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Investigation of Methods for Detecting Needle Insertion into Blood Vessels

Qaium, Ehsan (2018) Investigation of Methods for Detecting Needle Insertion into Blood Vessels. Master's Thesis, University of Pittsburgh. (Unpublished)

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Peripheral intravenous IV (pIV) placement is the mainstay for providing therapies in modern medicine. Although common, approximately 107 million difficult pIV placements each year require multiple attempts to establish IV access. Delays in establishing IV access lead to increased patient pain, delayed administration of life saving medicine, and increased cost to the institution. Current solutions involve using visual vein finders, ultrasounds and a central line if peripheral IV insertion attempts fail. The objective of this study was to investigate methods by which entry into a blood vessel could be detected, and to design and test a novel medical device that increases the likelihood of successful pIV placement on the first attempt.

Two types of measurement methods (static and transient) were investigated in this study. Static measurement involved measurements performed with a multimeter and a Wheatstone bridge. The multimeter measurement was unsuccessful due to the effect of polarization. Subsequently, experiments were performed with a transient measurement method utilizing the RC time constant of the tissue and an associated electrical circuit. The measured tissue resistance values using this method were found to be much more in line with those previously reported in the literature. Further modifications of the transient measurement system were developed and tested to improve discernment between different types of tissue and to reduce the necessary applied current. The results showed that fat and plasma-Lyte A (a surrogate for blood) could be detected using the methods, leading the way for its use in a practical vessel entry detection system in a clinical setting.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Qaium, EhsanEHQ1@pitt.eduEHQ1
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairClark, Williamwclark@pitt.eduwclark
Committee MemberVipperman,
Committee MemberDezfulian,
Date: 7 November 2018
Date Type: Publication
Defense Date: 19 April 2018
Approval Date: 7 November 2018
Submission Date: 31 May 2018
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 139
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: catheter, nurse, IV, Needle, Physician, Accucath, vascular, Hospital, Therapy, Treatment, Medicine, Guidewire
Date Deposited: 07 Nov 2019 06:00
Last Modified: 07 Nov 2019 06:00


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