Along or across the visual axis: a comparison of two ultrasound screen, needle and transducer orientation techniques

Franco, Chiara; Tayari, Hamaseh; Nardi, Samanta; Briganti, Angela

doi:10.1016/j.vaa.2020.08.009

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…For the US-guided SN block technique, a 21-gauge, 50 mm echogenic insulated needle (Echoplex, Vygon, Swindon, UK) with an attached extension line primed with the injectate solution was inserted through the tensor fascia latae muscle in a cranio-caudal orientation towards the neurovascular bundle. The along visual axis technique (the long axis of ultrasound probe was along the operator’s visual axis and ultrasonic beam and vertical to the surface) and in-plane needling approach were used to perform the US-guided SN block with lidocaine-dye mixture injections in all cadavers [ 22 ]. The position of the tip of the needle was deemed satisfactory when it pierced the medial femoral fascia containing the SN and the FA and Femoral vein (FV).…”

Section: Methodsmentioning

confidence: 99%

Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

Felisberto¹,

Flaherty²,

Tayari³

2022

Animals

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Ultrasound-guided (US-guided) loco-regional anesthesia techniques allow direct visualization and blockade of sensory nerves. The saphenous nerve (SN), a terminal branch of the femoral nerve (FN), is strictly a sensory nerve for which electrical locator devices are ineffective for localization as no effector muscle contractions can be evoked. US-guided SN block in species other than rabbits produces hind-limb analgesia without affecting FN motor function. The aims of this study were to develop a US-guided SN block technique in rabbits and to compare the spread obtained using two different dye volumes. Twelve hind-limbs from six cadavers (1.62 ± 0.1 kg) were included; after randomization, the SN block was performed on the right or left hind-limb, injecting 0.05 mL kg−1 or 0.1 mL kg−1 of tissue dye in lidocaine (1:50 v:v). Subsequent dissections allowed nerve staining measurements. All SNs were identified, and 19.2 ± 6.2% and 34.7 ± 16.1% of the SN length were stained using low-volume and high-volume of the dye, respectively. Regardless of the volume used, the SN was consistently stained while the motor branch of the FN was not. This US-guided technique may provide hind-limb analgesia without affecting FN motor function in rabbits undergoing mid-distal hind-limb surgeries.

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Section: Methodsmentioning

confidence: 99%

Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

Felisberto¹,

Flaherty²,

Tayari³

2022

Animals

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“…Ultrasound-guided sciatic, saphenous and obturator nerve blocks were performed as previously described [14][15][16] using 0.1 mL kg − 1 0.5% ropivacaine (Naropina; AstraZeneca, Verona, Italy). All blocks were performed using an in-plane visual axis technique 17 with a dedicated echogenic needle (Visioplex, Vygon Italia S.r.l., Padua, Italy) and a linear transducer (HFL50, 15-6 MHz Linear Transducer). Operators performing blocks and clinicians monitoring patients throughout the intra-and postoperative periods were blinded to the study CRI administered.…”

Section: Study Protocolmentioning

confidence: 99%

Effect of dexmedetomidine infusion on the analgesic duration of peripheral nerve blocks in dogs: a randomized clinical study

Franco,

Batisti,

Boysen

et al. 2024

Preprint

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The aim of this study was to evaluate whether a continuous rate infusion (CRI) of dexmedetomidine could prolong the analgesic effect of peripheral nerve blocks. Twenty client-owned dogs were enrolled and randomly divided into 2 groups. The DEX group received dexmedetomidine infusion at 1 mcg kg-1 h-1, and the NaCl group received an equivalent volume infusion of saline. Sciatic, saphenous and obturator nerve blocks were performed using 0.1 mL kg-1 0.5% ropivacaine/block. Intraoperative fentanyl was administered if the heart rate and/or mean arterial pressure (MAP) increased >15% from the previous measurement, and vasopressors were administered if the MAP was ≤ 70 mmHg. Postoperative pain was assessed every hour using the Glasgow Composite Pain Scale (GCPS). Postoperative rescue analgesia consisted of methadone (0.2 mg kg-1 IV) and carprofen (2 mg kg-1 IV). A greater number of dogs in the NaCl group required fentanyl (5/10 p= 0.03) and vasopressors (8/10, p=0.02) than did those in the DEX group (0/10 and 2/10, respectively). The duration of postoperative analgesia was significantly longer (604 ± 130 minutes) in the DEX group than in the NaCl group (400 ± 81 minutes, p=0.0005). Dexmedetomidine infusion at 1 mcg kg-1 h-1 reduces intraoperative analgesic and vasopressor requirements during orthopedic surgery and prolongs the postoperative analgesic effect of nerve blocks.

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“…All blocks were performed by the same anesthetist (M.D.) using an along visual axis technique [28] with a dedicated veterinary ultrasound system (Sonosite S II Veterinary Ultrasound System, Fujifilm Italia S.p.a., Milan, Italy) and a linear ultrasound probe (HFL50, 15-6 MHz Linear Transducer). The QLB LQL-T was performed as described by Garbin et al [17] using an 85 mm echogenic needle for nerve blocks (Visioplex, Vygon Italia S.r.l., Padua, Italy).…”

Section: Preoperative Managementmentioning

confidence: 99%

Postoperative Analgesic Effect of Bilateral Quadratus Lumborum Block (QLB) for Canine Laparoscopic Ovariectomy: Comparison of Two Concentrations of Ropivacaine

Degani,

Di Franco,

Tayari

et al. 2023

Animals

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The aim of this study was to evaluate the effect of the transverse quadratus lumborum block (QLBLQL-T) on time to the first postoperative rescue analgesia in dogs submitted to laparoscopic ovariectomy. A total of twenty-three female dogs were included. Dogs were randomly assigned to receive a bilateral QLBLQL-T, performed either with 0.3 mL kg−1 ropivacaine 0.5% [group QLB0.5% (n = 8)] or with ropivacaine 0.33% [group QLB0.33% (n = 8)] or a fentanyl-based protocol [group No-QLB (n = 7)]. Dogs were premedicated intravenously (IV) with fentanyl 5 mcg kg−1, general anesthesia was induced IV with propofol and maintained with sevoflurane. Invasive mean arterial pressure (MAP) values were recorded five minutes before and five minutes after performing the QLBLQL-T. The short-form of the Glasgow composite measure pain scale was used every hour after extubation, and methadone 0.2 mg kg−1 was administered IV when pain score was ≥5/24. Kolmogorov–Smirnov test, ANOVA test combined with Tukey post hoc test, Student’s T-test and Chi-square test were used to analyze data; p < 0.05. Time from QLBLQL-T to the first rescue analgesia was significantly longer in QLB0.5% than in group QLB0.33% and No-QLB. MAP pre- and post-block decreased significantly only in group QLB0.33%.

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Along or across the visual axis: a comparison of two ultrasound screen, needle and transducer orientation techniques

Cited by 7 publications

References 11 publications

Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

Effect of dexmedetomidine infusion on the analgesic duration of peripheral nerve blocks in dogs: a randomized clinical study

Postoperative Analgesic Effect of Bilateral Quadratus Lumborum Block (QLB) for Canine Laparoscopic Ovariectomy: Comparison of Two Concentrations of Ropivacaine

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