The EpiFinder device, which is the investigational device in this study, is intended for use in epidural procedures, between a luer syringe and an epidural needle, to give the treating physician a clear indication that the needle tip has entered the epidural space. The objective of this First In Human study is to evaluate the safety and performance of using the EpiFinder to identify the epidural space in subjects with a clinical indication to receive a lumbar Epidural Steroid Injections.

Inclusion Criteria:

• Subject is 18 years or older
• Subject with clinical indication for lumbar ESI based on subject's clinical problem (e.g. DDD hernia disc, spinal stenosis)
• Subject understands the study requirements and the treatment procedures and provides written Informed Consent before any study-specific tests or procedures are performed

Exclusion Criteria:

• Subject with marked spinal deformities
• Previous back surgery
• Contraindication for epidural injections (e.g. continuous use of anticoagulants, infection, allergic reactions to the injected substances)
• Subject has known hypersensitivity to contrast media that cannot be pre-medicated
• Subject with severe obesity (body mass index >35 kg/m2)
• Subject observed seizure within 7 days prior to study enrollment
• Subject presenting for emergency
• Subject has a skin condition (i.e., hemangioma, scleroderma, psoriasis, rash, open wound or tattoo) in their lumbar region
• Subject is pregnant (to be determined by urine pregnancy test)
• Subject who is currently participating or has participated in an investigational study, within the past 30 days

All subject data will be anonymized, using only subject number and initials. All source data, such as laboratory results, will be kept on site only and will not be forwarded to the sponsor. All subject personal data will not be published.