VibroNav/May26_CandleGel_Pump_Experiment

Main Protocol

Performer: Kuba

Purpose / Hypothesis

Whether pulse can be detected instead of needle depth

Equipment and Setup

• —Needle size: 22G
• —Needle tip: Quincke
• —Used sensor: M.4.4.1.22G
• —Punctured material: Candle gel

Phantom setup: A fully filled tube embedded inside a angled surface candle gel box. We needed needle tip distances relative to the tube, with different needle depth in the same time. For this purpose, a candle gel box with an embedded tube was built.

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Experimental Setup

• —Tube size: 10 × 8 mm
• —Pump speed: 22 rpm
• —Measurements performed at room temperature

Distances

• —Vertical distance from tube center to bottom of box: 3.5 cm
• —Distance from tube center to top surface: 6.3 cm
• —Candle gel surface begins at a radial distance of 6.3 cm from the tube center. In highest point due to angled-surface configruation.

Measurement Points

For each column and each row many recordings were made for different distane from needle tip to tube center.

Each consecutive recording is separated by 5 mm along the radial direction toward the tube center.

The distance to the tube in the Z axis in the recorded signal can be taken from the filename (see Filename Meaning section).

The starting point in the Z axis was different for columns due to angled-surface.

Surface Measurement Pattern

Measurements were performed on a grid placed on the candle gel surface.

Grid Layout

• —6 columns: e, f, g, h, i, j
• —Each column contained 11 rows (10 rows + tube row)

The central row corresponds to the row where the tube is located:

• —5 rows above the tube
• —5 rows below the tube

Row Spacing

• —10 mm spacing between most adjacent rows (1–5, 6–10)
• —15 mm spacing between:
• —row 5 and tube
• —tube and row 6

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Filename Meaning

Example filename: \ e100.5FoamSpeed-322gquincke120mmM.4.4.1.22G2026-06-11_11.29.04.wav \

Format: \ column-rowdistanceToTubeInCMSmaterialspeedneedle-typesensor-typetimestamp

distanceToTubeInCM/S

• —Measured in the Z axis
• —Independent distance originating from the row

Additional notes:

• —Sensor placed on channel 0
• —Channel 1 not connected

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