Medical needles

In medicine, two main types of needles are used - hollow (for injection using syringes , sampling / transferring samples, samples) and surgical (for suturing).

Content

1 hollow needles
- 1.1 Type of tip
- 1.2 Characteristics of needle gauges
- 1.3 Materials for hollow needles
2 See also
3 notes

Cannula

Point Type

Tip type	Note
As	a special conical type of needle tip; intended for repeated administration of samples; only used with syringes for automatic samplers
2	the point, beveled at an angle of 10 - 12 °, does not cut the core when piercing the septum ; optimal needles of caliber 26s −22s
3	blunt needle tip for use with liquid chromatograph injectors and for sampling and transferring samples
four	needle tip cut at 10 - 12 °; recommended for biology and medicine; special types of points are available on request, e.g. with bevel 45 °
5	a conical point with a side hole for piercing septa, thin vinyls and plastics without core formation; minimizes septic damage

Needle gauge specifications

Characteristics of gauge needles ^[1] :

Caliber	External diameter mm	Inner diameter mm	Wall thickness mm	Volume µL / cm
33	0.21	0.11	0.05	0.10
32	0.24	0.11	0.05	0.10
31	0.26	0.13	0.06	0.13
thirty	0.31	0.16	0.08	0.20
28	0.36	0.18	0.09	0.25
27	0.41	0.21	0.10	0.35
26s	0.47	0.13	0.18	0.13
26	0.46	0.26	0.10	0.53
25	0.51	0.26	0.13	0.53
24	0.57	0.31	0.13	0.75
23	0.64	0.34	0.15	0.91
22s	0.72	0.15	0.28	0.18
22	0.72	0.41	0.15	1.32
21	0.82	0.51	0.15	2.04
twenty	0.91	0.60	0.15	2.83
eighteen	1.27	0.84	0.22	5.54
17	1.47	1.07	0.20	8.99
16	1.65	1.19	0.23	11.12
fourteen	2.11	1.60	0.25	20.11
13	2.41	1.80	0.31	25.45
12	2.77	2.16	0.31	36.64
eleven	3.05	2.39	0.33	44.86
10	3.40	2.69	0.36	56.83

Hollow Needle Materials

Extract from GOST R ISO 9626-2013: Tubes must be made of austenitic stainless steel of one of the types shown in table 1, or the corresponding designation given in table 2 of ISO / TR 15510.

Table 1 - Types of stainless steel for needle tubes

Designation in ISO / TR 15510 and EN 10088-1	Row number in tables 1 and 2 of ISO / TR 15510	Corresponding type in ISO 9626 and ISO 683-13 (for information only)
X2CrNi 18-9	one	10
X5CrNi 18-9	6	eleven
X6CrNiNb 18-10	17	16
X5CrNiMo 17-12-2	26	twenty
X6CrNiMoTi 17-12-2	28	21
X6CrNiMoNb 17-12-2	29th	23

Disposable injection needles of various sizes with plastic cannulas
Disposable injection needles in caps and for acupuncture (bottom) in sterile packaging
Reusable needles with cannula such as "Record"
Different shapes of hollow needles
Disposable injection needle with dental case

Notes

↑ http://www.cheminst.ru/docs/cgf-bc-bd/ Archived October 10, 2009 on Wayback Machine Needle specifications

[1] ttp://www.cheminst.ru/docs/cgf-bc-bd/ Archived October 10, 2009 on Wayback Machine Needle specifications