DE8815712U1 - 30 Gauge Spinal Needle - Google Patents

Description

Dr.med.Timm Ahlhelm and Prof.Dr.med.Volker Hempel

Broom friction

Long 3U Gauge Spinal Needle

The invention relates to an extra-long fine spinal needle.

Spinal needles have been used for spinal anesthesia for around 90 years. Due to the post-spinal headache, nausea, vomiting, hearing impairment and paresis of the cranial nerves caused by needle-related CSF drainage, spinal anesthesia was limited to a certain age group of patients. The headache depends on the size of the outer diameter of the needle. Spinal needles are commercially available in sizes 20 to 29 gauge.

With these needles, depending on the outer diameter, spinal anesthesia can be performed with or without an inducer (introducer needle) as a form of anaesthesia. Postoperative analgesia, on the other hand, must be continued with systemic means and thus, depending on the analgesic, places a strain on the patient's organism. In addition, adequate therapy for postoperative pain alone is not sufficiently guaranteed. '.!..'

The invention is based on the object of eliminating the above-described disadvantages of spinal anesthesia.

Using a 112 mm long spinal needle, which has an upper length of 24 mm compared to the conventional spinal needle, and an outer diameter of 0.3 mm (30 gauge), in combination with a 16 - 18 gauge TUOHY needle, a _spinal anesthesia and an epidural anesthesia can be performed in the same "operation". The procedure is called "transdural anesthesia".

The drawing shows the invention's object in one view, 20° needle cut, outer and inner diameter. The needle has a length of 112 mm (1) <without Luer cone> euf.Sis has a 20° needle cut (4).The outer diameter is 0.3 mm = 30 gauge (2), the inner diameter is 0.1 - 0.2 mm (3).A commercially available metal Luer cone (5) is located at the end of the needle. This is drawn from medical stainless steel tubing. Compared to the usual spinal needles, it has an "upper length" of 24 mm.The needle is intended for single use.

The 13 gauge epidural needle with TUOHY cut is inserted into the epidural space using the usual technique by loss of resistance. The cut of the TUOHY needle is directed caudally so that the spinal needle and later the epidural catheter have different directions against the dura.

Then insert the 30 gauge spinal needle through the 18 <~, _eye TUÖHY needle into the epidural space and perforate the dura with the spinal needle while recording the perforation click. The spinal needle is firmly attached to the TUOHY needle.

Because of the ultra-thin spinal needle, spontaneous cerebrospinal fluid reflux usually only occurs in the sitting position and then only after a long period of time. For this reason, cerebrospinal fluid aspiration is carried out using an insulin syringe to check the position. The local anesthetic is injected using a 2 ml or smaller syringe to better overcome the considerable injection resistance.

The 30 gauge epidural needle is then removed. The catheter is then turned cranially by 18 ^° with the bevel facing away from the lumen and the epidural catheter is inserted as usual and fixed in place for ^later postoperative pain therapy. The advantage of this method compared to epidural anesthesia is that the anesthesia is completely dense and starts immediately. Compared to conventional spinal anesthesia with thicker needles, it avoids cerebrospinal fluid drainage syndrome with headaches, nausea, vomiting, hearing impairment and paresis of the cranial nerves.

Be2Jgs character list

(1) Length of needle without cone < 112 mm >
External diameter* < 0*3 rrirn = 30 SAUGE >
IhnehdUnchmesser i Öly - 0^2 nim >

(4.) 20"Needle grind

(5) Luer cone < commercially available >

I I I

Claims (1)

Claim for protection 30 gauge spinal needle without stylet,
characterized, that the needle length is 112 mm, i.e. it is 24 mm longer than a "normal" spinal needle. The needle cut is 20°, the cone is a standard metal Luer cone.