Timothy Spencer

Timothy Spencer

orcid

Research Focus & Metrics

Academic Career Length

24Years (2003-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 October 2018 in The Journal of Vascular Access
Verified
Journal Article
Closed access
TSTimothy Spencer
Timothy Spencer
MPMauro Pittiruti
Mauro Pittiruti
Ultrasound technology has revolutionized the practice of safer vascular access, for both venous and arterial cannulation. The ability to visualize underlying structures of the chest, neck, and upper/lower extremities provides for greater success, speed, and safety with all vascular access procedures. Ultrasound not only yields superior procedural advantages but also provides a platform to perform a thorough assessment of the vascular structures to evaluate vessel health, viability, size, and patency, including the location of other important and best avoided anatomical structures—prior to performing any procedures. Such assessment is best performed using a systematic and standardized approach, as the Rapid Central Vein Assessment, described in this study.

27 May 2022 in The Journal of Vascular Access
Verified
Journal Article
Open access
FBFabrizio Brescia
Fabrizio Brescia
MPMauro Pittiruti
Mauro Pittiruti
TSTimothy Spencer
Timothy Spencer
RDRobert B Dawson
Robert B Dawson
Insertion of Peripherally Inserted Central Catheters (PICCs) is potentially associated with the risk of immediate/early adverse events, some of them minimal (repeated punctures) and some relevant (accidental arterial puncture or nerve-related injury). Several strategies adopted during the insertion process may minimize the risk of such events, including late complication risks such as infection, venous thrombosis, or catheter dislodgment and/or malposition. This paper describes an update version of the SIP protocol (Safe Insertion of PICCs), an insertion bundle which includes eight effective strategies that aims to minimize immediate, early, or late insertion-associated complications. These strategies include: preprocedural ultrasound assessment utilizing the RaPeVA (Rapid Peripheral Venous Assessment) protocol; appropriate skin antiseptic technique; choice of appropriate vein, adoption of the Zone Insertion Method™; clear identification of the median nerve and brachial artery; ultrasound-guided puncture; ultrasound-guided tip navigation; intra-procedural assessment of tip location; correct securement of the catheter, and appropriate protection of the exit site. This updated version of the SIP protocol includes several novelties based on the most recent evidence-based scientific literature on PICC insertion, such as the clinical relevance of the tunneling technique, the use of ultrasound for intra-procedural tip navigation and tip location, and the new technologies for the protection of the exit site (cyanoacrylate glue) and for the securement of the catheter (subcutaneous anchorage).

24 October 2024 in The Journal of Vascular Access
Verified
Journal Article
Closed access
MRMatheus (Roland) van Rens
Matheus (Roland) van Rens
RLRobin van der Lee
Robin van der Lee
TSTimothy Spencer
Timothy Spencer
TBTon van Boxtel
Ton van Boxtel
Giovanni BaroneGiovanni Barone
Giovanni Barone
O(on behalf of the WoCoVA Foundation (World Conference on Vascular Access) and of the Global Vascular Access Network (GloVANet)
on behalf of the WoCoVA Foundation (World Conference on Vascular Access) and of the Global Vascular Access Network (GloVANet)
The field of vascular access has witnessed significant advancements in recent years, improving healthcare delivery across various patient populations through the use of diverse intravascular access devices. Despite these innovations, a critical issue remains: the lack of a globally standardized set of descriptors for these devices. This gap impedes clear communication and coordination within the healthcare community. Recognizing the necessity for standardized terminology, the Global Vascular Access Network (GloVANet), in collaboration with the World Congress of Vascular Access (WoCoVA), initiated the NAVIGATE project ( N omencl A ture V ia I ntegrated G lobal A dvancements in T erminology E fficiencies). The aim of the project is to propose a clear and practical nomenclature for current vascular access devices, encompassing both central, peripheral venous, and arterial access devices. A panel of international vascular access experts from several clinical domains was selected by the Scientific Committee of WoCoVA to develop a position statement around vascular access device nomenclature. Following a comprehensive literature review, a consensus was reached using a modified Delphi process. The outcome of this collaborative effort is a WoCoVA/GloVANet position statement, which provides standardized nomenclature for vascular access devices. The adoption of unified terminology brings several benefits, firstly, it ensures clarity, reproducibility, and comparability when reporting in clinical studies, and secondly, reduces ambiguous or imprecise terms in communication between healthcare professionals in clinical practice.

11 October 2017 in Journal of Thrombosis and Thrombolysis
Verified
Journal Article
Closed access
PDF file
TSTimothy Spencer
Timothy Spencer
KMKeegan J. Mahoney
Keegan J. Mahoney

1 March 2014 in Critical Care Medicine
Verified
Journal Article
Closed access
EAEvan Alexandrou
Evan Alexandrou
TSTimothy Spencer
Timothy Spencer
SFSteven A. Frost
Steven A. Frost
NMNicholas Mifflin
Nicholas Mifflin
PDPatricia M. Davidson
Patricia M. Davidson
KHKen M. Hillman
Ken M. Hillman
To report procedural characteristics and outcomes from a central venous catheter placement service operated by advanced practice nurses. Single-center observational study. A tertiary care university hospital in Sydney, Australia. Adult patients from the general wards and from critical care areas receiving a central venous catheter, peripherally inserted central catheter, high-flow dialysis catheter, or midline catheter for parenteral therapy between November 1996 and December 2009. None. Prevalence rates by indication, site, and catheter type were assessed. Nonparametric tests were used to calculate differences in outcomes for categorical data. Catheter infection rates were determined per 1,000 catheter days after derivation of the denominator. A total of 4,560 catheters were placed in 3,447 patients. The most common catheters inserted were single-lumen peripherally inserted central catheters (n = 1,653; 36.3%) and single-lumen central venous catheters (n = 1,233; 27.0%). A small proportion of high-flow dialysis catheters were also inserted over the reporting period (n = 150; 3.5%). Sixty-one percent of all catheters placed were for antibiotic administration. The median device dwell time (in d) differed across cannulation sites (p < 0.001). Subclavian catheter placement had the longest dwell time with a median of 16 days (interquartile range, 8-26 d). Overall catheter dwell was reported at a cumulative 63,071 catheter days. The overall catheter-related bloodstream infection rate was 0.2 per 1,000 catheter days. The prevalence rate of pneumothorax recorded was 0.4%, and accidental arterial puncture (simple puncture-with no dilation or cannulation) was 1.3% using the subclavian vein. This report has demonstrated low complication rates for a hospital-wide service delivered by advance practice nurses. The results suggest that a centrally based service with specifically trained operators can be beneficial by potentially improving patient safety and promoting organizational efficiencies.

29 July 2021 in The Journal of Vascular Access
Verified
Journal Article
Open access
PDF file
FBFabrizio Brescia
Fabrizio Brescia
MPMauro Pittiruti
Mauro Pittiruti
MOMatthew Ostroff
Matthew Ostroff
TSTimothy Spencer
Timothy Spencer
RDRobert B Dawson
Robert B Dawson
Insertion of central venous catheters in the cervico-thoracic area is potentially associated with the risk of immediate/early untoward events, some of them negligible (repeated punctures), some relevant (accidental arterial puncture), and some severe (pneumothorax). Furthermore, different strategies adopted during insertion may reduce or increase the incidence of late catheter-related complications (infection, venous thrombosis, dislodgment). This paper describes a standardized protocol (S.I.C.: Safe Insertion of Centrally Inserted Central Catheters) for the systematic application of seven basic beneficial strategies to be adopted during insertion of central venous catheters in the cervico-thoracic region, aiming to minimize immediate, early, or late insertion-related complications. These strategies include: preprocedural evaluation, appropriate aseptic technique, ultrasound guided insertion, intra-procedural assessment of the tip position, adequate protection of the exit site, proper securement of the catheter, and adequate coverage of the exit site.