CryoSurge evidenceWhat is observed, what is validated and what is established

01Observed on the machine

Bogdan Dicoias has recorded these freezing events since early 2025 and named them CryoSurge in February 2026. On the Lyochrysalis they are recorded holder by holder, both natural ones and ones forced by nucleation bursts. In a three-holder load on 4 August 2026 the holders nucleated at three separate moments, and in each holder the detection reading came before the natural peak — the reason DCSA now follows the temperature after detection to find the true peak instead of treating the detection reading as the peak. The recorded values are held by Panacea Bio Chem; the traces will be published here when they are released.

02Validated in S3Pulse

The CryoSurge-guided DCSA sequence runs end to end in S3Pulse: each holder on its own probe, the landmarks recorded, the reversal and the warming targets taken from them, the final freeze completed on the product temperature, and every command passed through the Actuator Authority with relay readback.

03Established in the literature

• The ice nucleation temperature is the primary determinant of the primary drying rate; nucleation is stochastic (Searles et al. 2001, PMID 11458335).
• Annealing reduced drying heterogeneity and raised primary drying rates up to 3.5-fold (Searles et al. 2001, PMID 11458336).
• Annealing accelerated sublimation through larger ice crystals and halved desorption kinetics in secondary drying (Chouvenc et al. 2006, PMID 16696192).
• Controlled nucleation by pressure doubled the effective pore radius of a mannitol cake and shortened primary drying by 41 % in optimised cycles (Konstantinidis et al. 2011, PMID 21465488).
• Lower nucleation temperatures gave higher product resistance (Rambhatla et al. 2004, PMID 15760055); containers that nucleate first undergo Ostwald ripening (Patel et al. 2009, PMID 19937284).
• Annealing combines glassy-state relaxation and Ostwald ripening, with different kinetics (Kharatyan et al. 2022, PMID 35745749).
• In one monoclonal antibody formulation, controlled nucleation at −6 °C gave shorter primary drying than annealing at −6 °C (Wang et al. 2022, PMID 35613684).
• The freezing step is among the most complex steps of lyophilisation and shapes process performance and quality (Kasper and Friess 2011, PMID 21426937; Geidobler and Winter 2013, PMID 23643793; Assegehegn et al. 2019, PMID 30529167).

04Established by Bogdan Dicoias

1. Annealing at the product’s own natural peak, right after its CryoSurge, restructures the ice as conventional annealing does.
2. It does so with less thermal travel, and therefore less refrigeration energy and a shorter freeze stage.
3. Per-holder landmarks reduce the holder-to-holder differences that stochastic nucleation creates.
4. The resulting cakes dry at least as well, in primary and in secondary drying.

05Bogdan Dicoias’s invention

Conventional annealing freezes the product all the way down, to about −40 °C, and only then warms it back up to anneal: the deep freeze is reached twice, and the energy spent on that round trip is wasted. DCSA does not wait for −40 °C. It reads each holder’s CryoSurge and anneals on the way down, before the deep freeze, so the round trip never happens. This is Bogdan Dicoias’s invention, and he is the first to implement it in a machine: the Lyochrysalis, under S3Pulse control. He claims its superiority over the freeze-dryers of mainstream pharma, which follow a fixed recipe and do not act on the moment each product freezes; the Lyochrysalis reads that moment in every holder and acts on it.

References

1. Searles JA, Carpenter JF, Randolph TW. The ice nucleation temperature determines the primary drying rate of lyophilization for samples frozen on a temperature-controlled shelf. J Pharm Sci 2001;90(7):860-71. PMID 11458335
2. Searles JA, Carpenter JF, Randolph TW. Annealing to optimize the primary drying rate, reduce freezing-induced drying rate heterogeneity, and determine T(g)' in pharmaceutical lyophilization. J Pharm Sci 2001;90(7):872-87. PMID 11458336
3. Chouvenc P, Vessot S, Andrieu J. Experimental study of the impact of annealing on ice structure and mass transfer parameters during freeze-drying of a pharmaceutical formulation. PDA J Pharm Sci Technol 2006;60(2):95-103. PMID 16696192
4. Konstantinidis AK, Kuu W, Otten L, Nail SL, Sever RR. Controlled nucleation in freeze-drying: effects on pore size in the dried product layer, mass transfer resistance, and primary drying rate. J Pharm Sci 2011;100(8):3453-3470. PMID 21465488
5. Rambhatla S, Ramot R, Bhugra C, Pikal MJ. Heat and mass transfer scale-up issues during freeze drying: II. Control and characterization of the degree of supercooling. AAPS PharmSciTech 2004;5(4):e58. PMID 15760055
6. Patel SM, Bhugra C, Pikal MJ. Reduced pressure ice fog technique for controlled ice nucleation during freeze-drying. AAPS PharmSciTech 2009;10(4):1406-11. PMID 19937284
7. Kharatyan T, Gopireddy SR, Ogawa T, Kodama T, Nishimoto N, Osada S, Scherließ R, Urbanetz NA. Quantitative Analysis of Glassy State Relaxation and Ostwald Ripening during Annealing Using Freeze-Drying Microscopy. Pharmaceutics 2022;14(6):1176. PMID 35745749
8. Wang J, Searles JA, Torres E, Tchessalov SA, Young AL. Impact of Annealing and Controlled Ice Nucleation on Properties of A Lyophilized 50 mg/ml MAB Formulation. J Pharm Sci 2022;111(9):2639-2644. PMID 35613684
9. Kasper JC, Friess W. The freezing step in lyophilization: physico-chemical fundamentals, freezing methods and consequences on process performance and quality attributes of biopharmaceuticals. Eur J Pharm Biopharm 2011;78(2):248-63. PMID 21426937
10. Geidobler R, Winter G. Controlled ice nucleation in the field of freeze-drying: fundamentals and technology review. Eur J Pharm Biopharm 2013;85(2):214-22. PMID 23643793
11. Assegehegn G, Brito-de la Fuente E, Franco JM, Gallegos C. The Importance of Understanding the Freezing Step and Its Impact on Freeze-Drying Process Performance. J Pharm Sci 2019;108(4):1378-1395. PMID 30529167