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The "agnes fast" craniotomy: the modified pterional (osteoplastic) craniotomy.

ABSTRACT: The "Agnes Fast" craniotomy is a fast and simple way of performing the pterional craniotomy while preserving the temporalis muscle, together with its fascia and bony attachment. Using this technique, the surgeon need not divide the temporalis muscle, separate it from its bony attachment, or perform an interfacial dissection. With a little practice, this craniotomy can be performed in less than 5 minutes and is highly recommended in emergent settings. The modified pterional craniotomy was performed in 10 cadaveric specimens, preserving the temporalis muscle with its attachment. An interfascial dissection was not performed while exposing the frontozygomatic process. The exposure gained, the length of the procedure, and the ease of application were recorded for all heads studied. In all heads studied, the Agnes Fast craniotomy was performed, with complete preservation of the temporalis muscle and its attachments. This procedure was performed quickly, with complete preservation of the fascial nerve and its branches. The muscle was put back in its natural place following the craniotomy. The Agnes Fast craniotomy offers a fast way of performing a pterional craniotomy while preserving the temporalis muscle, with its blood supply, neural innervation, bony attachment, and fascia intact. Replacing the muscle is also fast and simple and involves placement of two CranioFix (Aesculap, Inc., Center Valley, PA) holders to the bone, with no suture material. This approach does not limit the exposure gained and offers the same exposure as the "usual" pterional craniotomy.

SUBMITTER: Ezer H

PROVIDER: S-EPMC3312107 | biostudies-other | 2011 May

REPOSITORIES: biostudies-other

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Project description:ImportanceImplementing multidisciplinary teams for treatment of complex brain tumors needing awake craniotomies is associated with significant costs. To date, there is a paucity of analysis on the cost utility of introducing advanced multidisciplinary standardized teams to enable awake craniotomies.ObjectiveTo assess the cost utility of introducing a standardized program of awake craniotomies.Design, setting, and participantsA retrospective economic evaluation was conducted at Mayo Clinic Florida. All patients with single, unilateral lesions who underwent elective awake craniotomies between January 2016 and December 2021 were considered eligible for inclusion. The economic perspective of the health care institution and a time horizon of 1 year were considered. Data were analyzed from October 2022 to May 2023.ExposureTreatment with an awake craniotomy before standardization (2016-2018) compared with treatment with awake craniotomy after standardization (2018-2021).Main outcomes and measuresPatient demographics, perioperative, and postoperative outcomes, including length of stay, intensive care (ICU) admission, extent of resection, readmission rates, and 1-year mortality were compared between patients undergoing surgery before and after standardization. Direct medical costs were estimated from Medicare reimbursement rates for all billed procedures. A cost-utility analysis was performed considering differences in direct medical costs and in 1-year mortality within the periods before and after standardization of procedures. Uncertainty was explored in probability sensitivity analysis.ResultsA total of 164 patients (mean [SD] age, 49.9 [15.7] years; 98 [60%] male patients) were included in the study. Of those, 56 underwent surgery before and 108 after implementation of procedure standardization. Procedure standardization was associated with reductions in length of stay from a mean (SD) of 3.34 (1.79) to 2.46 (1.61) days (difference, 0.88 days; 95% CI, 0.33-1.42 days; P = .002), length of stay in ICU from a mean (SD) of 1.32 (0.69) to 0.99 (0.90) nights (difference, 0.33 nights; 95% CI, 0.06-0.60 nights; P = .02), 30-day readmission rate from 14% (8 patients) in the prestandardization cohort to 5% (5 patients) (difference, 9%; 95% CI, 19.6%-0.3%; P = .03), while extent of resection and intraoperative complication rates were similar between both cohorts. The standardized protocol was associated with mean (SD) savings of $7088.80 ($12 389.50) and decreases in 1-year mortality (dominant intervention). This protocol was found to be cost saving in 75.5% of all simulations in probability sensitivity analysis.Conclusions and relevanceIn this economic evaluation of standardization of awake craniotomy, there was a generalized reduction in length of stay, ICU admission time, and direct medical costs with implementation of an optimized protocol. This was achieved without compromising patient outcomes and with similar extent of resection, complication rates, and reduced readmission rates.

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The "agnes fast" craniotomy: the modified pterional (osteoplastic) craniotomy.

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