from a distance hence reducing the need for patient interaction. Chronic hydrocephalus is a condition where patients suffer a build-up of excessive cerebrospinal fluid in the brain. This is commonly treated with the installation of a drainage shunt to drain this excess fluid. These shunts have high levels of failure with 50% of all shunts having failed within 2 years after deployment. The issue for patients is that symptoms of shunt failure are non-specific. The issue for clinicians is that methods for diagnosing failure require exposing the patient to ionizing radiation or are surgical in nature. A proposed implant deployed alongside these shunts to measure the pressure within the brain would be of great clinical value for both parties. This device would have to last the lifetime of the patient. Batteries which are commonly used to power implants have a finite supply of energy and replacement of the implant would require surgery. A long-range wireless power system is not constrained in the same manner and can supply energy so long as the device can receive it. The purpose of this thesis is the quantification of the performance of this wireless power system and the challenges and effects associated with implantation of the system. A proof-of-concept device was built and powered using this system to demonstrate its ability to deliver sufficient power to a circuit to perform pressure measurements and transmit them wirelessly to an external device. The effects of encapsulation and implantation on the wireless power transfer system were studied and quantified. A combination of simulation work and physical experiments using phantoms as substitutes for human tissue was done. Considering the results obtained, the wireless power transfer system was shown to transfer sufficient power to collect several measurements of high fidelity pressure data each day. For the patient, it is the promise of a reliable measurement with can accurately detect shunt failure. For the clinician, this device promises collection of pressure data which can be used to study the long-term progression of hydrocephalus."],"dc:identifier.uri":["https://hdl.handle.net/2292/48874"],"dc:publisher":["ResearchSpace@Auckland"],"dc:relation.isreferencedby":["UoA99265207413702091"],"dc:rights":["Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher."],"dc:rights.uri":["https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm"],"dc:title":["Long Range Wireless Power Transfer for Application in Chronic Hydrocephalus Monitoring"],"dc:type":["Thesis"],"thesis:degree_discipline":["Bioengineering"],"thesis:degree_level":["Doctoral"],"thesis:degree_name":["PhD"],"thesis:institution_name":["The University of Auckland"]},"updated_at":"2026-07-24T01:05:30Z"}