Prospective, Randomized, Surgeon-Blinded Comparison of Standard Magnification Assumption vs Magnification Marker Usage for Preoperative Templating in Total Hip Arthroplasty

Archibeck, Michael J.; Tripuraneni, Krishna R.; Carothers, Joshua T.; Junick, Daniel W.; Munson, Natalie R.; Murray‐Krezan, Cristina

doi:10.1016/j.arth.2017.05.016

Cited by 16 publications

(19 citation statements)

References 9 publications

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“…Within the literature there is a preference for the use of fixed MF. 6,10,12,[17][18][19] However our results suggest that fixed MF values of 110-120% could be too low for accurate templating. To our knowledge, studies that prefer the use of a fixed MF have neglected to mention the effect of patient body habitus.…”

Section: Discussionmentioning

confidence: 66%

“…Our results confirm this (See Table 4). Archibeck et al 10 compared ECM and 121% fixed magnification templating techniques. They concluded that a fixed magnification is clinically less time consuming and less dependent on positioning error.…”

Section: Discussionmentioning

confidence: 99%

“…1 , 2 , 3 Pre‐operative templating using digital radiography is an effective method of planning for THA. 2 , 4 , 5 , 6 , 7 , 8 , 9 , 10 This method allows for the surgeon to estimate the size of a component from the size of a small metal ball known as an external calibration marker (ECM), or through the use of a fixed magnification factor (MF) (See https://www.materialise.com/en/medical/orthoview/smart‐planning for further information). However, these methods rely on accurate and consistent radiographic positioning by the radiographer, which anecdotally can be poorly executed in clinical practice.…”

Section: Introductionmentioning

confidence: 99%

“…The primary goal of total hip arthroplasty (THA) is pain reduction and restoration of normal hip function, whilst limiting the rate of intra‐operative and post‐operative complications. 3 , 10 , 11 , 12 This can be achieved via accurate pre‐operative radiographic pelvic templating prior to surgical intervention. Pelvic templating relies on an understanding of the theory behind divergence of ionising radiation from a point source, and more specifically the factors, which can affect the magnification of a radiographic image: source‐to‐image distance (SID), source‐to‐object distance (SOD) and lateral positioning (See Fig.…”

Section: Introductionmentioning

confidence: 99%

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Pre‐operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?

Holliday

Steward

2021

J of Medical Radiation Sci

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Introduction: Pre-operative templating using digital radiography is an effective method of planning for total hip arthroplasty (THA) and requires a generalised fixed magnification factor (MF) or external calibration markers (ECM). The effect on image magnification when changing source-to-image distance (SID), object-to-image distance (OID) and different imaging conditions is not well described. This study aims to quantify the range of effects manipulation of radiographic parameters can have on image magnification across different body habitus and imaging conditions. Methods: A simple phantom study was performed. A 25 mm ECM was placed at eight different OID values along the anterior-posterior phantom plane at three different SID values and imaging conditions, and X-rays were obtained. On each radiograph, the ECM was measured using a line calliper tool by three radiographers and recorded. The MF was calculated and recorded. Results: The smallest observed image MF was 1.16, for an 8 cm OID, 120 cm SID with the ECM placed within the central ray and the X-ray detector in bucky underneath the X-ray table. The largest image MF was 1.40 for a 15 cm OID, 100 cm SID with the X-ray detector placed underneath an emergency department imaging trolley. Conclusions: Digital pre-operative templating for THA relies on accurate radiographic positioning and is dependent of the patient body habitus, radiographic parameters and imaging conditions selected by the radiographer. The use of appropriately positioned ECMsplaced medially between the patient's internally rotated legs at the level of the greater trochanter, lowers the potential for magnification inaccuracies.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pre‐operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?

Holliday

Steward

2021

J of Medical Radiation Sci

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“…Primary total hip arthroplasty (THA) is considered to be potentially advantageous for patients who have the severe hip disease. [1–3] However, as previously reported, the total blood loss associated with has been reported ranges from 700 to 2000 mL, and the incidence of transfusion requirements ranged from 16% to 38%. [4–7] Minimizing the risk of blood loss has always been a goal for surgeons because perioperative anemia is potentially associated with increased morbidity and costs.…”

Section: Introductionmentioning

confidence: 91%

Transfusions and cost-benefit of oral versus intravenous tranexamic acid in primary total hip arthroplasty

Wang¹,

Xiong²,

Xu³

et al. 2019

Medicine

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Background:The purpose of this study was to assess the cost benefit and transfusions of oral and IV tranexamic acid (TXA) in primary total hip arthroplasty (THA).Methods:PubMed, Embase, Web of Science, and the Cochrane Library were systematically searched for randomized controlled trials (RCTs) comparing oral and IV TXA in primary THA. Primary outcomes were total blood loss, maximum hemoglobin drop, transfusion requirements, and cost benefit. Secondary outcomes were length of stay, deep venous thrombosis (DVT) and/or pulmonary embolism (PE).Results:Four independent RCTs were included involving 391 patients. There was no difference in the total blood loss (P = .99), maximum hemoglobin drop (P = .73), and the length of stay (P = .95) between the 2 groups. Transfusion requirements (P = .97) were similar. The total mean cost was the US $75.41 in oral TXA group and the US $580.83 in IV TXA group. The incidence of DVT (P = .3) did not differ significantly between the 2 groups, and no PE was reported in all studies.Conclusion:Oral TXA shows similar efficacy and safety as IV TXA in reducing total blood loss, maximum hemoglobin drop and transfusion requirements in primary THA. However, oral TXA may be more cost-benefit than IV TXA.Level of Evidence:Level I, therapeutic study.

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Influence of calibration on digital templating of hip arthroplasty

Boese

Wilhelm

Haneder

et al. 2018

International Orthopaedics (SICOT)

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Prospective, Randomized, Surgeon-Blinded Comparison of Standard Magnification Assumption vs Magnification Marker Usage for Preoperative Templating in Total Hip Arthroplasty

Cited by 16 publications

References 9 publications

Pre‐operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?

Pre‐operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?

Transfusions and cost-benefit of oral versus intravenous tranexamic acid in primary total hip arthroplasty

Influence of calibration on digital templating of hip arthroplasty

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