Needle Placement
Needle Placement - Related Videos
09:51
Intraosseous Needle Placement
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2023
Source: Julianna Jung, MD, FACEP, Associate Professor of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA For unstable patients requiring urgent administration of medications, fluids, or blood products, establishing vascular access quickly is essential. However, there are many factors that can complicate placement of a peripheral intravenous cannula (PIV), and it is extremely common for PIV attempts to fail. PIV placement may be technically challenging in small...
06:57
Arterial Line Placement
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2023
Source: Sharon Bord, MD, Department of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA When monitoring patients, it is important to obtain values that are accurate and reliable. Blood pressure monitoring is one of the essential vital signs, and for a majority of patients, measuring it utilizing non-invasive techniques provides accurate values. However, there are situations in which the blood pressure requires more exact, specific, and reliable measurements.
08:25
Needle Thoracostomy
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2015
Source: Rachel Liu, BAO, MBBCh, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA A tension pneumothorax is a life-threatening situation in which excess air is introduced into the pleural space surrounding the lung, either through trauma to the chest cavity or as a spontaneous leak of air from the lung itself. Air trapped within the pleural space causes separation of the lung from the chest wall, disrupting normal breathing mechanisms. Pneumothorax may be small without...
09:31
In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses
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Cited by 10 •
2015
Optical coherence tomography (OCT) is a high resolution imaging technique that allows analysis of tissue specific optical properties providing the means for tissue differentiation. We developed needle based OCT, providing real-time imaging combined with on-the-spot tumor differentiation. This publication describes a method for percutaneous, needle based OCT of renal masses.
10:06
Personalized Needles for Microinjections in the Rodent Brain
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Cited by 3 •
2018
We describe here a protocol for microinjection in the rodent brain that uses quartz needles. These needles do not produce detectable tissue damage and ensure reliable delivery even in deep regions. Moreover, they can be adapted to research needs by personalized designs and can be re-used.
FAQs
Anatomical landmarks and palpation help clinicians identify the intended region and align the needle with underlying structures. Patient positioning can expose or stabilize the target, making the planned trajectory more predictable. Together, these measures support controlled advancement and help clinicians avoid nearby tissues when imaging is unavailable or used as an additional guide.
Needle trajectory determines how the needle approaches the target and which structures it may encounter along the way. Clinicians consider the target anatomy, entry point, and direction of advancement to support accurate delivery or sampling. A carefully controlled path can reduce unintended tissue injury and help keep the needle within the intended anatomical space.
Changes in tissue resistance provide tactile information as the needle advances through different structures. Clinicians can monitor this feedback alongside anatomical landmarks, palpation, or imaging to assess whether the needle is following the expected path. Unexpected resistance may prompt closer evaluation of the trajectory, helping support controlled advancement and reduce the chance of unintended placement.
Ultrasound or other imaging can be used when visual guidance is needed to identify the target and monitor the needle path. Landmark-based techniques rely on anatomy and palpation, whereas image guidance adds direct information about the needle’s relationship to tissues or spaces. This distinction is especially relevant for procedures where accurate positioning affects treatment delivery or sample collection.
A typical approach includes identifying the target anatomy, positioning the patient, planning the needle trajectory, and advancing the needle while monitoring resistance and relevant guidance. Sterile technique should be maintained throughout, and the patient should be monitored during the procedure. These steps support reliable access while reducing risks such as infection, tissue injury, or unintended delivery.
Accurate positioning supports a broad range of procedures, including injections, blood sampling, biopsies, aspiration, and catheter access. The required target may be a tissue, vessel, body cavity, or other anatomical space, so the clinician must match the approach to the intended purpose. Successful placement can improve the usefulness of collected material or the precision of treatment delivery.