protocolSection identificationModule nctId: NCT06382220, orgStudyIdInfo id: R550, briefTitle: Low Dose Bupivacaine Versus Prilocaine Regarding Hemodynamic Stability and Safety in Geriatrics, statusModule overallStatus: RECRUITING, startDateStruct date: 2024-04-23, primaryCompletionDateStruct date: 2024-07-25, completionDateStruct date: 2024-08-15, studyFirstPostDateStruct date: 2024-04-24, lastUpdatePostDateStruct date: 2024-04-25, sponsorCollaboratorsModule leadSponsor name: Fayoum University Hospital, class: OTHER, descriptionModule briefSummary: Orthopedic interventions under spinal anesthesia is considered a common practice in elderly patients undergo surgery, and may be associated with lower risks of death, delirium,and major medical complications .Spinal anesthesia can cause disastrous hemodynamical changes in the form of hypotension and bradycardia in elderly patients due to limited physiological reserve and presence of systemic illness . The degree of hypotension is proportional to the extent of sympathetic blockade. thus unilateral Spinal anesthesia described by Tanasichuk et AL. was used aiming to minimize these hymodynamical changes compared to bilateral block by restricting the extent of sympathetic blockade.Bupivacaine has been used in spinal anaesthesia in orthodecic surgeries . It provides a short motor block onset time with a long motor block duration . If bupivacaine is used, the main disadvantage is the significant inter-individual variability with clinically significant differences in onset time, dermatomal spread and motor block duration . Prilocaine is a local anaesthetic agent that belongs to the same family as bupivacaine. In the last decade and with the development of day surgery, prilocaine 2% has become more commonly used for orthopaedic surgical procedures . Prilocaine induces a shorter motor block with less urinary retention, which better facilitates enhanced recovery after surgery . Usually, doses administered in spinal anaesthesia vary from 20 to 80 mg . Given the intermediate motor block duration,The aim of this studyTo compare between Unilateral low dose spinal anesthesia using bupivacaine versus prilocaine regarding hemodynamical stability and safety in below knee orthopedic surgeries in elderly people., conditionsModule conditions: Recruitment, designModule studyType: INTERVENTIONAL, phases: PHASE1, phases: PHASE2, designInfo allocation: RANDOMIZED, interventionModel: PARALLEL, primaryPurpose: TREATMENT, maskingInfo masking: QUADRUPLE, whoMasked: PARTICIPANT, whoMasked: CARE_PROVIDER, whoMasked: INVESTIGATOR, whoMasked: OUTCOMES_ASSESSOR, enrollmentInfo count: 100, type: ESTIMATED, armsInterventionsModule interventions name: Bupivacain, outcomesModule primaryOutcomes measure: The rate of occurrence of hypotension, eligibilityModule sex: ALL, minimumAge: 60 Years, maximumAge: 90 Years, stdAges: ADULT, stdAges: OLDER_ADULT, contactsLocationsModule locations facility: Fayoum University hospital, status: RECRUITING, city: Fayoum, state: Faiyum Governorate, zip: 63514, country: Egypt, contacts name: Mohamed A Hamed, MD, role: CONTACT, phone: 01118560065, phoneExt: 02, email: mah07@fayoum.edu.eg, contacts name: Mahdy A Abdelhady, MD, role: CONTACT, phone: 0120363256, phoneExt: 02, email: maa45@fayoum.edu.eg, geoPoint lat: 29.30995, lon: 30.8418, hasResults: False